I'm replacing a 10turn/100k trimmer with a 10-turn/100k wirewound pot on a smps module, for an adj. bench power supply project.
What I am finding is that my inventory of 100k wirewound potentiometers are all flakey. Normally, I'd just patch one end of the pot to the wiper, & settle things out that way, but with the smps that I'm using, a high ohmic value corresponds to max voltage output on the smps...
When the wiper on the pot slides along the windings, it bounces, loosing continuity, causing voltage spikes.
I was thinking of bypassing one of the legs of the pot (wiper?) to ground with a cap, but none of the three legs of my pot have any
continuity to the ground plane, so I don't know what to do.
What I am finding is that my inventory of 100k wirewound potentiometers are all flakey. Normally, I'd just patch one end of the pot to the wiper, & settle things out that way, but with the smps that I'm using, a high ohmic value corresponds to max voltage output on the smps...
When the wiper on the pot slides along the windings, it bounces, loosing continuity, causing voltage spikes.
I was thinking of bypassing one of the legs of the pot (wiper?) to ground with a cap, but none of the three legs of my pot have any
continuity to the ground plane, so I don't know what to do.