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  • 177 x DIY Audio Projects

    Browse through a total of 177 Audio amplifiers, filters, generators, mixers and audio preamplifier circuits. Huge collection of audio projects, kits and the circuits schematics for diy easy-to-build audio kits.

    2N3055 circuits   audio amplifiers   audio compressors   audio equalizers   audio filters   audio generators   audio indicators   audio mixers   audio preamplifiers  

    TPA3122D2 Class D Audio Amplifier TPA3122D2 IC is used as a class D audio amplifier and can deliver up to 15W of power at 10% distortions. The real advantage of using a class D amp, especially TPA3122 is the fact that this IC doesn’t need a heatsink because it has a high efficiency. Another great thing about it is that you can buy a $20 built-it-yourself...
    Common Emitter Amplifier in PartSim PartSim is used in this example to simulate the Common Emitter Amplifier. The base bias voltage is set with the voltage divider arrangement. The input signal is amplified by the 2N2222 NPN transistor. Coupling capacitors are used to separate and block any DC component from the AC signals. Also shown is a bypass capacitor CE...
    Funny Micro-Synthesizer If you are looking for an easy-to-build microcontroller-based sound generator capable of making some amazing, raw synth tones, here is a funny micro-synthesizer/noisebox project to quench the thirst. It’s an extremely simple circuit with an ATmega8 directly generates audio with a little external circuitry. However, since...
    Classic Tone Control Circuit with Low Noise Transistor Tone control is a type of equalization used to make specific pitches or “frequencies” in an audio signal softer or louder. A tone control circuit is an electronic circuit that consists of a network of filters which modify the signal before it is fed to speakers, headphones or recording devices by way of an...
    Audio Preamplifier for PA system An audio preamplifier is to be developed for use in a small portable public address (PA) system. The preamplifier will have a microphone input, and its output will drive a power amplifier. A block diagram of the complete PA system is shown in the figure (http://www.digikey.com/schemeit/#ign). The dc supply voltages are...
    Portable Morse Code Practice Oscillator Little circuit of a Morse Code Oscillator is presented here. Excellent for learning and teaching Morse code, this code practice oscillator – ideal solution to practice sending the code and improve your speed – is a light-weight portable unit powered by one AA cell (1.5V/1.2V) and is based on the well known...
    Muting Transistor Attenuator Circuits and the 2SC2878 Among semiconductors, the muting transistor and its audio application is perhaps the most obscure and poorly understood of all. There is extremely little information on this subject available on the internet and what is available is sketchy. This discussion is an attempt to tie the pieces together and to add some insight –I...
    CMoy Headphone Amp The CMoy headphone amp is a popular headphone amplifier that is small enough to carry everyday and powerful enough to drive headphones at higher levels than normal. Most headphones and most sources will get along ok, but there are players with weak output, and high end headphones typically give up efficiency for the best...
    Hybrid Headphone Amp Potentially, headphone listening can be technically superior since room reflections are eliminated and the intimate contact between transducer and ear mean that only tiny amounts of power are required. The small power requirement means that transducers can be operated at a small fraction of their full excursion capabilities...
    Audio Compression Amplifier /AGC This is an audio compressor/AGC (automatic gain control) with an astonishing 75db input voltage range. A P-Channel JFET is used as a variable resistance element that is applied as a variable attenuator. Distortion is minimized by keeping the signal voltage across the JFET extremely low (1.3mV). This is an improvement over...