square wave oscillator circuit

Posted on Feb 6, 2014

This is a square wave oscillator (digital, like 8-bit music). It`s based around the LM386 amplifier I. C. , which is what the mini guitar amplifier was based on. It has a simple power switch connected to the battery, a potentiometer for adjusting the tone, and a normally closed momentary switch. The momentary switch is connected to the signal output

square wave oscillator circuit
Click here to download the full size of the above Circuit.

. It`s normally closed so when you press it, the signal is cut off but when you release it, the signal passes through again to your amplifier. This can create some cool sounds. This is a diagram showing the components wired to the I. C. The red x`s indicate places where the wires don`t connect and the black dots indicate connections. Feel free to download the image here. This second video contains another square wave oscillator but with keys to jump to different tones and a potentiometer to adjust the overall tone. The keys are actually normally closed momentary switches. A resistor is connected to each switch so when it is pressed, it generates a tone. It`s hard to explain here so I`ll try to explain it later or in a video.

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