New Circuits Page 13
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Here is my Sputnik QSO Party transmitter prototype. The RF output power is 450mW with 70Vdc @ 14. 4mA on the V2 anode. The V2 screen (G2) current is 1. 6mA. The V1 anode current is 1. 05mA with 45Vdc @ 176uA at the screen (G2). These little vacuum tubes....
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A circuit of a remote control unit which makes use of the radio frequency signals to control various electrical appliances. This remote control unit has 4 channels which can be easily extended to 12. This circuit differs from similar circuits in view of its....
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-
ITU-R 468 is a standard relating to noise measurement, widely used when measuring noise in audio systems. The standard defines a weighting filter curve, together with a quasi-peak rectifier having special characteristics as defined by specified tone-burst....
-
Since you will be required to use buses and registers in lab 4, we will make a macro for a register that uses a 4bit bus for the data input and a 4-bit bus for the data output. You will need to make a similar macro for all your components that uses buses, so....
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Default setting for the UART is 9600 baud, 1 start bit, 1 stop bit, no parity. You can configure this paramter by placing the file "CONFIG. TXT" to the USB thumb drive. Currently only the baudrate can be configured. Example: Once the device is connected and....
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H-Bridge and Half Bridge Driver IC TLE6282G Application, Dedicated for DC-brush high current motor bridges in PWM control mode and adapted for use in injector and valve applications for 12, 24 and 42V powernet applications. Useable as four fold lowside....
-
This is a circuit schematic diagram power amplifier, the power amplifier circuit diagram using the IC TLE2141C. This power amplifier is TLE2141C IC IC type Low noise, high voltage, high-slew-rate op-amps. Frequency response 30Hz to 20KHz-1dB. You can connect....
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This is a design for simple circuit of the tilt sensor alarm presented here can be fabricated using readily available inexpensive components. The circuit is a true transistor based design. Home made Tilt sensor for this circuit is an ordinary little....
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The schematic diagram of this robot is very simple to understand. As I had mentioned earlier I just modified a circuit from on of the books to create....
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This is the diagram of VHF RF Preamp circuit 100-175 MHz with single chip MAX2633. The circuit can be used for the entire VHF broadcast and PMR band (100-175 MHz) which can be easily construct without any special test equipment. The grounded-gate....
-
This is a universal remote control I built. The entire thing was programmed with just 1KBof memory, and works with TV`s using the RC 5, RC 80, and NEC protocols (most TV`s). Its effective range is about 40m, and is effective at angles up to 60 degrees. I....
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Have you got rhythm Do you want to transfer that rhythm to your computer or hardware sequencer Probably the easiest way of achieving this is to use MIDI drum pads that can be hit with drumsticks, and the data can be stored in real time with any errors....
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This is the simple and easy way to tap current from a Motor Bike battery to charge the Mobile Phone. Most of the Mobile Phone battery pack has three 1.2 vo...
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The following circuit Shows about Stable 60 Hz Frequency Signal Generator Circuit Diagram. Features:0.068uF caps inside a feedback loop, DC-to-AC ....
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If you need a negative supply for op-amp or just need negative bias voltage while operating from a single supply voltage (for battery operation for example),...
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This Instructable will show you how to build your own FM radio receiver shield to be used with an Arduino board. The radio chip we are going to be using is the AR1010 on a breakoutboard found at Sparkfun or Electrokit and there will be code to get you up and....
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This circuit is a circuit FET Cascode Video Amplifier. The cascode amplifier FET loading the video features a very low input and feedback reduction is almost zero. 2N3823 was used because of low capacitance and high Yfs. Amplifier bandwidth is limited by the....
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The electronic lantern control circuit adds high-efficiency dimming and flashing to an existing battery powered lantern orflashlight or to a custom design. For the car it makes a great lamp for changing a flat tire, back seat reading or emergencyengine work.....
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The diagram below illustrates the high level connections required to drive a single 7-segment display on the scoreboard. The below circuit was repeated 4 times - once for each of the four 7-segment LED displays. Each circuit takes a single data line as its....
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Turn ON or OFF electrical devices using remote control is not a new idea and you can find so many different devices doing that very well. For realization of this type of device, you must make a receiver, a transmitter and understand their way of....
-
This amplifier circuit combines the LT1010 and a fast discrete stage with an LT1008 based dc stabilizing loop. A differential stage which is single-ends into...
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MMC corrupt can be caused by damaged MMC or damaged memory card driver. On the Nokia 7610, there is a memory card regulator, it is an integrated circuit and the location is near the memory card connector. Nokia 7610 memory card corrupt can be caused by....
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This circuit doesn`t work as well as it could. I made it when I had a lesser understanding of circuit design. I`ll probably make a new and improved schematic and post later on, one that has a better design. Thanks for stopping by! Note: The schematic here....
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Browse » home » alarm » circuit » explanation » latest » schematic » siren » wailing » with » latest Wailing Alarm Siren circuit Schematic with explanation *The Loudspeaker LS and the resistor marked Rx should be together 75 ohms. If you have a standard....
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Here`s a power-on time delay relay circuit that takes advantage of the emitter/base breakdown voltage of an ordinary bi-polar transistor. The reverse connected emitter/base junction of a 2N3904 transistor is used as an 8 volt zener diode which creates a....
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This circuit is connected directly to a 220V home electrical installations. LOAD on the schematic diagram above, is an electronic device with 220V AC current consumption...
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This Am radio receiver circuit is based on the TDA1083 radio IC that can be used to build a simple MF band radio. This AM radio schematic circuit based on the TDA1083 will work in 300kHz 3MHz frequency range. This AM radio receiver circuit is very simple and....
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For the past year and a half I (Mark) have been part of an Ann Arbor, Michigan based group named GO-Tech. The common thread among the group members is that each of us is interested in making things using technology (combining hardware, software, metal, wood,....
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With the preset at its max. the flashing rate of the LED is about 1/2 a second. It can be increased by increasing the value of the capacitor from 10uF to a higher value. For example if it is increased to 22uF the flashing rate becomes 1 second. There is also....
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Function: Used for measure the voltage change minute by management before the temperature diodes. Component: IC, Diode, Resistor, 3-1/2 digit LCD (SP521PR)....
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A Microchip PIC12C508 8-pin CMOS Microcontroller turns a night light on and off with preset time everyday. Save Energy, No EMI, No Battery, Built-in Lamp Fixture, and Peak Shaving It`s time for 8-pin microcontroller Microchip PIC12C508, the SAVER V3. 2, my....
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Here is a simple 12 volts DC to AC inverter circuit. This 120V AC power source is built with a simple 120V:24V or 110V:24V center-tapped control transforme....
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The monitor senses an ajar door and, if the situation isn`t corrected within 20 seconds, sounds a beeping alarm. The circuit is controlled by a magnetic reed switch and magnet on the door. With the door closed, the switch is closed and the alarm is disarmed.....
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The brightness of a fluorescent light bulb or neon tube cannot adjust as easily as that of a incandescent bulb because it starts only when a voltage is much higher than that of the network, then remains on at electrical network voltage. Normally, the high....
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On board the AVRs that can be programmed are those in the schematic. For other members of AVR family or the rest programmable ICs that Ponyprog can program, there is the J1 connector (CON10) which allows expanding the programmer`s hardware. See Ponyprog`s....
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Using LM 3909 LED flasher IC, can be designed various electronic projects. As you can see in this circuit diagram, using the LM3909 LED flasher IC can be designed a very simple color organ. All of three active filters drives the audio spectrum into three....
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-
Using this circuit, audio musical notes can be generated and heard up to a distance of 10 metres. The circuit can be divided into two parts: IR music transmitter and receiver. The IR music transmitter works off a 9V battery, while the IR music receiver works....
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It initializes a particular port for working with keypad. A global variable keypad Port must be defined before using this function. Port need to be initialized before calling this function. This function reads key when a key is pressed and it returnsnumber....
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-
A 1Hz pulse/frequency generator using the popular timer IC 555 which is wired as an Astable Multivibrator. The output pulses can be indicated visually by the LED. An Astable Multivibrator, often called a free-running Multivibrator, is a rectangular-wave....
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My beacon is using now a simple CW keying QRSS3 10140. 020 khz, power is 20 milliwatt. I`m using a PIC program PicBeacon di Ik2pcb. Click here for the reception report The idea of making this beacon start from two project, one is the Hans G0GPL QRSS Junkbox....
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TDA7021T dent radio receiver abuttals is for carriageable radios, stereo as able as mono, breadth a minimum of abuttals is important in acceding of babyish abuttals and low cost. It is actually accordant for applications appliance the low-voltage micro....
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Using the 555 timer as an oscillator in the high voltage power supply section. Can the design be changed to use an output from the micro-controller to generate an oscillating signal instead of the 555. The first question is that would such a design work If....
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This circuit connects in series with your home phone line and delivers the phone conversation through the FM band any time you pick up the telephone handset. Transmitted signal could be tuned by any FM receiver. The circuit features an "On Air" LED indicator....
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A better way to make a stepper motor controller is to make a printed circuit board, and then simply drop the components in. After making the PCB, placing the components and soldering them hardly takes any time at all, in contrast to the proto board which....
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This frequency counter uses your existing digital multimeter as the display unit that is why it can be constructed at very low cost. Due to the high impedance of most DMMs, a frequency to voltage converter can be easily connected to it without matching....
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This is a pretty simple project we are going to do. We are going to create a simple buzzer circuit where we can increase or decrease the volume of the sound that the buzzer outputs. Okay, now we can do this in two ways. We can first turn the potentiometer....
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power amplifier An amplifier designed to deliver maximum power output to a load. Example: In an audio system, it is the ....
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This unusual, simple multi-vibrator has only five components and uses neither vacuum tubes nor semiconductors but two miniature NE2 type neon lamps. This circuit interfaces best with vacuum tube or FET type high-impedance circuits. Almost any type of neon....
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This is a design circuit for amplifier was designed in order to fill the gap in the 3-10 Watts power output range of the audio amplifiers available on RED Free Circuit Designs. Therefore a simple, very low parts-count amplifier, was designed on the same....
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Even thought the power was off there was AC at the handle plug and I shorted something. I pulled it apart and found a transistor blown apart. I figured it would be an easy fix. One month, twenty plus dollars in parts and many changes of components it is....
-
This is a circuit of Voltage-to-Pulse Duration Converter. This circuit is used to convert voltage into pulse duration by combining a timer IC and an OP Amp..
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It sounds rather mysterious: a switch that is controlled by its ambient temperature. All without the touch of a human hand, except for when you re building this sort of electronic thermostat. There are a lot of handy uses for a thermally controlled switch.....
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A hifi preamplifier designed to convert high output impedance amplifiers to 600 ohm outputs....
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The Microcontroller based Water Level Controller cum Motor Protector controls on and off conditions of the motor depending upon the level of water in the over head tank (OHT), It controls water level of tank through micro-controller so that automatically....
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A while ago I got an email asking for the schematic of a circuit to detect cut phone lines. It didn`t take me long to find this circuit in Electronics Now. When the circuit detects that a phone line has been cut, it activates a MOSFET which can be used to....
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The measured resistance of door lock motor was about 2 ohm. Therefore, supplying 5V, the current becomes 5v/2ohm= 2. 5A. Regarding that the peak output current of L293B is 2A, the current flowing inside the motor is slightly over 2A, but it does not occur....
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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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Introduction The SP6648 integrated synchronous boost Regulator is a compact circuit that provides a ultra- high efficiency drive current for an LED flashlight using a LuxeonTM I light source. The circuit shown below is configured to provide 350mA constant....
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The 555 Timer shown below is configured as an 555 Astable Multivibrator previously discussed. However additional components have been added to enhance the operation of the circuit. As soon as the circuit is powered up the 555 will begin producing a square....
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The simplest solution for implementing joystick control for a robot would be to program the actions in software in a microcontroller. But, since many readers prefer off-the-shelf parts, this circuit is going to be made with diodes, resistors, transistors,....
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Wire the circuit diagram shown here on a bread board. The choice of V type of AVR is important. For example Tiny13V is very appropriate for such an ex....
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This is the figure of4Q2 DC Motor Speed Controller Circuit Block Diagramwhich is designed for full control of conventional shunt wound and permanent magnet motors up to 75kW capacity, according to the datasheet. This type ofDC motor speed controlleris....
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A peak level indicator when a signal exceeds a certain maximum value. It can be quite useful, for instance, with tape recorders, mixing consoles etc. One of the most important requirements of a peak level indicator is that it should respond to very short....
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This circuit consists of an amplifier and video detector with a second subcarrier detector for synch recovery purposes. A pulse-former circuit modulates the gain of the main channel increasing it during synch intervals...
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Most Apple and Windows PCs can be put to "sleep" or "standby" mode while not in use rather than shutting them down completely. This mode has the advantage thatwhen they wake from sleep via keyboard or mouse activation, the operating systemrestores all....
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The receiver circuit in Figure 1 sounds an audio alarm when the transmitter (Figure 2) moves beyond a designated perimeter. The transmitter, a voltage-controlled oscillator, operates at approximately 915 MHz in the unlicensed ISM....
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Even if a large number of album titles once available on vinyl are now, little by little, being proposed as CDs, not all are available and far from it. You may have treasures in your collection that you would like to burn on CDs. First, preserving a CD is....
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This amplifier circuit is suitable for home power audio devices. The STK082 amplifier specifications might lead you to believe that it can use supply voltages of up to ±43V. but I don`t recommend anything greater than ±25V if 8 ohm loads are expected,....
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The provided connections will provide configuration free usage for most Arduino boards. Some Arduino boards, such as the Mega2560, will require custom configuration. This is determined by how the ports on the Atmel AVR microcontroller are mapped to the....
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The problem with amplifying weak radio signals is that you also amplify the noise. What you can receive depends on how much background noise is present, whether it be man made interference or static. In this design the RF signal is first met by a resistive....
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The following is the diagram of 5W audio amplifier circuit which built using power transistor BD139 and BD140 as the final gaining process. This small amplifier can be used as general purpose amplifier such as computer amplifier, radio, mp3 player, video....
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The circuit is nothing but a simple transistor switch with a relay at its collector as load. The simplest electronic code lock circuit uses one ....
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I plan on building a ""high power"" amp using the KT88. Found the following circuits: 1) Which will be the better quality one to build? 2) Are ....
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Just 4 integrated circuits and an handful of passive components: the circuit of the Witnesscam is simple. The AVR ATmega32 does an excellent job here. Add the JPG camera module, a PIR sensor and a spare SD-card and you`re done!..
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The A3425 is a dualoutput-channel, bipolar Switch with each channel comprising a separate complete Hall-effect Sensor circuit with dedicated Hall element and separate digital output for speed and direction signal processing capability. The independent Hall....
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Electronics cricket game circuit shown in this website is very simple and easy to build circuit diagram of electronics cricket project various game project ...
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This be circuit warn when be become dark, or Light sensitive switch. By use electronics part the base is important , be the transistor 2N2926 and AC128. For...
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Microsemi?s LX6512 is a cost effective, Direct Drive CCFL (Cold Cathode Fluorescent Lamp) controller. The integrated controller is optimized to drive CCFL?s (Cold Cathode Fluorescent Lamps) us....
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A relay, which is energised by pulling the low side low using an NPN. I would like a pushbutton to operate the transistor (and therefore the relay) for a time (500ms ish) then deactivate it and wait for the next push (ignoring the button if held). I....
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The TDA9813T is an integrated circuit for vision IF signal processing and sound dual FM demodulation, with single reference QSS-IF in TV and VCR sets. For negative modulation standards only. ..
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Cable and xDSL modems are experiencing increasing popularity. For this reason, many designs are now required to interface with existing telephones at the subscriber`s location. The subscriber line interface circuit (SLIC) within the modem has the additional....
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This simple circuit can be wired into your headlight switch to provide automatic switching between high and low beam headlights when there is oncoming traffic. Simple electronics project with circuit diagram....
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If you want to improve your Arduino programming, creating a traffic light controller is great practice....
Here is my Sputnik QSO Party transmitter prototype. The RF output power is 450mW with 70Vdc @ 14. 4mA on the V2 anode. The V2 screen (G2) current is 1. 6mA. The V1 anode current is 1. 05mA with 45Vdc @ 176uA at the screen (G2). These little vacuum tubes....
A circuit of a remote control unit which makes use of the radio frequency signals to control various electrical appliances. This remote control unit has 4 channels which can be easily extended to 12. This circuit differs from similar circuits in view of its....
ITU-R 468 is a standard relating to noise measurement, widely used when measuring noise in audio systems. The standard defines a weighting filter curve, together with a quasi-peak rectifier having special characteristics as defined by specified tone-burst....
Since you will be required to use buses and registers in lab 4, we will make a macro for a register that uses a 4bit bus for the data input and a 4-bit bus for the data output. You will need to make a similar macro for all your components that uses buses, so....
Default setting for the UART is 9600 baud, 1 start bit, 1 stop bit, no parity. You can configure this paramter by placing the file "CONFIG. TXT" to the USB thumb drive. Currently only the baudrate can be configured. Example: Once the device is connected and....
H-Bridge and Half Bridge Driver IC TLE6282G Application, Dedicated for DC-brush high current motor bridges in PWM control mode and adapted for use in injector and valve applications for 12, 24 and 42V powernet applications. Useable as four fold lowside....
This is a circuit schematic diagram power amplifier, the power amplifier circuit diagram using the IC TLE2141C. This power amplifier is TLE2141C IC IC type Low noise, high voltage, high-slew-rate op-amps. Frequency response 30Hz to 20KHz-1dB. You can connect....
This is a design for simple circuit of the tilt sensor alarm presented here can be fabricated using readily available inexpensive components. The circuit is a true transistor based design. Home made Tilt sensor for this circuit is an ordinary little....
The schematic diagram of this robot is very simple to understand. As I had mentioned earlier I just modified a circuit from on of the books to create....
This is the diagram of VHF RF Preamp circuit 100-175 MHz with single chip MAX2633. The circuit can be used for the entire VHF broadcast and PMR band (100-175 MHz) which can be easily construct without any special test equipment. The grounded-gate....
This is a universal remote control I built. The entire thing was programmed with just 1KBof memory, and works with TV`s using the RC 5, RC 80, and NEC protocols (most TV`s). Its effective range is about 40m, and is effective at angles up to 60 degrees. I....
Have you got rhythm Do you want to transfer that rhythm to your computer or hardware sequencer Probably the easiest way of achieving this is to use MIDI drum pads that can be hit with drumsticks, and the data can be stored in real time with any errors....
This is the simple and easy way to tap current from a Motor Bike battery to charge the Mobile Phone. Most of the Mobile Phone battery pack has three 1.2 vo...
The following circuit Shows about Stable 60 Hz Frequency Signal Generator Circuit Diagram. Features:0.068uF caps inside a feedback loop, DC-to-AC ....
If you need a negative supply for op-amp or just need negative bias voltage while operating from a single supply voltage (for battery operation for example),...
This Instructable will show you how to build your own FM radio receiver shield to be used with an Arduino board. The radio chip we are going to be using is the AR1010 on a breakoutboard found at Sparkfun or Electrokit and there will be code to get you up and....
This circuit is a circuit FET Cascode Video Amplifier. The cascode amplifier FET loading the video features a very low input and feedback reduction is almost zero. 2N3823 was used because of low capacitance and high Yfs. Amplifier bandwidth is limited by the....
The electronic lantern control circuit adds high-efficiency dimming and flashing to an existing battery powered lantern orflashlight or to a custom design. For the car it makes a great lamp for changing a flat tire, back seat reading or emergencyengine work.....
The diagram below illustrates the high level connections required to drive a single 7-segment display on the scoreboard. The below circuit was repeated 4 times - once for each of the four 7-segment LED displays. Each circuit takes a single data line as its....
Turn ON or OFF electrical devices using remote control is not a new idea and you can find so many different devices doing that very well. For realization of this type of device, you must make a receiver, a transmitter and understand their way of....
This amplifier circuit combines the LT1010 and a fast discrete stage with an LT1008 based dc stabilizing loop. A differential stage which is single-ends into...
MMC corrupt can be caused by damaged MMC or damaged memory card driver. On the Nokia 7610, there is a memory card regulator, it is an integrated circuit and the location is near the memory card connector. Nokia 7610 memory card corrupt can be caused by....
This circuit doesn`t work as well as it could. I made it when I had a lesser understanding of circuit design. I`ll probably make a new and improved schematic and post later on, one that has a better design. Thanks for stopping by! Note: The schematic here....
Browse » home » alarm » circuit » explanation » latest » schematic » siren » wailing » with » latest Wailing Alarm Siren circuit Schematic with explanation *The Loudspeaker LS and the resistor marked Rx should be together 75 ohms. If you have a standard....
Here`s a power-on time delay relay circuit that takes advantage of the emitter/base breakdown voltage of an ordinary bi-polar transistor. The reverse connected emitter/base junction of a 2N3904 transistor is used as an 8 volt zener diode which creates a....
This circuit is connected directly to a 220V home electrical installations. LOAD on the schematic diagram above, is an electronic device with 220V AC current consumption...
This Am radio receiver circuit is based on the TDA1083 radio IC that can be used to build a simple MF band radio. This AM radio schematic circuit based on the TDA1083 will work in 300kHz 3MHz frequency range. This AM radio receiver circuit is very simple and....
For the past year and a half I (Mark) have been part of an Ann Arbor, Michigan based group named GO-Tech. The common thread among the group members is that each of us is interested in making things using technology (combining hardware, software, metal, wood,....
With the preset at its max. the flashing rate of the LED is about 1/2 a second. It can be increased by increasing the value of the capacitor from 10uF to a higher value. For example if it is increased to 22uF the flashing rate becomes 1 second. There is also....
Function: Used for measure the voltage change minute by management before the temperature diodes. Component: IC, Diode, Resistor, 3-1/2 digit LCD (SP521PR)....
A Microchip PIC12C508 8-pin CMOS Microcontroller turns a night light on and off with preset time everyday. Save Energy, No EMI, No Battery, Built-in Lamp Fixture, and Peak Shaving It`s time for 8-pin microcontroller Microchip PIC12C508, the SAVER V3. 2, my....
Here is a simple 12 volts DC to AC inverter circuit. This 120V AC power source is built with a simple 120V:24V or 110V:24V center-tapped control transforme....
The monitor senses an ajar door and, if the situation isn`t corrected within 20 seconds, sounds a beeping alarm. The circuit is controlled by a magnetic reed switch and magnet on the door. With the door closed, the switch is closed and the alarm is disarmed.....
The brightness of a fluorescent light bulb or neon tube cannot adjust as easily as that of a incandescent bulb because it starts only when a voltage is much higher than that of the network, then remains on at electrical network voltage. Normally, the high....
On board the AVRs that can be programmed are those in the schematic. For other members of AVR family or the rest programmable ICs that Ponyprog can program, there is the J1 connector (CON10) which allows expanding the programmer`s hardware. See Ponyprog`s....
Using LM 3909 LED flasher IC, can be designed various electronic projects. As you can see in this circuit diagram, using the LM3909 LED flasher IC can be designed a very simple color organ. All of three active filters drives the audio spectrum into three....
Using this circuit, audio musical notes can be generated and heard up to a distance of 10 metres. The circuit can be divided into two parts: IR music transmitter and receiver. The IR music transmitter works off a 9V battery, while the IR music receiver works....
It initializes a particular port for working with keypad. A global variable keypad Port must be defined before using this function. Port need to be initialized before calling this function. This function reads key when a key is pressed and it returnsnumber....
A 1Hz pulse/frequency generator using the popular timer IC 555 which is wired as an Astable Multivibrator. The output pulses can be indicated visually by the LED. An Astable Multivibrator, often called a free-running Multivibrator, is a rectangular-wave....
My beacon is using now a simple CW keying QRSS3 10140. 020 khz, power is 20 milliwatt. I`m using a PIC program PicBeacon di Ik2pcb. Click here for the reception report The idea of making this beacon start from two project, one is the Hans G0GPL QRSS Junkbox....
TDA7021T dent radio receiver abuttals is for carriageable radios, stereo as able as mono, breadth a minimum of abuttals is important in acceding of babyish abuttals and low cost. It is actually accordant for applications appliance the low-voltage micro....
Using the 555 timer as an oscillator in the high voltage power supply section. Can the design be changed to use an output from the micro-controller to generate an oscillating signal instead of the 555. The first question is that would such a design work If....
This circuit connects in series with your home phone line and delivers the phone conversation through the FM band any time you pick up the telephone handset. Transmitted signal could be tuned by any FM receiver. The circuit features an "On Air" LED indicator....
A better way to make a stepper motor controller is to make a printed circuit board, and then simply drop the components in. After making the PCB, placing the components and soldering them hardly takes any time at all, in contrast to the proto board which....
This frequency counter uses your existing digital multimeter as the display unit that is why it can be constructed at very low cost. Due to the high impedance of most DMMs, a frequency to voltage converter can be easily connected to it without matching....
This is a pretty simple project we are going to do. We are going to create a simple buzzer circuit where we can increase or decrease the volume of the sound that the buzzer outputs. Okay, now we can do this in two ways. We can first turn the potentiometer....
power amplifier An amplifier designed to deliver maximum power output to a load. Example: In an audio system, it is the ....
This unusual, simple multi-vibrator has only five components and uses neither vacuum tubes nor semiconductors but two miniature NE2 type neon lamps. This circuit interfaces best with vacuum tube or FET type high-impedance circuits. Almost any type of neon....
This is a design circuit for amplifier was designed in order to fill the gap in the 3-10 Watts power output range of the audio amplifiers available on RED Free Circuit Designs. Therefore a simple, very low parts-count amplifier, was designed on the same....
Even thought the power was off there was AC at the handle plug and I shorted something. I pulled it apart and found a transistor blown apart. I figured it would be an easy fix. One month, twenty plus dollars in parts and many changes of components it is....
This is a circuit of Voltage-to-Pulse Duration Converter. This circuit is used to convert voltage into pulse duration by combining a timer IC and an OP Amp..
It sounds rather mysterious: a switch that is controlled by its ambient temperature. All without the touch of a human hand, except for when you re building this sort of electronic thermostat. There are a lot of handy uses for a thermally controlled switch.....
A hifi preamplifier designed to convert high output impedance amplifiers to 600 ohm outputs....
The Microcontroller based Water Level Controller cum Motor Protector controls on and off conditions of the motor depending upon the level of water in the over head tank (OHT), It controls water level of tank through micro-controller so that automatically....
A while ago I got an email asking for the schematic of a circuit to detect cut phone lines. It didn`t take me long to find this circuit in Electronics Now. When the circuit detects that a phone line has been cut, it activates a MOSFET which can be used to....
The measured resistance of door lock motor was about 2 ohm. Therefore, supplying 5V, the current becomes 5v/2ohm= 2. 5A. Regarding that the peak output current of L293B is 2A, the current flowing inside the motor is slightly over 2A, but it does not occur....
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....
Introduction The SP6648 integrated synchronous boost Regulator is a compact circuit that provides a ultra- high efficiency drive current for an LED flashlight using a LuxeonTM I light source. The circuit shown below is configured to provide 350mA constant....
The 555 Timer shown below is configured as an 555 Astable Multivibrator previously discussed. However additional components have been added to enhance the operation of the circuit. As soon as the circuit is powered up the 555 will begin producing a square....
The simplest solution for implementing joystick control for a robot would be to program the actions in software in a microcontroller. But, since many readers prefer off-the-shelf parts, this circuit is going to be made with diodes, resistors, transistors,....
Wire the circuit diagram shown here on a bread board. The choice of V type of AVR is important. For example Tiny13V is very appropriate for such an ex....
This is the figure of4Q2 DC Motor Speed Controller Circuit Block Diagramwhich is designed for full control of conventional shunt wound and permanent magnet motors up to 75kW capacity, according to the datasheet. This type ofDC motor speed controlleris....
A peak level indicator when a signal exceeds a certain maximum value. It can be quite useful, for instance, with tape recorders, mixing consoles etc. One of the most important requirements of a peak level indicator is that it should respond to very short....
This circuit consists of an amplifier and video detector with a second subcarrier detector for synch recovery purposes. A pulse-former circuit modulates the gain of the main channel increasing it during synch intervals...
Most Apple and Windows PCs can be put to "sleep" or "standby" mode while not in use rather than shutting them down completely. This mode has the advantage thatwhen they wake from sleep via keyboard or mouse activation, the operating systemrestores all....
The receiver circuit in Figure 1 sounds an audio alarm when the transmitter (Figure 2) moves beyond a designated perimeter. The transmitter, a voltage-controlled oscillator, operates at approximately 915 MHz in the unlicensed ISM....
Even if a large number of album titles once available on vinyl are now, little by little, being proposed as CDs, not all are available and far from it. You may have treasures in your collection that you would like to burn on CDs. First, preserving a CD is....
This amplifier circuit is suitable for home power audio devices. The STK082 amplifier specifications might lead you to believe that it can use supply voltages of up to ±43V. but I don`t recommend anything greater than ±25V if 8 ohm loads are expected,....
The provided connections will provide configuration free usage for most Arduino boards. Some Arduino boards, such as the Mega2560, will require custom configuration. This is determined by how the ports on the Atmel AVR microcontroller are mapped to the....
The problem with amplifying weak radio signals is that you also amplify the noise. What you can receive depends on how much background noise is present, whether it be man made interference or static. In this design the RF signal is first met by a resistive....
The following is the diagram of 5W audio amplifier circuit which built using power transistor BD139 and BD140 as the final gaining process. This small amplifier can be used as general purpose amplifier such as computer amplifier, radio, mp3 player, video....
The circuit is nothing but a simple transistor switch with a relay at its collector as load. The simplest electronic code lock circuit uses one ....
I plan on building a ""high power"" amp using the KT88. Found the following circuits: 1) Which will be the better quality one to build? 2) Are ....
Just 4 integrated circuits and an handful of passive components: the circuit of the Witnesscam is simple. The AVR ATmega32 does an excellent job here. Add the JPG camera module, a PIR sensor and a spare SD-card and you`re done!..
The A3425 is a dualoutput-channel, bipolar Switch with each channel comprising a separate complete Hall-effect Sensor circuit with dedicated Hall element and separate digital output for speed and direction signal processing capability. The independent Hall....
Electronics cricket game circuit shown in this website is very simple and easy to build circuit diagram of electronics cricket project various game project ...
This be circuit warn when be become dark, or Light sensitive switch. By use electronics part the base is important , be the transistor 2N2926 and AC128. For...
Microsemi?s LX6512 is a cost effective, Direct Drive CCFL (Cold Cathode Fluorescent Lamp) controller. The integrated controller is optimized to drive CCFL?s (Cold Cathode Fluorescent Lamps) us....
A relay, which is energised by pulling the low side low using an NPN. I would like a pushbutton to operate the transistor (and therefore the relay) for a time (500ms ish) then deactivate it and wait for the next push (ignoring the button if held). I....
The TDA9813T is an integrated circuit for vision IF signal processing and sound dual FM demodulation, with single reference QSS-IF in TV and VCR sets. For negative modulation standards only. ..
Cable and xDSL modems are experiencing increasing popularity. For this reason, many designs are now required to interface with existing telephones at the subscriber`s location. The subscriber line interface circuit (SLIC) within the modem has the additional....
This simple circuit can be wired into your headlight switch to provide automatic switching between high and low beam headlights when there is oncoming traffic. Simple electronics project with circuit diagram....
If you want to improve your Arduino programming, creating a traffic light controller is great practice....
