Repository-circuits
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20W TDA2005 stereo amplifier for all suitable applications like amplifying medium power speakers. It is suitable for car use but before, the power supply must be choked with at least 150mH and it must give up to approximately 6 to 7 amps during the upstream.... -
The main features of this powerful MULTIWATT Package (a trademark of SGS-THOMSON Microelectronics), a power amplifier IC chips designed specifically for car radio application, are the high current capability (3. 5A) and the capability to drive a very low.... -
Astable multivibrator or oscillator circuit is based on positive feedback. We can design such circuit using op-amp, logic gates, or transistors. Here we can... -
It can give ample light even for reading purpose. Capacitor CX along with diodes D1 through D4 forms the AC step down circuit. CX reduces high voltage AC from mains to a low voltage AC which is rectified by the diodes D1-D4. Capacitor C1 removes ripples from.... -
This is a 220V LED flasher circuit which is intended as a reliable replacement to thermally-activated switches used for Christmas tree lamp-flashing. This a cheap circuit and easy to build. R1_ 100K R2, R5_ 1K R3, R6_ 470R R4_ 12K C1_ 1000 F 25V D1-D4_.... -
This is a simple 220V power interface circuit. This circuit used as interface for monitoring electric devices and equipments using a computer. The circuit only... -
Here is countdowntimer24 second circuit. Thistimercircuit build for automatis on or off electronic load. Thetimercircuits uses fast 74LS schottky IC`s. A 24 second countdown starts when S3 is off and S2 is pressed. Switch S3 is used to start/pause the.... -
Here is the circuit diagram of a simple 24W mono amplifier using IC TDA1516. The TDA1516 is an integrated class B power amplifier in a 13 pin SIL package. The IC has many useful features such as short circuit protection, load dump protection, thermal.... -
This is a programmable clock timer circuit that uses individual LEDs to indicate hours and minutes. 12 LEDs can be arranged in a circle to represent the 12 hours of a clock face and an additional 12 LEDs can be arranged in an outer circle to indicate 5.... -
This is a simple Electronic thermometer circuit. This is a inexpensive circuit because probe or sensor that is used in this circuit is 2N2222 silicon ... -
Below is two single ended circuits which connected back to back give differential input. This circuit is not only has differential input feature, but also high impedance, much higher compared with the analog ammeter without this circuit. Here is the.... -
This project uses a microcontroller programmed with software that is posted on the Gerns-back BBS at 516-293-2283 as part of RUNABOUT. ZIP. The robot can be controlled via a universal remote control. .. -
2x22 W car audio amplifier circuit uses TDA1558, a monolithic integrated class-B Output power amplifier contains 4x11W single-ended or 2 x 22 W BTL amplifiers.. -
This power supply is meant as an auxiliary or as a permanent power supply for all common circuits based on a stabilized DC voltage between 3 and 30V provided that the consumption does not exceed 3A. Of course this power supply unit can also be used for other.... -
The following figure shown an example of a three-output flyback regulator built using LM2577 that has electrical isolation between the input and output voltages. The values shown in the circuit diagram will be 5V for the voltage. An electrical isolation is.... -
3.3V and 5V DC DC converter circuit design electronic project using LT3692 DC converter dual tracking regulator.. -
Here is 3 band equalizer circuit other. A tone control circuit made with a single op-amp and having three ranges, bass, middle and treble controls. Using a... -
Controlling the speed of three phase ac motor is done by controlling the frequency of the power line supply,? since the motor is synchronized with the line... -
3 to 12 volts step up DC converter using MAX668 integrated circuit design.. -
This project was a sort of challenge: designing an audio amplifier capable of delivering a decent output power with a minimum parts count, without sacrificing quality. The Power Amplifier section employs only three transistors and a handful of resistors and.... -
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. .. -
This is the schematic diagram of 300W power inverter circuit. The inverter uses power transistor MJ15003 for final amplification. You may replace the MJ15003 with 2N3773 if you have difficulty to find MJ15003 transistor. The inverter will convert 24VDC to.... -
This circuit bellow shows a teleremote circuit which enables switching ?on? and ?off? of appliances through telephone lines. Can be used ... -
Here`s a circuit diagram for setting the brightness of the light bulb. You simply use the second battery to make the fruits of this circuit works. Example usage of this circuit is to adjust the brightness of images for close-up photo shoot with a digital.... -
To reach low channel ON resistance (<30 Ohm) and low OFF current leakage, 4-channel commutator uses the 2N4091. The DM7800 voltage translator is a monolithic device. This device give us 10V to -20V gate drive to the JFETs while at the same time giving.... -
This is one of the simplest circuit for a PC parallel port based DLA. The Circuit is mainly used to protect the port which is fabricated on the motherboard itself.. -
4 Channel Infrared (IR) Remote is a simple kit using the famous HT12A and HT12D encoder / decoder chips from Holtek... -
The 555 circuit below is a flashing bicycle light powered with four C,D or AA cells (6 volts). Two sets of 20 LEDs will alternately flash at approximately 4.7 cycles per second using RC values shown (4.7K for R1, 150K for R2 and a 1uF capacitor). Time.... -
This 40KHz crystal controlled oscillator circuit drives an infrared LED with powerful 40ma pulses.. -
This circuit was originally designed to detect weak flashed of laser light bounced off of a fabric video projection screen. It was used as part of a firearm training system. It generates a 100mS output pulse whenever it detects a 3ms to 5ms-laser burst,.... -
This 40V dual power supply circuit was designed in response to a request made by Michael from Philippines. His application is to power the 150 Watt amplifier circuit published here. I think this power supply design is adequate for the purpose. The.... -
This power factor controller accept voltage from 90 to 268 Vac, that`s why we call it power factor controller with universal input, since any standards of mains supply in almost any country would fall within that range. This power factor controller is....
New Circuits
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This project fits more for custom made battery casing that can have more space to hide things inside. This switch with few alterations can be used for any other project as well but is designed based on e-bike needs! This project use a clever functionality of.... -
The circuit described here uses ultrasonic oscillations and operates based on the propagation velocity of these oscillations in the air. Thus, we can easily determine the distance of two points if the time within which the wave travels this distance is.... -
Sometimes the precious metals are hidden too deep and are not detected except with complicated devices. In many cases, however, small pieces of precious metal buried near the surface can be detected by relatively simple means. Everyone is very attractive to.... -
Many times for various reasons we forget or can not water the plants that we have in our homes. And many humidity sensors units just notify us with a beeping sound or with a flashing light, that the pot needs watering. But what if we are away from home? This.... -
The principle behind a metal detector is really very simple. Proof of this is the circuit that follows, in which it proves that the construction of a metal detector can be done in the minute, with few components that we find very easily everywhere. With the.... -
The sub-harmonic bass generator is a sound producing unit for guitars. The sound it produces looks very much like that of the bass guitar. The octave generator is sometimes quite unusual since it does not produce any of the usual ways of coloring the sound,.... -
In the past the sounding (sea bottom measurement) was done with the "bullet", that is, with a heavy lead object that the seamen plucked into the sea hung from a calibrated rope. As soon as the "bullet" reached the bottom, the depth appeared directly from the.... -
This Amplifier was designed to have the following specifications: Distortion less than 0.1% at full power of 100W even at 20KHz. Power has to be attributed to an extended bandwidth. The output transistors must be protected against short circuits. The power.... -
A series of LEDs serve to alert the gardener when plants need water. Using two conventional digital integrated LEDs and a series of LEDs, we make a very useful device for gardening. The device detects the amount of water in the pot and alerts the grower.....
Popular Circuits
This unit uses switches and resistors to provide a number of current ranges. It allows you to...
The circuit includes a low-distortion, 1-kHz oscillator and will measure THD at a user selected...
The chip in the middle with the tiny bullet holes in it is almost certainly proprietary. At best...
This year for Valentine`s Day I decided to get nerdy and make something electronic for Caroline....
This design will interest technicians who work on pneumatically operated valves and other 4-20mA...
A series resistor, and a bypass capacitor along with a zener in parallel with the hall sensor to...