Triac dimmer switch for 12v ac halogen help

Thread Starter

David Cool

Joined Apr 5, 2018
Hi all,

I'm working on a dimmer switch to be used with a 120v ac to 12v ac transformer. The transformer is dimmable. I'm attaching pics of the circuit diagram I'm using and my breadboarded circuit. The light comes on but doesn't dim at all, any ideas of what is wrong? Is my circuit wired properly matching the diagram?


Screen Shot 2018-04-04 at 6.21.08 PM.png _circuit1.jpg _circuit2.jpg