Adjusting the power to a heating element.

Thread Starter

paradox226

Joined Mar 14, 2017
2
I am working on a project where I am trying to adjust power going to a heating element. I am running between 12-18 watts of power. I have been looking at pots, however the ones that can handle the power are large and rather expensive. What other options are there. I am trying to keep it simple (Analog), however I can work with a digital solution. Just keep in mind I am new to electronics and learning as I go, so if you need more information just ask.

Thanks
 
Last edited:

Thread Starter

paradox226

Joined Mar 14, 2017
2
Hello,

At what voltage does the heater run?
What is the maximum power the heater can handle?

If the heater is running on a DC voltage you could have a look at this simple PWM circuit:
https://forum.allaboutcircuits.com/threads/project-simple-pwm-circuit.9016/

Bertus
Thanks You for the link.
Yes it is running on DC Voltage. The heater will be running at 12v ~1.0-1.5A, I don't have the maximum rated power (long story). I have tested it at 14.8v@ 1.2A =17.76W and it de-soldered the leads. I will be using high temp solder and retesting it, I just wanted to be able to adjust it slowly so I don;t burn it out.
 

bertus

Joined Apr 5, 2008
22,264
Hello,

The given circuit will run from 10 to 15 Volts when you use a standard mosfet.
With a so called logic gate mosfet, you can go down to 5 Volts.

Bertus
 
Top