…than is needed to drive a 3-ohm speaker. The gain may be pre-set for a variety of input levels, making it suitable for amplifying computer and cassette-deck Line-output levels. The…
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Car Horn
…necessary for your timing resistors are obtained by wiring two common worth resistors in series. The square wave frequencies produced by IC1 (440Hz) and IC2 (523Hz) are mixed via R5…
Electro Harmonix Graphic Equalizer
…combination versus the frequency. For the op-amp, you can use op-amp IC TRX6221, NE5532 or LM833. Use regulated power supply and high quality components to obtain the quality audio output….
Good Quality 500M FM Transmitter
…coil L1 and variable capacitor VC1. Decrease the value of VR2 to obtain a higher power output. The next stage is designed close to transistor BC548 (T2), which serves to…
Electronic Stopwatch
The above simple circuit design can be utilized as an accurate stopwatch to count up to 100 seconds with a determination of 0.01 second or up to 1000 seconds with…
400W RMS Stereo Power Amplifier
…and a high fidelity with low noise, to obtain the 400 watts we can put 2 speakers of 4 Ohms or 4 of 8 Ohms. The circuit require symmetrical power…
50W Power Amplifier with IC TDA7294
…Suggested power supply for this audio amplifier: Download the explanation of this amplifier circuit in pdf format: [wpdm_file id=57] Download TDA7294 Datasheet: [wpdm_file id=56] Source: kitrus.com Kit version of the…
250mW RF Power Amplifier
…power amplifier circuit is available at kitsrus.com. You may download the kit manual including the information of schematic diagram, components list, and circuit works from the following link: 250mW RF…
DC Motor Speed Controller
…buy the circuit from electronickits.com Download the manual including the circuit diagram, parts list and the complete explanation (PDF file): DC Motor Controller Project Kit 1 file(s) 126.95 KB Download…
Automatic 9V Battery Charger
…pretty impressive and perhaps a bit complex, it’s actually not difficult to understand. The circuit needs to be hooked-up to a DC supply voltage of between 16.5 and max 17.5…