I don't know what you would call this circuit, but it's designed to turn a piezo signal into a ON/OFF signal. This is for a kick drumpad.
I'm fairly sure I have it built correctly according to the diagram and real world tests confirm it's functionality as perfect, but since I don't fully understand it I'm not sure if it's supposed to be inverting the output or not. I would tend to think it shouldn't.
Best I can do to replicate the piezo source is use an AC source.
R1 -used to control main pad sensitivity.
R4 - used to adjust kick pulse duration. Also used to control with rebound hits, so multiple hits aren't registered from a single kick.
Attached is my circuit with scope, and the original circuit.
Can anyone see why this would invert the output? and why the op-amp seems to turn the AC signal into a square wave? (I think it's supposed to)
I'm fairly sure I have it built correctly according to the diagram and real world tests confirm it's functionality as perfect, but since I don't fully understand it I'm not sure if it's supposed to be inverting the output or not. I would tend to think it shouldn't.
Best I can do to replicate the piezo source is use an AC source.
R1 -used to control main pad sensitivity.
R4 - used to adjust kick pulse duration. Also used to control with rebound hits, so multiple hits aren't registered from a single kick.
Attached is my circuit with scope, and the original circuit.
Can anyone see why this would invert the output? and why the op-amp seems to turn the AC signal into a square wave? (I think it's supposed to)
Attachments
-
168.9 KB Views: 37
-
56.4 KB Views: 27