Device0038

This design has since evolved into the Auto-Step Synthesizer. The circuit itself is the same.

This is based on a stepped-tone generator. What makes it different is the built-in sweeping LFO that gives it an almost automated effect. As well as a low-pass filter that allows you to sweep the high-end in or out.

You have controls for LFO speed, frequency, pulse length, lo-pass filter, and volume. The case is an old repurposed wooden box and some salvaged parts were used.

Audio Out: 1/4″ mono
Power: 9V Battery or 9V DC Adapter