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Old 25th April 2007, 07:59 AM   #1
impsick is offline impsick  United States
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Default schematic question

when you see this type of pot on a schematic how do you determine what goes where? like V+goes to what pin, signal goes to what pin?

this is the treshold control on a compressor. also by the cw(which im guessing is clockwise??) was a little circle with a line accross the middle of it.

sorry for the newb question but thanks.
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Old 25th April 2007, 08:24 AM   #2
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Almost invariably a pot will have three connections. The centre one will go to the "wiper" of the resistive track or output connection.

The outer connections go to the ends of the resistive track. Which one goes to + and which to - is arbitrary, but it effects whether the pot is turned cw or ccw (counterclockwise).

The circle/bar is a symbol for screwdriver adjustment.

If there is a convention, cw should be used to make something "bigger" (higher gain, more positive etc) but often it is juat a question of pcb layout convenience!

It is very easy to check all of this with an ohm-meter and pot out of circuit.
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Old 25th April 2007, 09:01 AM   #3
impsick is offline impsick  United States
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ok, yeah makes sense. i havent done anything besides the simple volume pot on an input of an amp. thanks.
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