In article ,
Chris Holmes wrote:
Thing is, in my limited experience, transistors and chips required a
power supply of some sort to convert mains to 5V and or 12V DC. But I
couldn't see anything on the board that I recognised as being capable of
doing this.

Think dimmers. Which have been around for a long long time. Without a low
volts transformer. And some later ones have quite sophisticated
electronics as well as a triac or whatever.

--
*Laugh alone and the world thinks you're an idiot.

Dave Plowman London SW
To e-mail, change noise into sound.