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Electronics >> Schematics Depot >> Audio >> magnetic cartridge amp
 click here to enlarge schematic parts:
all resistors are 5 or 10 percent tolerance, 1/4-watt all capacitors are 10 percent tolerance, rated 35 volts or higher a magnetic pickup from an old record player can make a great pressure, and vibration sensor. replace the needle with a plate of thin metal (copper off a pcb is good,) and you've got an incredible touch sensor. use this circuit to amplify the circuit before passing it into sound level detector.Return to: Schematics Depot, or Audio Circuits |
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