Category Archives: Signal Processing

Pulse Width Modulator Using 555 IC

Posted on May 20, 2009 by Adam
pulse-width-modulator-555

A very simple pulse modulator circuit can be built using 555 IC. In 555 chip, a special modulator input is available at pin 5. Here is the schematic diagram of circuit: This pulse modulator circuit need an external clock signal … Continue reading →

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Self Powered Compressor

Posted on May 8, 2009 by Adam
dynamic-compressor-powerless

The most unique feature of this dynamic compressor circuit is that it needs no power supply, looks like  as passive connector or adapter cables. The attenuation is good enough, about 20dB, works for  input range of 100mV to 10V signal … Continue reading →

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