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Demo of an easy low pass filter for the use in circuit bended toys

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Uploaded on Oct 16, 2011

A short demonstration of an easy filter circuit I've build on a breadboard. I'm looking for an easy to build one chip filter. This is a dirty circuit. I works als a normal low-pass filter. The Q-factor (resonance) has a very high gain which leads to self oscillation and creating artefact noise. The circuit is based on a LM324 chip. The filter has a Sallen-Key structure with an additional voltage feed on the gain. The video shows how to expand the filter in a circuit bending style with a 555 based LFO.

The filter can easy integrated into crackleboxes, cacophonator like boxes or build into the line out of a modified toy.

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