i want to control(increase or decrease ) the brightness of 220v lamp using ardui

I am trying it with triac ac light dimmer module but the lamp is only glowing with full intensity no other levels are seen. can you please suggest whyty is this happening.

what lamp? one with AC/DC switching power supply?

Schematics please.

rahul77659:
I am trying it with triac ac light dimmer module but the lamp is only glowing with full intensity no other levels are seen. can you please suggest whyty is this happening.

I expect there is a problem with the way you have things connected up, the way you're trying to drive the dimmer or with your code in general. I can't see any of those things so it is just a guess.

Steve

Also, please give us links to the information/specs for the mysterious "dimmer module".

We'll also probably need to see your code.

And, I assume you are using a regular incandescent light bulb?

Just like you, we are in the dark.

We need more information from you to be able to help you solve the problem.