smokebelch
New Member
Firstly, hello all, this is my first post, so go gentle !!!
I will point out at this stage, what i know about electronics is what i've self learnt this week !!, so please dont flame me if my terminology is wrong, and very basic
Right, i've made some heaters for my telescope, using 330k 1/2w resistors in parallel running from 12v, I've connected a SPST switch into the mix, and it all works fine, BUT it gets too hot too quick. I was told that I would have to put a potentiometer in to control the voltage going to the resistors, and therefore controlling the heat. I inserted a 1k potentiometer, (all wired correctly), and now my heater doesn't work at all !!!.....i've checked it all out with a meter, and everything is fine, am i correct in assuming that the pot creates too much resistance for enough current to heat the resistors?
Can anyone tell me what i need to put into the circuit to be able to control the voltage, and the heat generated?
Apologies for the length of the post.
many thanks in advance
I will point out at this stage, what i know about electronics is what i've self learnt this week !!, so please dont flame me if my terminology is wrong, and very basic
Right, i've made some heaters for my telescope, using 330k 1/2w resistors in parallel running from 12v, I've connected a SPST switch into the mix, and it all works fine, BUT it gets too hot too quick. I was told that I would have to put a potentiometer in to control the voltage going to the resistors, and therefore controlling the heat. I inserted a 1k potentiometer, (all wired correctly), and now my heater doesn't work at all !!!.....i've checked it all out with a meter, and everything is fine, am i correct in assuming that the pot creates too much resistance for enough current to heat the resistors?
Can anyone tell me what i need to put into the circuit to be able to control the voltage, and the heat generated?
Apologies for the length of the post.
many thanks in advance