this post was submitted on 25 Jun 2024
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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)

[–] coaxil@lemm.ee 3 points 4 months ago (1 children)

Hump day, and the nice cooler nights have eased :( didn't even get to bust out the thicc blankie yet!

[–] PetulantBandicoot@aussie.zone 4 points 4 months ago (2 children)

I was starting to think I might need to invest in an electric blanket! Body heat seems to do an alright job at heating the bed up, however the initial plunge into bed is quite cool.

[–] Mittens_meow@aussie.zone 5 points 4 months ago

Do it. A pre warmed bed is bliss. I sleep hot but takes a while to get toasty without the blanket.

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

I love the initial dive in to a cold bed. Then you create your warm little cacoon and get all snug and its so nice to sleep in. And then the alarm goes off and its work again :(

[–] PetulantBandicoot@aussie.zone 1 points 4 months ago

Yeah, that's the best part of winter (the warm cocoon part 😁, not the alarm and work part 😢)