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  1. R

    Ampere/voltagemeter

    Hello, I have a problem that I need your help with. I bought an amp voltmeter. I want to connect it to show a small dc-motor with volts and amp. But the problem is that the meter will not work if I change the polarity. The direction of rotation of the motor is changed by reversing the polarity...
  2. R

    Potentiometer

    Hi, I need help. Can I find any potentiometers where the rotation angle is smaller than usual? Usually it's I guess 290 degrees but can somewhere find about 90 degrees? I need a 100k potentiometer that adjusts the 90 degree rotation, I don't know if they are anywhere.
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