"Newbie needs help" potentiometer as rheostat

Thread Starter

dvd223

Joined Feb 28, 2009
3
trying to use on a 12v spotlight to turn down the intensity of the light but i need some kind of heatsink or resistor. I tryed a 50k .5watt pote. by itself and as soon as you turn it down it fry's

Thanks,David


(added)dc 12volt Sealed beam 7.36-amp spotlight which produces 200,000 CP
 
Last edited:

bertus

Joined Apr 5, 2008
22,270
Hello,

Is the voltage 12 Volt AC or DC ?
How many Watts is the spotlight ?
If it is DC you can use a PWM circuit to dim the spot.
If it is AC you could use phase cutting.

Greetings,
Bertus
 

bertus

Joined Apr 5, 2008
22,270
Hello,

Again is it working on AC or DC voltage ?
This will give info on how to dim the spotlight.

Greetings,
Bertus
 
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