New Circuits Page 151
- Page 151
-
The circuitry for the tone detector, solenoid driver, and motor speed control (paper transport and spindle) is rather straightforward. A solid-state implementation of the driver circuit typically needs a diode (installed with reversed polarity) across the....
-
-
Building your own ipod FM radio transmitter. It works quite easy, there is a power switch on the bottom to turn it on and tune your radio and transmitter to the right frequency. For the antenna you can use a copper wire of 70 cm. The range of this FM....
-
This circuit was designed to allow a laptop computer to be powered from a solar power setup. The computer requires 12V at 3. 3A. The circuit is a linear regulator with Mosfet Q4 as the series pass device. A 100kO resistor provides Q4 with a positive....
-
In this article I will offer driver circuit for 12 V/5Watt fluorescent lamp, this circuit used a normal 220 to 10V stepdown transformer in reverse to step 12V...
-
This circuit uses a 555 timer to generate a sawtooth voltage waveform across a capacitor, then compares that signal against a steady voltage provided by a potentiometer, using an op-amp as a comparator. The comparison of these two voltage signals produces a....
-
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. ..
-
-
Conexants CX24501 is a highly integrated, MPEG-2/H. 264/VC-1, DIRECTV/DVB compliant, back-end decoder IC solution for high-definition digital TV which CAN be deployed in digital satellite, cable, Telco or terrestrial TV networks. By Conexant Systems, Inc. ..
-
Make a 555 timer base circuit such that O/P pin of 555 is held LOW by default at power on, and the I/P pin is held initially at HIGH at power on. The main requirement of my circuit is that until I/P pin is held LOW for say 200ms, then only the O/P pin must....
-
-
Fact is that the Nixies need a particular cathode current to entirely light up the cathode at all. If you just reduce the anode voltage the current through the anode resistor drops and so does the cathode current. Up to a certain point where the cathode is....
-
A servo motor uses servoG‚ mechanism, which is a closed loop mechanism that uses position feedback to control the precise angular position of the shaft. Stepper Motors, which is an open loop system can also be used for precise angular control. But Servo....
-
-
Below shown circuit will be automatically switched ON and OFF during night and morning times respectively. In above circuit R1 can be used to adjust the sensitivity. And the working of the circuit is very simple. The LDR will have very low resistance during....
-
A number of shunts and multipliers selected by a switch can be used in association with a single basic meter to form a multirange instrument, known as a multimeter. this is capable of measuring volts, current and resistance. A multirange meter can be....
-
Small 1. 5V to 5V or 12V DC/DC converter with LT1073 chip. The IC is available in three different versions, depending on output voltage. Two with fixed output voltage of 5V and 12V, and the most interesting that can be adjusted. The adjustment is done....
-
Both versions have the schematic attached. However, the resolution of the schematic isn`t that great. I would recommend saving the image above or downloading it from HERE to ensure you can see everything accurately. There isn`t an easy way to shield yourself....
-
Using AD9284 with the interface of adl5380 demodulator. I tried to work in default mode of AD9284. I have checked I and Q outputs of demodulator and everything was fine there. When i checked digital outputs of AD9284, I could not see the desired output. So,....
-
The design of this project depends on the sensors. The control module and the robot both contain sensors. The computer, in turn, analyzes the signals to make the appropriate output actions. As previously mentioned, the potentiometers are the sensors on the....
-
-
This circuit shows a CA3256 switch/amplifier connected for a direct-coupled output. One of four channels can be selected in parallel with channel 5. The analog switches of channels 1 to 4 are digitally controlled by logic (Fig. 3-35B). A VEE of -5 V is....
-
-
This is a new design of a tutorial board based on the popular PIC16F84A microcontroller. It features eight single leds, a 7-segment display, an LCD display and five push buttons. It is an ideal solution for the beginner to take his/her first programming....
-
The principle is that the resistance of metals increases at higher temperatures and a heated wire suspended in a gas will lose heat by conduction and convection in proportion to the number of gas molecules present; the heat loss is thus proportinal to....
-
A admirable diy gsm jammer or cellular adaptable buzz jammer schematic diagram for use alone in GSM1900 with abundance from 1930 MHz to 1990 MHz. The GSM1900 cellular corpuscle buzz arrangement is fabricated use of by USA, Canada and best of the nations in....
-
On many cars, the boot light will not go out until the lid is properly closed. It is all too easy when unloading the car, to leave the lid ajar. If you are unlucky and the car remains unused for some time, the next time you try to start it, the lamp will....
-
Ignore components C1, C2, R3. The MOSFET, Q1, switches on creating a short circuit between the right hand side of the inductor, L1, and 0V. Thus a fixed voltage of 3. 3V is applied across the inductor, so its current will ramp up according to When the MOSFET....
-
The first time you sign into developerWorks, a profile is created for you. Select information in your profile (name, country/region, and company) is displayed to the public and will accompany any content you post. You may update your IBM account at any time.....
-
Before we describe how it`s done, note that we recommend that the result be checked as having sufficient brightness for a stop & tail-light application. That`s because the light output may be inadequate, depending on the tail-light lens and reflector....
-
You will get this done in 30 min. Step 1: Parts 1. 1 X any type of circuit board 2. 1 X Atmel AVR Atmega16 microcontroller 3. 8 X 330 ohms Resistors 4...
-
The OP07 is in a non inverting amplifier so as not load the mV of thermocouple, the zeners are to protect circuit if junction contacts heaters or the earth gets broken. The RC is to filter out 50Hz pick up in thermocouple wires if near heater wiring and also....
-
An op amp used as a comparator produces a 10-V p-p square-wave output with 100-mV input, to 15 kHz. Adjust R5 for symmetry of square wave at low input levels..
-
The basic circuit illuminates up to ten LEDs in sequence, following the rhythm of music or speech picked-up by a small microphone. The expanded version can drive up to ten strips, formed by up to five LEDs each, at 9V supply. IC1A amplifies about 100 times....
-
-
This is a very good integrated circuit. There is no need for any external glue logic to drive the circuit, there is only 2 pins to drive the motor, one for controlling the direction and the other to trigger the stepping pulses. It provides a very compact....
-
The circuit diagram shows a regular charger being powered by an AC input source, intended for charging batteries. This type of rechargeable batteries are....
-
A while ago, as my first microcontroller project, I made a Pong game on a 5G—7 LED display, but then nothing became of it. Recently I was given a hard hat as part of a uniform (for an engineering competition) and told to customize it, and remembered pong.....
-
-
I want to simulate 27MHz transmitter circuit in PSPICE. Circuit diagram is given as Figure-1 in following....
-
-
Using this schematic electronic project can be designed a very simple water level indicator electronic circuit that uses a 7-segment display to indicate the water level (low, half and full)in the tank. This water level indicator electronic circuit shows the....
-
The TDA8340 Q and TDA8341 Q are integrated IF Amplifier and Demodulator circuits for colour or black/white Television receivers, the TDA8340 Q is for application with n-p-n Tuners and the TDA8341 Q for p-n-p Tuners The TDA8340 Q and TDA8341 Q are....
-
This is one of the smallest and neatest FM transmitters to be presented as a construction project and it has the advantage of being available as a complete kit of parts. This will save going to a number of suppliers as no single supplier has all the....
-
The circuit presented here is intended for charging NiMH batteries. The MAX712 IC used here contains all the necessary functionality to make sure that this happens in a controlled manner. Figure 1 shows the schematic of the charger. The heart of the circuit....
-
circuit diagram of a modulator circuit in a transmitter and receiver of a amplitude modulation...
-
Details the AT Keyboard Interface and AT Keyboard Protocols. Includes an example Keyboard to ASCII decoder using a 68HC705J1A MCU....
-
-
The leads from the transformer to the circuit are quite long (>5m). Apparently the 110V side of the transformer was switched off somewhat frequently lately which likely caused a spike on the secondary (24V) side. The input pin of the LTC3631 has a visible....
-
The applications described in this document are applications for driving high power LED diodes. The described circuits can be applied on other applications with similar circumstances as well, in case they fall within the specifications of the MLX10803. This....
-
The loop can be any type of hookup wire, with a maximum resistance of about 90K. Using very thin wire (40AWG, for example) will make a very sensitive trip wire, but will shorten the distance it can be strung due to the high resistance...
-
-
An AM modulator for the MW band that will allow hearing the music of a CD or MP3 player during daytime on such radios. This is not a transmitter: the output power is very low (only 10mW) and is intended to be connected to the antenna input of the radio, or....
-
A low-distortion Meacham-bulb-stabilized Wien-bridge oscillator is used to acquire the FFT of a pure sinusoid of about 5 kHz....
-
Here you can get the circuit diagram of ohm meter for a low resistor measurement. More about you can find 300+ electronics circuit in this site..
-
This circuit was designed for use in a hifi showroom, where a choice of speakers could be connected to a stereo amplifier for comparative purposes. It could be used for other similar applications where just one of an array of devices needs to be selected at....
-
The frequency to voltage converter circuit illustrated in the schematic diagram below produces a 10 V output for 10 kHz full scale input (square waves or pulses). The simplicity of the circuit doesn`t mean a bad performance: this circuit has linearity about....
-
The 555 on the right is wired as an alarm sound generator and the second 555 timer on the left is a 1 Hz astable multivibrator. The output of the left timer is to modulate the frequency of the right timer. This process will cause the right timers frequency....
-
A simple way to build a battery-powered RS-232 receiver circuit is shown on the following schematic diagram. This circuit convert RS232 level to TTL level....
-
digital red light jump checking system with RF transmitter. By implementing this project we can trace the red light jumping car with number and the time..
-
Diploma Final Year Project represents the culmination of our learning process, where it is a must to put into use from previously learned engineering and personal skills. The assessment has a major influence on decisions regarding readiness to graduate. This....
-
This 9-minute timer switch can be used to control the light in a toilet or bathroom. The timer is started by pushing S1 and stopped by pushing S1 again. If you forget to turn it off, the controlled light will go off after nine minutes. If you need the light....
-
I usually can`t hear the doorbell when I`m in the basement. This project describes how to add an inexpensive remote doorbell to your existing household doorbell. My doorbell runs off of a 24VAC transformer that is live all the time. Someone presses the....
-
Here s the design circuit for pulse position modulator can be easily built using 555 IC. Here s the figure of the circuit; .Pulse position modulator modulate the on-period while keeping the fixed off-period. Pulse position modulation might subs ....
-
Make yourself this simple dc to dc mobile battery charger and charge your mobile phone battery whenever and wherever you want, simply by connecting it to a 12 volt source from your car or motorbike battery....
-
How to make a simple kirlian effect camera for photographing high voltage corona around objects. Otherwise known as aura photography....
-
This circuit is intended for alerting purposes after a certain time is elapsed. It is suitable for table games requiring a fixed time to answer a question, or to move a piece etc. In this view it is a modern substitute for the old sandglass. Useful also for....
-
Digital output from a microcontroller is typically a low-amperage signal. For example, when you put a pin HIGH on the microcontroller (in Wiring/Arduino, it`sG‚ digitalWrite(somePin, HIGH); ), the voltage coming from that pin is typically +3. 3V or +5V, and....
-
As shown, the circuit is powered by a 9-V battery, B1, but it can easily run off any 7- to 10-Vdc power supply. At the heart of the thermometer is IC1, an LM34 temperature sensor. That device produces a voltage between the Vout and GND terminals that is....
-
A demo of external interrupts in AVR (Atmega8) micro controller with circuit diagram and C code/program as ISR (interrupt service routine)....
-
The first circuit was designed for the situation where a hijacker forces the driver from the vehicle. If a door is opened while the ignition is switched on - the circuit will trip. After a few minutes delay - when the thief is at a safe distance - the alarm....
-
Using this simple circuit, you can make an 18 LED flasher to decorate the X`Mas Tree. The White, Blue and Red LEDs flash at different rates to give a colorful display. It is a light sensitive circuit so that it will turn on in the evening Using this simple....
-
-
This circuit could be regarded as a simple alternative to the Sooper Snooper device featured elsewhere in this issue. It is based on the PreChamp preamplifier featured in the July 1994 issue of SILICON CHIP. It can be used to pinpoint or locate sounds coming....
-
-
This simple circuit produces a beeping sound that lasts for around 3 seconds whenever you make a whistle. The CMOS Hex inverter CD4049 is the heart of this circuit. Out of the six inverters in CD4049, U1a is wired as an audio amplifier which amplifies the....
-
Build the tiny stripboard relay shield for Arduino. View the circuit diagram and download the software. Control two relays from your PC and use your PC to switch things on and off....
-
Here is verified circuit of simple, interesting and inexpensive electronics clapper (sound generator) circuit diagram with description of electronics clapper...
-
1999 Buick Regal. Instrument panel lights have failed. Examined fuses related and even those not related to lighting and have found no bad fuses. Is there a CB behind the headlight/interior light switch that can be reset. What I would do first is turn on the....
-
-
Nearly always when a remote control doesn`t work, the underlying problem is elementary: the unit does not emit light. The cause may be dry solder joints, defective LEDs etc. , but also a flat battery (perhaps due to stuck key). The human eye is unable to....
-
-
4 Stage FM transmitter circuit diagram. It uses four radio frequency stages: a VHF oscillator built around transistor BF494 (T1), a preamplifier built around transistor BF200 (T2), a driver built around transistor 2N2219 (T3) and a power amplifier built....
-
-
A simple non-commercial grade multiplexer compatbile with telephones. It will supports 4 telephone lines, and will multiplex over one cable. The topic was free of choice, but had to be oriented aroudn the theme of "PrG©vision" (prediction). As you may have....
-
-
Speaker relay delay controlling circuit for audio amplidier..
-
The circuit described here can create three different US-style` siren sounds: police, ambulance and fire engine. The desired sound can be selected using switch S1. The circuit can be used in toys (such as model vehicles), as part of an alarm system, and in....
-
A very good quality and simple intercom circuit using only three transistors. By pressing the switch S2 the circuit will generate ring signals. For making two way intercom make two identical circuits and combine them as shown in diagram 2. The current....
-
This basic VCO/waveform generator IC circuit includes a voltage follower loop (formed with IC1) and symmetry feedback loop (IC3) to eliminate an asymmetric duty cycle, which would cause distortion at low frequencies. Fig 2. The VCO used in this circuit....
-
-
-
Integrated solution for two output channels simplifies design and enhances reliability The device, the VNI2140J, integrates on-chip two 45V Power MOSFETs channels (80mOhm typical Rds(on) at 25....
-
-
This circuit controls resistive and inductive loads up to 2, 500W. It`s main functional device is an integrated phase control circuit - Siemens TLE3103. It contains its own power supply, a zero voltage crossing detector circuit and a logic driver. An....
-
The designer is seeking the solution with higher efficiency, with lower power consumption, in the hope of reducing the needless energy loss. Utilize syntony inductance to shake the capacitive LLC syntony converter harmoniously, use the zero voltage switch....
-
Most off-the-shelf car battery chargers cannot not be left connected to the battery for long periods of time as over-charging and consequent battery damag....
-
-
This project was on my list for a while. The main reason was that the winch on the Jeep is permanently connected to the battery. So every nut job in a parking lot could just stick a paper clip into the winch remote and play with the winch, or worse, shorten....
-
Many times we needed to use a simple circuit of preamplifier, with few components and facility of made. This circuit use a opamp. the Motorola, TCA5550, that contains a double amplifier, as outputs for the adjust of volume, balance, treble and bass. These....
-
A new generation of intelligent, scriptable sensors/controllers is around the corner. Up to date, the classical approach at the heart of many simple machines consisted of separated thermometer and control units. By contrast, my design is a unified....
-
Most electric kettles do not produce a whistle and just switch off when they have boiled. Fitting a box of electronics directly onto an electric kettle (or even inside!) to detect when the kettle has boiled is obviously out of the question. The circuit shown....
-
The microcontroller won`t be able to drive the gate of Q1 very hard (usually GPIO pins can only source a few milliamps) so your turn-on and turn-off will be very slow. This will limit how well your high-side switch will behave. You don`t have a....