Top Circuits Page 96
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The schematic diagram come from circuit: 60 Watt Switching Power Supply power supply. Go to that page to read the explanation about above power supply related circuit diagram. The schematic shows the power supply capacity of 70W stereo amplifier Power....
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To celebrate the hundredth design posted to this website, and to fulfil the requests of many correspondents wanting an amplifier more powerful than the 25W MosFet, a 60 - 90W High Quality power amplifier design is presented here. Circuit topology is about....
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This is my first successful vacuum tube project. The output of this small amplifier in which a 6V6GT output pentode is connected as triode is about 4. 5 watts. This project involves a single ended audio amplifier, which consists of a resistive input network,....
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7 segment display driver circuit based on 7446. seven segment display system, 7 segment decoder/ driver . Sinking and sourcing 7 segment display driver...
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The schematic diagram come from circuit: 70 W Switching Power supply with KA2S0880 IC power supply. Go to that page to read the explanation about above power supply related circuit diagram. The schematic shows the power supply capacity of 70W stereo....
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This circuit is 73 MHz Hallogene Radio-Controlled Lights. The purpose is to control the power state of a hallogene light by remote control. When we press the push of a remote control Botton, state lamp power will change, so, if the lamp is lit, it will be....
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The following circuit shows about 741 IC For Constant Temperature Control Circuit Diagram. Features: used to lower the drift of a Ramsey FM10a ...
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This is Infra-Red Remote Control Tester circuit. This circuit is used to test go/no-go of any remote control transmitting infra-red (IR) light. The supply of this circuit is 3V battery. This circuit has some advantages, such as fits in a compact enclosure,....
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The circuit is quite simple thanks to the use of MAX638CPA 5V CMOS Step Down Adjustable Switching Regulator IC. With this IC input voltage of 12 to 16 Vdc converted into direct voltage 5VDC. You can see here is only using 9 additional external components to....
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The most important part of this 88-108 transmitter is the Colpitts oscillator. C3,C4,C5,C6,CD1-CD2 ans L1 determine the transmission frequency. The RF Osci...
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Herein is the scematic picture of 9-Pin RS232 Line Booster Signal Direction. This device is a 9-pin RS-232 repeater that re-transmits all 8 signals and carries the ground line through..
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This is a circuit of 90-125 MHz Crystal which is very useful for VHF/UHF converters. This circuit provide 5 to 15 mW output. High-quality fifth- or seventh-over-tone crystal type can be used in this circuit. Undesired oscillation never reach above 500 MHz....
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This add-on board is designed to provide a pair of balanced audio outputs for the High-Quality Stereo DAC (Digital to Analog Converter). Two 3-pin male XLR connectors are used for the new outputs and they can either replace or augment the existing unbalanced....
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The purpose of this circuit is to power a lamp or other appliance for a given time (30 minutes in this case), and then to turn it off. It is useful when reading at bed by night, turning off the bedside lamp automatically in case the reader falls asleep.....
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One of the simplest method of metal detecting is by beat frequency oscillator. Basically, the circuit consist of two balanced oscillator. One oscillator provides the reference signal, and other oscillator is acting as the detector element. The reference....
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Using the A3952S stepper motor controller designed by Allegro MicroSystems can be designed a very simple and useful motor driver circuit that can be used in many electronic applications. A3952S stepper motor controller is capable of continuous output....
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The? following circuit shows about AC Motor Speed Controller Kit - K2636 Circuit Diagram. Features: normal dimmers the kit performs, with carbon ...
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The high durability nature of a light emitting diode (LED) make it suitable for ON/OFF indicator application. Because the limitation on low operating voltage,...
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Rejection Ratio (CMRR) which enables rejection of high frequency common-mode voltage. This will result in the rejection of higher ambient levels of noise from utility lines, industrial equipment, and other radiating sources. The following circuit diagram....
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The following circuit shows about AD8531 IC For LCD Panel Backlight Automatic Control Circuit. Features: can compensate for aging effects and the ...
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The ADM660 is a charge-pump voltage converter that can be used to either invert the input supply voltage or double it. The schematic below appearsADM660 Voltage Inverter Circuit Configuration Diagram. This inverting schematic is ideal for generating a....
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This is a ADP1821 Step Down DC-to-DC Converter circuit. This circuit uses ADP1821 that is synchronous pulse-width-modulated (PWM), step-down controller,...
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This digital-to-analog converter (DAC) integrated circuit is designed for lowest noise performance, both radiated and conducted noise. A recommendedconnection diagram for the ADV7123 is shown in the following schematic diagram. According tothe ADV7123....
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signal detector electronics that can be used to detect the signal does not AF / RF. This series is very neat and easy to make...
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TDA1072AT is a special purpose integrated circuit for AM radio receiver from Philips Semiconductors. The integrated circuit is designed for mains-fed home receivers and car radios. The voltage-controlled oscillator provides signals with extremely low....
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The AM Transmitter circuits in two and a half, audio amplifier and an RF oscillator. The oscillator is built around Q1 and associated components. Tank circuit L1 and VC1 is melodious from about 500kHz to 1600KHz. These components can be used from an old MW....
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The following circuit shows about AT90LS2323 Microcontroller Circuit Diagram. Features: 2.7 ? 6 volts, Can work in all 2323 chips. .Component: ...
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Here the complete electrical circuit diagram of line follower robot which built based on ATmega16. There are three modules of line follower robot circuit that are sensor module, microcontroller module and DC motor module. Download thedocument of ATmega16....
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This is the circuit diagram of Line Follower / Line Tracker robot. The circuit taken from the tutorial documentation. You may download the full tutorial at the end of this article. The line follower robot use 8 pieces of proximity sensor module. The sensor....
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This is a Low-Cost Accurate Square-Root Circuit. This circuit is used to provide a square-root function with a good accuracy. The benefit of This circuit is...
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Active power factor correction stabilize the electrical demand of a device to give the best power factor characteristic of many types of loads. To meet power factor regulation, a low cost solution should be designed. In many application, the need of high DC....
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We aim to transmit more information by carrying articles. Please send us an E-mail to wanghuali@hqew. net within 15 days if we are involved in the problems of article content, copyright or other problems. We will delete it soon. ..
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The first thing you must have in your workshop/lab is power supply. In experimenting many new electronic circuit design, it is easier if you have a flexible adjustable power supply. Here is an adjustable 0-30 volts power supply design. The circuit schematic....
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This is Adjustable Constant Current Regulator circuit. This circuit can be used in a bench power supply to prevent the circuit that are tested from being...
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This circuit uses the versatile MAX038 function generator. Although in this circuit some of the advanced characteristics of this IC are disabled, you can generate Sine, Triangle, Square waves (adjusting A0 and A1 pins see datasheet on if you want other....
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The schematic diagram come from circuit: Adjustable High Voltage Power Supply 0 to 1000V power supply. Go to that page to read the explanation about above power supply related circuit diagram. To supply the high voltage converter suitable source of....
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This battery chargercircuitis regulated and adjustable to make this circuit able to charge the mosto NiCAD battery. This circuit will work for single cell or multi battery cell which connected with series/parallel connection. The maximum voltage of the....
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Adjustable Regulated Power Supply 0-15V 1A. Adjustable Regulated Power Supply 0-15V 1A. The output voltage is stabilized and regulated in the range of 0V to 15 V, supplied with a maximum current of 1A. The schematic diagram come from circuit: Adjustable....
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This simple aerial booster circuit design might be an alternate or a hobby project for making such an aerial booster device for the Citizen Band (CB) radio..
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The circuit employs the functions of reed switches to produce a gate alarm that is powered by a universal AC/DC power supply Oscillator ...
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Alkaline Battery Charger, Battery Charger , This circuit was specifically designed to recharge alkaline cells. The unusual connection of the transistor in each charging unit will cause it to osci...
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Our reader Andrea (andrea[dot]perugia[-at-]gmail[dot] com) sent his circuit to us, and he creates the circuit for educational intent. The main purpose is to show that you can toggle an output state electronically, although physically you use only a push....
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Studying current measurement is a prerequisite for many of the measuring techniques. The current parameter mainly specifies the power consumption in a circuit, given the value of resistance. It is found convenient to measure current rather than voltage for....
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Amplifier circuit with MOSFET output stage, as a substitute for the output stage based on bipolar transistors. Advantages MOSFET Amplifier : simplicity of operation, hundreds of watts with a simple parallel, negative temperature coefficient and fast....
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It is fun to make a variable space in your small room, but it`s hard to make the actuator to move your wall or room partition. Using analog audio line delay,...
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There are some digital and analog that can be used for compensating a PT100 RTD nonlinearity. We can implemented the digital linearization by implementing the...
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line follower robot which is going to follow the line on the track. in general line follower robot is controlled by a microcontroller...
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If the sensor system need an active supply, we can use only a single pair of cable to carry both the power supply and the output signal. Not only simplify the...
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The analog display consists of a frequency/voltage converter (IC12) and bar-graph segment drivers IC10 and IC11. R34 is the calibration adjustment and is set so that an engine rpm of 5 000 to 7000 rpm lights the first LED (redline value)..
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That simple 4 digits converter circuit has OUTPUT COUNT = 1 according to my f-IMHz to 10.000. All diodes are IN4146 `POLYSTYRENE` NPO. The circuit uses the LF398 at input..
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This circuit is another radio frequency (rf) field strength meter, similar with our previous field strength meter circuit, but with lower supply voltage (only a single cell 1. 5V battery). Here is the schematic diagram of this rf strength meter circuit: To....
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This FM transmitter circuit is small, similar to our previous single chip FM? transmitter, but this FM transmitter is monophonic. You can see in the circuit`s...
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Anti-log or exponential generation is simply a matter of rearranging the logarithmic circuitry. The circuit diagram below shows the circuitry of the log...
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In this tutorial, the Arduino displays the time and date on a LCD (optional) and in the Arduino IDE serial monitor window. A PCF8563 real time clock (RTC) IC is used to generate the time and date. The time and date can be set using the Arduino serial monitor....
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First introduced by the Signetics Corporation as the SE555/NE555 about 1971. Pin connections and functions: (See schematic below for basic circuits) Pin 1 (Ground) - The ground (or common) pin is the most-negative supply potential of the device, which is....
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We can use NE556 timer IC to make indication of static of terminal in digital logic audible.? Audible logic probe can be very useful when we have to visually...
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This is a audio-controlled lamp circuit. This circuit requires low voltage input such as pre-amplifiers, tone control, or general audio line level output. It`s...
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The circuit is aimed to create a monitoring and surveillance scheme for a remote location to function as a room monitor or baby alarm with the use of an a...
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This is the circuit diagram of audio/video modulator. The circuit will convert an audio and video signal into a UHF TV signal. It`s desired to connect a video signal originating from a camera or other video source to a normal TV set. The audio and video....
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This is a circuit of Audio Decibel Level Meter. This circuit uses the SA604 which not only designed as an RF device but also the Received Signal Strength Indicator (RSSI). In a cellular radio, the radio`s microcomputer uses that function to monitor the....
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Using this circuit, you can measure the actual output power of your amplifier.? You can put this circuit in a box as a measurement instrument, or you can...
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Here is audiopreamp mic(dinamic). 200-600-ohm output impedance and low noise pre-amplifier for dynamic microphone is ideal for strengthening. This is a three-stage discrete amplifier with gain control. Alternatives such as the BC109C transistors, BC548....
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There are many low power SSB rigs and kits don`t have any real speech processor circuitry, although there is a built in speech processor in most modern HF..
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This circuit is a circuit diagram of a microphone preamp and circuits (voice circuit) has priority over any other audio signal. In its simplest form, the voice-over only the microphone unit and the change-over switch eating an amplifier, the output of the....
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This audio limiter circuit is easy to build, works with BA741 8pins or 4pins so pay attention and uses a symmetrical power supply. When the audio input lev...
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This is Auto OFF Light circuit. After the switch is pressed, the bulb is kept illuminated for a few seconds. To increase the ON time, The 10k should be...
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A circuit that can turn off head lights/lamps of a car/vehicle automatically after a preset time.This light switching circuit is built using 555 timer IC...
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Automatic headlight dimmer circuit diagram for your car`s headlight, keep you safe with maximum bright for farthest visibility, but will automatically switch ...
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Circuit of a compact and true solid-state automatic lawn light is described here. The circuit can be used to switch on incandescent garden light bulbs at...
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Voltage regulator ICs (78xx series) provide a steady output voltage, as against a widely fluctuating input supply, when the common terminal is grounded. Any voltage about zero volt (ground) connected in the common terminal is added to the output voltage.....
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The following circuit shows about Automatic Light Dimmer Circuit Diagram using 1N4007 Diode. Features: built into a wall-mounted box containing ...
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Efficient automatic solar garder lights circuit with minimum components the best deal is that is completely auto and the Solar panel acts as a light detect...
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This low cost automatic emergency lighting circuit turns on a lamp during power failures. It is powered by a NiCad battery that is being charged by the mai...
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This automatic light dimmer circuit makes it possible to control a lighting system so that it turns on or off slowly. The circuit works this way: when switch S1 is closed, the capacitor C1 is slowly charged. Once the voltage at C1 reaches 0. 6, transistor T1....
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When the switch S1 / 2 power input to the circuit C1 No. ua741. To a voltage comparison circuit. The pin 3 is the noninverting pin. for pin 2 to pin inverting. The pin 3 was divided voltage from R3 and R4. Used as a reference voltage for comparing the....
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The circuit diagram shown below appears one wire vaccum control of pneumatic locking which is popular with Jaguar, Audi and Mercedes Pneumatic..
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This simple Batteries charger circuit is designed for NiMH/NiCd batteries. It need no micro-controller nor any programming. Linear Technology Corporation...
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BC517 Bipolar Stepper Motor Control Circuit Diagram. Features: Each winding can carry a positive current, A bipolar motor has two windings ...
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This circuit uses MM74HC942, a single chip low-speed modem which is compatible with Bell 103 standard. This Bell 103 modem circuit is run at 300 baud in full...
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Here`s BH1417 USB FM Transmitter with built-in PLL circuit. Its low-frequency signal is converted into high-frequency, which can take any audio device with FM radio (stereo, car CD, MP3, DVD player, etc.), as a normal radio station. Transmitter power is....
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Switch mode circuits can implement the lead acid battery charger with a more efficient. It can be constructed using bq24105 battery charger controller. The bq24105 was originally designed to charge single-, two- or three-cell Li-polymer and Li-ion battery....
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The function for automatically control the speed of your fan according to the temperature.? Component: BT136 Triac, Capacitor, Resistor, Relay, Fan Motor, ...
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The schematic diagram below show a complete barometric pressure signal conditioner that operates from a single 1.5V battery. We can get the best accuracy and...
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The circuit diagram shows the original Kodax MAX Flash Unit including the semiconductors that built the circuit. The shown circuit diagram is the unmodified one which is for the regular Kodak and the Kodak Max that should be very similar if not identical.....
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This is The Fet Amplifier circuit. This circuit uses FET transistor. The gate of the FET must be negative with respect to the source, so a bias can be achieved in the following manner. The voltage that is across the source resistor is developed by the drain....
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This is a Basic Flash Memory Programming Voltage Supply circuit. This circuit uses LT1072 switching regulator to generate high voltage by driving the L1. R2 and...
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Here we have an astable oscillator built around 555, which gives an alarm tone of 1. 8 KHz directly driving a speaker. This is basic alarm circuit, which is later used in many other projects in the book. While the circuit shows only 1. 8 KHz operation, it....
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You can experiment with the size of the coul and the number of turns to see how it affects the frequency and signal output of the oscillator. You should be able to pick up its signal with standar FM radio receiver. The Signal In should be coupled by disc....
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As friends many take an interest the circuit about IC 555 which be integrated highly popular that circuit. I then lead the circuit sets the time be Basic...
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This circuit is a simple form of the commercial UPS, the circuit provides a constant regulated 5 Volt output and an unregulated 12 Volt supply..
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A phase-locked-loop (PLL) is a servo system, or, in other words, a feedback loop that operates with frequencies and phases. PLL`s are well known to be quite useful (powerful, in fact) in communications systems, where they can pluck tiny signals out of large....
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The following circuit shows about Bass-treble Tone Control Circuit electronic circuit diagram. This circuit based on the LM1035N IC. Features: 0. 3 Vrms input level, 80 dB Signal noise, 75 dB volume control, ±15 dB typical Tone Control, 75 dB Channel....
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LM1036 is a DC controlled tone (bass/treble), volume and balance circuit for stereo applications in car radio, TV and audio systems. Component: ...
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This circuit can be used as a low cost SRAM and Microcontroller-Microprocessor Battery Backup. All the diodes are 1N4148, The diodes prevent battery discharge back to power source. D8 gives a one way path to charge Battery thru R13 which limits current. D4....
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This is a single zone alarm - with independently adjustable Exit, Entry and Siren Cut-Off timers. It will accommodate the usual types of normally-closed input devices - such as magnetic-reed contacts, foil tape and PIRs. If you wish - you can use a mains....
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Here is a schematic diagram of electret microphone pre-amplifier using LMV721 op-amp. because the LMV721 has low noise and low power features, it would be an...
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A very simple battery charger circuit having reverse polarity indication is shown here. The circuit is based on IC L200. L200 is a five pin variable voltage voltage regulator IC. The charging circuit can be fed by the DC voltage from a bridge rectifier or....
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The schematic diagram come from circuit: Battery Charger / Power Supply 14V / 4A with MOSFET VN64GA power supply. Go to that page to read the explanation about above power supply related circuit diagram. The following schematic is a high-performance battery....
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This circuit is presented as an alternative to the IR beam break detector featured in the June 2009 issue (Silicon Chip). In order to make it relatively insensitive to ambient light, it uses a standard IR receiver IC such as the Jaycar ZD-1942. This has a....
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Using TCM3105 FSK modem chip from Texas Instruments, you can easily build a Bell 202 or CCITT V23 compatible modem. This modem circuit is capable transmitting the data at 75, 150, 600, and 1200 baud, and receive the data at 5, 75, 150, 600, and 1200 baud.....
The schematic diagram come from circuit: 60 Watt Switching Power Supply power supply. Go to that page to read the explanation about above power supply related circuit diagram. The schematic shows the power supply capacity of 70W stereo amplifier Power....
To celebrate the hundredth design posted to this website, and to fulfil the requests of many correspondents wanting an amplifier more powerful than the 25W MosFet, a 60 - 90W High Quality power amplifier design is presented here. Circuit topology is about....
This is my first successful vacuum tube project. The output of this small amplifier in which a 6V6GT output pentode is connected as triode is about 4. 5 watts. This project involves a single ended audio amplifier, which consists of a resistive input network,....
7 segment display driver circuit based on 7446. seven segment display system, 7 segment decoder/ driver . Sinking and sourcing 7 segment display driver...
The schematic diagram come from circuit: 70 W Switching Power supply with KA2S0880 IC power supply. Go to that page to read the explanation about above power supply related circuit diagram. The schematic shows the power supply capacity of 70W stereo....
This circuit is 73 MHz Hallogene Radio-Controlled Lights. The purpose is to control the power state of a hallogene light by remote control. When we press the push of a remote control Botton, state lamp power will change, so, if the lamp is lit, it will be....
The following circuit shows about 741 IC For Constant Temperature Control Circuit Diagram. Features: used to lower the drift of a Ramsey FM10a ...
This is Infra-Red Remote Control Tester circuit. This circuit is used to test go/no-go of any remote control transmitting infra-red (IR) light. The supply of this circuit is 3V battery. This circuit has some advantages, such as fits in a compact enclosure,....
The circuit is quite simple thanks to the use of MAX638CPA 5V CMOS Step Down Adjustable Switching Regulator IC. With this IC input voltage of 12 to 16 Vdc converted into direct voltage 5VDC. You can see here is only using 9 additional external components to....
The most important part of this 88-108 transmitter is the Colpitts oscillator. C3,C4,C5,C6,CD1-CD2 ans L1 determine the transmission frequency. The RF Osci...
Herein is the scematic picture of 9-Pin RS232 Line Booster Signal Direction. This device is a 9-pin RS-232 repeater that re-transmits all 8 signals and carries the ground line through..
This is a circuit of 90-125 MHz Crystal which is very useful for VHF/UHF converters. This circuit provide 5 to 15 mW output. High-quality fifth- or seventh-over-tone crystal type can be used in this circuit. Undesired oscillation never reach above 500 MHz....
This add-on board is designed to provide a pair of balanced audio outputs for the High-Quality Stereo DAC (Digital to Analog Converter). Two 3-pin male XLR connectors are used for the new outputs and they can either replace or augment the existing unbalanced....
The purpose of this circuit is to power a lamp or other appliance for a given time (30 minutes in this case), and then to turn it off. It is useful when reading at bed by night, turning off the bedside lamp automatically in case the reader falls asleep.....
One of the simplest method of metal detecting is by beat frequency oscillator. Basically, the circuit consist of two balanced oscillator. One oscillator provides the reference signal, and other oscillator is acting as the detector element. The reference....
Using the A3952S stepper motor controller designed by Allegro MicroSystems can be designed a very simple and useful motor driver circuit that can be used in many electronic applications. A3952S stepper motor controller is capable of continuous output....
The? following circuit shows about AC Motor Speed Controller Kit - K2636 Circuit Diagram. Features: normal dimmers the kit performs, with carbon ...
The high durability nature of a light emitting diode (LED) make it suitable for ON/OFF indicator application. Because the limitation on low operating voltage,...
Rejection Ratio (CMRR) which enables rejection of high frequency common-mode voltage. This will result in the rejection of higher ambient levels of noise from utility lines, industrial equipment, and other radiating sources. The following circuit diagram....
The following circuit shows about AD8531 IC For LCD Panel Backlight Automatic Control Circuit. Features: can compensate for aging effects and the ...
The ADM660 is a charge-pump voltage converter that can be used to either invert the input supply voltage or double it. The schematic below appearsADM660 Voltage Inverter Circuit Configuration Diagram. This inverting schematic is ideal for generating a....
This is a ADP1821 Step Down DC-to-DC Converter circuit. This circuit uses ADP1821 that is synchronous pulse-width-modulated (PWM), step-down controller,...
This digital-to-analog converter (DAC) integrated circuit is designed for lowest noise performance, both radiated and conducted noise. A recommendedconnection diagram for the ADV7123 is shown in the following schematic diagram. According tothe ADV7123....
signal detector electronics that can be used to detect the signal does not AF / RF. This series is very neat and easy to make...
TDA1072AT is a special purpose integrated circuit for AM radio receiver from Philips Semiconductors. The integrated circuit is designed for mains-fed home receivers and car radios. The voltage-controlled oscillator provides signals with extremely low....
The AM Transmitter circuits in two and a half, audio amplifier and an RF oscillator. The oscillator is built around Q1 and associated components. Tank circuit L1 and VC1 is melodious from about 500kHz to 1600KHz. These components can be used from an old MW....
The following circuit shows about AT90LS2323 Microcontroller Circuit Diagram. Features: 2.7 ? 6 volts, Can work in all 2323 chips. .Component: ...
Here the complete electrical circuit diagram of line follower robot which built based on ATmega16. There are three modules of line follower robot circuit that are sensor module, microcontroller module and DC motor module. Download thedocument of ATmega16....
This is the circuit diagram of Line Follower / Line Tracker robot. The circuit taken from the tutorial documentation. You may download the full tutorial at the end of this article. The line follower robot use 8 pieces of proximity sensor module. The sensor....
This is a Low-Cost Accurate Square-Root Circuit. This circuit is used to provide a square-root function with a good accuracy. The benefit of This circuit is...
Active power factor correction stabilize the electrical demand of a device to give the best power factor characteristic of many types of loads. To meet power factor regulation, a low cost solution should be designed. In many application, the need of high DC....
We aim to transmit more information by carrying articles. Please send us an E-mail to wanghuali@hqew. net within 15 days if we are involved in the problems of article content, copyright or other problems. We will delete it soon. ..
The first thing you must have in your workshop/lab is power supply. In experimenting many new electronic circuit design, it is easier if you have a flexible adjustable power supply. Here is an adjustable 0-30 volts power supply design. The circuit schematic....
This is Adjustable Constant Current Regulator circuit. This circuit can be used in a bench power supply to prevent the circuit that are tested from being...
This circuit uses the versatile MAX038 function generator. Although in this circuit some of the advanced characteristics of this IC are disabled, you can generate Sine, Triangle, Square waves (adjusting A0 and A1 pins see datasheet on if you want other....
The schematic diagram come from circuit: Adjustable High Voltage Power Supply 0 to 1000V power supply. Go to that page to read the explanation about above power supply related circuit diagram. To supply the high voltage converter suitable source of....
This battery chargercircuitis regulated and adjustable to make this circuit able to charge the mosto NiCAD battery. This circuit will work for single cell or multi battery cell which connected with series/parallel connection. The maximum voltage of the....
Adjustable Regulated Power Supply 0-15V 1A. Adjustable Regulated Power Supply 0-15V 1A. The output voltage is stabilized and regulated in the range of 0V to 15 V, supplied with a maximum current of 1A. The schematic diagram come from circuit: Adjustable....
This simple aerial booster circuit design might be an alternate or a hobby project for making such an aerial booster device for the Citizen Band (CB) radio..
The circuit employs the functions of reed switches to produce a gate alarm that is powered by a universal AC/DC power supply Oscillator ...
Alkaline Battery Charger, Battery Charger , This circuit was specifically designed to recharge alkaline cells. The unusual connection of the transistor in each charging unit will cause it to osci...
Our reader Andrea (andrea[dot]perugia[-at-]gmail[dot] com) sent his circuit to us, and he creates the circuit for educational intent. The main purpose is to show that you can toggle an output state electronically, although physically you use only a push....
Studying current measurement is a prerequisite for many of the measuring techniques. The current parameter mainly specifies the power consumption in a circuit, given the value of resistance. It is found convenient to measure current rather than voltage for....
Amplifier circuit with MOSFET output stage, as a substitute for the output stage based on bipolar transistors. Advantages MOSFET Amplifier : simplicity of operation, hundreds of watts with a simple parallel, negative temperature coefficient and fast....
It is fun to make a variable space in your small room, but it`s hard to make the actuator to move your wall or room partition. Using analog audio line delay,...
There are some digital and analog that can be used for compensating a PT100 RTD nonlinearity. We can implemented the digital linearization by implementing the...
line follower robot which is going to follow the line on the track. in general line follower robot is controlled by a microcontroller...
If the sensor system need an active supply, we can use only a single pair of cable to carry both the power supply and the output signal. Not only simplify the...
The analog display consists of a frequency/voltage converter (IC12) and bar-graph segment drivers IC10 and IC11. R34 is the calibration adjustment and is set so that an engine rpm of 5 000 to 7000 rpm lights the first LED (redline value)..
That simple 4 digits converter circuit has OUTPUT COUNT = 1 according to my f-IMHz to 10.000. All diodes are IN4146 `POLYSTYRENE` NPO. The circuit uses the LF398 at input..
This circuit is another radio frequency (rf) field strength meter, similar with our previous field strength meter circuit, but with lower supply voltage (only a single cell 1. 5V battery). Here is the schematic diagram of this rf strength meter circuit: To....
This FM transmitter circuit is small, similar to our previous single chip FM? transmitter, but this FM transmitter is monophonic. You can see in the circuit`s...
Anti-log or exponential generation is simply a matter of rearranging the logarithmic circuitry. The circuit diagram below shows the circuitry of the log....jpg "Arduino Clock Based on PCF8563")
In this tutorial, the Arduino displays the time and date on a LCD (optional) and in the Arduino IDE serial monitor window. A PCF8563 real time clock (RTC) IC is used to generate the time and date. The time and date can be set using the Arduino serial monitor....
First introduced by the Signetics Corporation as the SE555/NE555 about 1971. Pin connections and functions: (See schematic below for basic circuits) Pin 1 (Ground) - The ground (or common) pin is the most-negative supply potential of the device, which is....
We can use NE556 timer IC to make indication of static of terminal in digital logic audible.? Audible logic probe can be very useful when we have to visually...
This is a audio-controlled lamp circuit. This circuit requires low voltage input such as pre-amplifiers, tone control, or general audio line level output. It`s...
The circuit is aimed to create a monitoring and surveillance scheme for a remote location to function as a room monitor or baby alarm with the use of an a...
This is the circuit diagram of audio/video modulator. The circuit will convert an audio and video signal into a UHF TV signal. It`s desired to connect a video signal originating from a camera or other video source to a normal TV set. The audio and video....
This is a circuit of Audio Decibel Level Meter. This circuit uses the SA604 which not only designed as an RF device but also the Received Signal Strength Indicator (RSSI). In a cellular radio, the radio`s microcomputer uses that function to monitor the....
Using this circuit, you can measure the actual output power of your amplifier.? You can put this circuit in a box as a measurement instrument, or you can...
Here is audiopreamp mic(dinamic). 200-600-ohm output impedance and low noise pre-amplifier for dynamic microphone is ideal for strengthening. This is a three-stage discrete amplifier with gain control. Alternatives such as the BC109C transistors, BC548....
There are many low power SSB rigs and kits don`t have any real speech processor circuitry, although there is a built in speech processor in most modern HF..
This circuit is a circuit diagram of a microphone preamp and circuits (voice circuit) has priority over any other audio signal. In its simplest form, the voice-over only the microphone unit and the change-over switch eating an amplifier, the output of the....
This audio limiter circuit is easy to build, works with BA741 8pins or 4pins so pay attention and uses a symmetrical power supply. When the audio input lev...
This is Auto OFF Light circuit. After the switch is pressed, the bulb is kept illuminated for a few seconds. To increase the ON time, The 10k should be...
A circuit that can turn off head lights/lamps of a car/vehicle automatically after a preset time.This light switching circuit is built using 555 timer IC...
Automatic headlight dimmer circuit diagram for your car`s headlight, keep you safe with maximum bright for farthest visibility, but will automatically switch ...
Circuit of a compact and true solid-state automatic lawn light is described here. The circuit can be used to switch on incandescent garden light bulbs at...
Voltage regulator ICs (78xx series) provide a steady output voltage, as against a widely fluctuating input supply, when the common terminal is grounded. Any voltage about zero volt (ground) connected in the common terminal is added to the output voltage.....
The following circuit shows about Automatic Light Dimmer Circuit Diagram using 1N4007 Diode. Features: built into a wall-mounted box containing ...
Efficient automatic solar garder lights circuit with minimum components the best deal is that is completely auto and the Solar panel acts as a light detect...
This low cost automatic emergency lighting circuit turns on a lamp during power failures. It is powered by a NiCad battery that is being charged by the mai...
This automatic light dimmer circuit makes it possible to control a lighting system so that it turns on or off slowly. The circuit works this way: when switch S1 is closed, the capacitor C1 is slowly charged. Once the voltage at C1 reaches 0. 6, transistor T1....
When the switch S1 / 2 power input to the circuit C1 No. ua741. To a voltage comparison circuit. The pin 3 is the noninverting pin. for pin 2 to pin inverting. The pin 3 was divided voltage from R3 and R4. Used as a reference voltage for comparing the....
The circuit diagram shown below appears one wire vaccum control of pneumatic locking which is popular with Jaguar, Audi and Mercedes Pneumatic..
This simple Batteries charger circuit is designed for NiMH/NiCd batteries. It need no micro-controller nor any programming. Linear Technology Corporation...
BC517 Bipolar Stepper Motor Control Circuit Diagram. Features: Each winding can carry a positive current, A bipolar motor has two windings ...
This circuit uses MM74HC942, a single chip low-speed modem which is compatible with Bell 103 standard. This Bell 103 modem circuit is run at 300 baud in full...
Here`s BH1417 USB FM Transmitter with built-in PLL circuit. Its low-frequency signal is converted into high-frequency, which can take any audio device with FM radio (stereo, car CD, MP3, DVD player, etc.), as a normal radio station. Transmitter power is....
Switch mode circuits can implement the lead acid battery charger with a more efficient. It can be constructed using bq24105 battery charger controller. The bq24105 was originally designed to charge single-, two- or three-cell Li-polymer and Li-ion battery....
The function for automatically control the speed of your fan according to the temperature.? Component: BT136 Triac, Capacitor, Resistor, Relay, Fan Motor, ...
The schematic diagram below show a complete barometric pressure signal conditioner that operates from a single 1.5V battery. We can get the best accuracy and...
The circuit diagram shows the original Kodax MAX Flash Unit including the semiconductors that built the circuit. The shown circuit diagram is the unmodified one which is for the regular Kodak and the Kodak Max that should be very similar if not identical.....
This is The Fet Amplifier circuit. This circuit uses FET transistor. The gate of the FET must be negative with respect to the source, so a bias can be achieved in the following manner. The voltage that is across the source resistor is developed by the drain....
This is a Basic Flash Memory Programming Voltage Supply circuit. This circuit uses LT1072 switching regulator to generate high voltage by driving the L1. R2 and...
Here we have an astable oscillator built around 555, which gives an alarm tone of 1. 8 KHz directly driving a speaker. This is basic alarm circuit, which is later used in many other projects in the book. While the circuit shows only 1. 8 KHz operation, it....
You can experiment with the size of the coul and the number of turns to see how it affects the frequency and signal output of the oscillator. You should be able to pick up its signal with standar FM radio receiver. The Signal In should be coupled by disc....
As friends many take an interest the circuit about IC 555 which be integrated highly popular that circuit. I then lead the circuit sets the time be Basic...
This circuit is a simple form of the commercial UPS, the circuit provides a constant regulated 5 Volt output and an unregulated 12 Volt supply..
A phase-locked-loop (PLL) is a servo system, or, in other words, a feedback loop that operates with frequencies and phases. PLL`s are well known to be quite useful (powerful, in fact) in communications systems, where they can pluck tiny signals out of large....
The following circuit shows about Bass-treble Tone Control Circuit electronic circuit diagram. This circuit based on the LM1035N IC. Features: 0. 3 Vrms input level, 80 dB Signal noise, 75 dB volume control, ±15 dB typical Tone Control, 75 dB Channel....
LM1036 is a DC controlled tone (bass/treble), volume and balance circuit for stereo applications in car radio, TV and audio systems. Component: ...
This circuit can be used as a low cost SRAM and Microcontroller-Microprocessor Battery Backup. All the diodes are 1N4148, The diodes prevent battery discharge back to power source. D8 gives a one way path to charge Battery thru R13 which limits current. D4....
This is a single zone alarm - with independently adjustable Exit, Entry and Siren Cut-Off timers. It will accommodate the usual types of normally-closed input devices - such as magnetic-reed contacts, foil tape and PIRs. If you wish - you can use a mains....
Here is a schematic diagram of electret microphone pre-amplifier using LMV721 op-amp. because the LMV721 has low noise and low power features, it would be an...
A very simple battery charger circuit having reverse polarity indication is shown here. The circuit is based on IC L200. L200 is a five pin variable voltage voltage regulator IC. The charging circuit can be fed by the DC voltage from a bridge rectifier or....
The schematic diagram come from circuit: Battery Charger / Power Supply 14V / 4A with MOSFET VN64GA power supply. Go to that page to read the explanation about above power supply related circuit diagram. The following schematic is a high-performance battery....
This circuit is presented as an alternative to the IR beam break detector featured in the June 2009 issue (Silicon Chip). In order to make it relatively insensitive to ambient light, it uses a standard IR receiver IC such as the Jaycar ZD-1942. This has a....
Using TCM3105 FSK modem chip from Texas Instruments, you can easily build a Bell 202 or CCITT V23 compatible modem. This modem circuit is capable transmitting the data at 75, 150, 600, and 1200 baud, and receive the data at 5, 75, 150, 600, and 1200 baud.....