Electronics Technology Lab Report Number 3

Experiment:
For this experiment I ran different frequencies through the circuit which is diagramed above. The circuit seems to have a treble roll-off effect as you can see in the graph of the amplitude response to change in frequency, as the frequency gets higher, the amplitude of the signal drops off. When you listen to white and pink noise through the circuit, the effect is the same, the higher frequencies are cut out while the lower frequencies stay constant when compared to the unprocessed signal. The capacitors I used in the circuit were what caused this amplitude drop at higher frequencies, but my results are actually quite strange as capacitors with lower values (like the 1uf ones in my circuit) in series usually act as high-pass filters instead of low-pass filters like the my results indicate.

Final Project:
In expanding upon my proximity guitar effect controller, I found that I could possibly make the device universal. It seems as though, what I am really designing is an extension for the potentiometers on normal instrument effects. If I could not create the necessary effects on my own, I can develop a connector that would go into a normal effects pedal so you could either plug in your on-board guitar controller via this connector (some type of multi-pin connector) or simply disconnect the device and use built-in knobs and switches on the effect. This development would allow users to use the device with any pedal but not limit themselves to one or two possible effects, but be able to plug into their entire pedalboard and at the same time maintain their pedals as traditional stompboxes. Another development I have made is attaching the device not to the guitar itself, but to the pickguard. On most guitars, the electronics are all bolted to the plastic pickguard not the actual wood of the body. By attaching my controller to the pickguard, the user can utilize my controller without having to do any major modifications to their instrument. You can buy replacement pickguards for $10 at retailers. The challenge with that design is that not all guitars have pickguards, then some modifications would need to be made to the guitar, but the concept would stay the same. The electronics would be mounted to a plastic sheet which will then be attached to the guitar.