Introduction: 555 Square-Wave Theremin
For this project, you will need:
10k ohm resistor
10 megohm resistor
A 3.9k or 4.7k ohm resistor
555 Timer ic & socket
2N3904 NPN transistor
.01u ceramic capacitor
photo-transistor (or other type of input, pot's and skin work fine)
wires and connectors
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Step 1: Schematic
Since i didn't take pictures while i was making it, here's the schematic (better than pictures in my opinion).
Step 2: Finished Product
Step 3: For Added Effect
use an arduino board and solid-state relays for a synthesizer effect. or use push buttons and resistors for a more simple synthesizer like i did. or even better, find a way to combine both! i had a picture to add, but the uploader was on the fritz. :(