Step 2Building
Connect the parts according to the schematic.
-I connected the grounds together and both left and right of the stereo plug together, since its going to be mono anyway.
-For the phone line cord, you use the center 2 wires only
-I didnt use a variable resistor, I used a 470OHM and it was loud enough
-Im currently powering it with my power supply, but will likely wire it into the phone's power supply. you could also run the wires to a usb plug and power it from your computer.
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