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    Testing Digital Display

    I have an old legacy digital display and I'd like to wire it such that all of the digits light up when I press a momentary push button. This is for testing the LED display to verify all are in working condition. The 3 1/2 digits should illuminate "-1.8.8.8" as verification. I think some digital...
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    Series Potentiometers?

    Hello! I'm controlling a current by changing the resistance using a 10 turn, 10k ohm potentiometer. However, it doesn't give me the precision or amount of control I'd like on the bottom end (for example, from 5mA to 2A out of a total of 52A). The slightest amount of pressure on the knob will...
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