this post was submitted on 25 Jun 2024
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Daily Discussion Thread - Wed Jun 26 2024 (aussie.zone)
submitted 4 months ago by brisbot@aussie.zone to c/brisbane@aussie.zone
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[–] trk@aussie.zone 4 points 4 months ago (1 children)

Anyone know much about electronics?

I have an NTC probe that reads 9K @ 0C and I want to add a mechanical offset as the controller does not have this functionality.

If I throw a 32K resistance in parallel I should get my +5C offset at 0C which is perfect.

BUT... I'm feeling a little greedy and I'd like to trim it a little each way, and I reckon between 25K and 50K would be a perfect amount. If I throw a 50K potentiometer in there, it's variable between 0 and 50,000 which is not ideal. Is there such a thing as a potentiometer or similar that provides between 25K and 50K resistance?

[–] trk@aussie.zone 4 points 4 months ago (1 children)

Never mind, I'm a dickhead... I can just stack a fixed resistor and a potentiometer in series

[–] Baku@aussie.zone 3 points 4 months ago

LOL This dude didn't even know you have to stack the fixed resistors and pontomoters in series... What am idiot - 🤓

(/s in case it wasn't obvious. I genuinely have no clue what this means, but I couldn't miss the chance to make a good joke)