I've needed a variable resistor several times recently and used two legs of a pot to get the job done, leaving the other end disconnected. So far these circuits have all worked as expected.
More recently, however, it seems like when I see pots used as variable resistors in other people's schematics, the unused side is always connected to the wiper. Is there a reason for this extra connection?
As far as I can tell, it would have no effect electrically, unless maybe in the case of a badly worn wiper the extra connection guarantees some sort of continuity even when the wiper isn't working well... dunno, grasping at straws here. What's the purpose of the extra connection?
Below is an example of a circuit I made without the extra connection between the wiper and the left side of the pot(VR1.)
More recently, however, it seems like when I see pots used as variable resistors in other people's schematics, the unused side is always connected to the wiper. Is there a reason for this extra connection?
As far as I can tell, it would have no effect electrically, unless maybe in the case of a badly worn wiper the extra connection guarantees some sort of continuity even when the wiper isn't working well... dunno, grasping at straws here. What's the purpose of the extra connection?
Below is an example of a circuit I made without the extra connection between the wiper and the left side of the pot(VR1.)