Final Project Report

Success! After encountering more than a few issues, I finally got the basic function of my circuit to work. Before, I had the piezo affecting the signal of the oscillator, but instead of the oscillator's gain being controlled by the piezo, it would create a dip in the amplitude of the signal when I tapped its surface. It turns out that I just needed to put a large resistor to ground after the piezo output to get it working. After figuring this out (with Steven's help), I added an audio input and a switch so you could use the piezo as a trigger for bursts of input audio. I actually think this sounds a lot cooler than my oscillator, and it's a pretty interesting sounding effect. Unfortunately, at higher frequencies, it seems like a small portion of the oscillator signal comes through, which is kind of annoying. Also, I tried adding simple high pass and low pass filters after the output from the H1F11, but for some reason this made H1F11 stop working, and the piezo no longer had any effect on the signal.

Here's a video of my project working