Circuit Lake

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The project used interesting approach for reducing speaker distortion and increasing bass response. A dual coil speaker driver is used but only one of the coils is connected to the power amplifier – the other is used for electromotive feedback. This method is not new, but is difficult to implement in pure analogue world [...]

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Spectrum analyzers are employed in most of the modern signal processing systems for measuring the distribution of signal energy in frequency. An audio spectrum analyzer is used for measurements in the audible frequency spectrum (from 0 to 20000 Hz) and can be a very powerful tool for keeping a studio well tuned. A Digital, [...]

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The aim of this project was to add remote-control convenience to the hi-fi preamp without compromising sound quality. It replacing the existing volume control with high-quality optical rotary encoder controlled by PIC 16F877. The project has 7 input sources and 5.1 surround sound.

This Audio Spectrum Monitor project use SG12232C graphic LCD to display an audio wave forms in real-time like a digital oscilloscope. It also features a FFT spectrum analysis too. This can also be applied to radio frequency band. As main processor, the project equipped with Microcontroller AVR ATmega8. These are some wave forms that can [...]

This is a Surround Processor Project with the digital delay method created by Chan. This audio processor only uses general purpose ICs that easy to find. The type of this Surround Processor is generating the surround effect with processing two channels of stereo source. Most of those are generates the surround effect with separates reverberations [...]

If you interested to build TV transmitter for your electronic project task or hobby, this Advanced Tv Transmitter With Sounds designed by Tetsuo Kogawa could be good idea for you.
The project schematic consist of of the two sections: video transmitter and audio amplifying. Both of them actually is transmitters. The main one generates video carrier [...]

The Super Ear is an ultra high gain stereo audio amplifier! And when we say high gain, we mean it! It boosts audio 50 times and you can listen to it in stereo besides! Miniature high sensitivity microphones are placed at 45 degree angles to give you maximum separation. This little kit also includes an [...]