LM386 Square-wave Oscillator abram, June 13, 2011August 31, 2017 Here’s a small LM386-based square-wave oscillator built from the following schematic. I replaced the 30k resistor with a 50k Potentiometer from my stash of parts which then, of course, acts as a pitch controller. The following audio is some track recordings made in Ableton 8.0 with a little filter on one track and some reverb the air-raid siren sounding noise. http://abrammorphew.com/notes/wp-content/uploads/2011/06/lm386_osc_demo.mp3 Related notes audioelectricalLM386oscillatorsquarewave