I am redesigning our bathroom and currently looking at two different light sources

  • 12V LED spots with a dimmable LED driver (via 1kHz PWM)
  • Some sort of chandelier with a E27 (bulb).

I want the bulb also to be dimmable. I found this bulb, which needs a classic triac dimmer. Since I want to control the lights using a self build controller (based on the SAM51J) I do not know the correct approach.

I was looking for dimmable 12V bulbs but was not able to find anything commercial. Either they are dimmable with a LED-driver or via "Smart"-Bulbs (zigbee or similar).

Is there a bulb with E27 which I can dim over a 12V LED-Driver?


1 Answer 1


In the meantime I found a solution, which also changed the design:

  • There are some 24V-Led Bulbs (even for E14) available in most LED electronics shops online (even on A****n)
  • As LED-driver I will use the DALI protocol with its special drivers. In my case with constant voltage
  • As control unit there are DALI masters available in said shops. Schematics for DALI masters are also available online (for Arduino, standalone)

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge you have read our privacy policy.

Not the answer you're looking for? Browse other questions tagged or ask your own question.