Good evening everydoby. I want to make a light dimmer, but I've got some problems with it. I need to dim two light bulbs 12V/60W each. I was trying to do it with an LM358 but the power loss on the last transistor would be like 120W (12V per bulb/ current 10A). Can someone help me to create a scheme? I would like to make it and try it out. I want to mention that I am a beginner. I've attached my first project, but as I said there would be a big power loss on the last transistor. I have read about PWM but how will it work with two light bulbs that need 120W?

 

use a pwm controller .

http://www.pcbheaven.com/circuitpages/PWM_Fan_controller_using_a_555/

 

So as its written there I should only choose another MOSFET according to my needs (one that can carry 10A) and instead of the motor put two parallel located light bulbs, am I right? I forgot to add, that English is not my native language, so sorry for all mistakes that I have made.

 

Yes replace the motor with the parallel bulbs, you may need an heatsink for the mosfet.

 

If using AC why not use a Triac control much lower component count than DC & PWM.

Max.