Hi All,

I recently bought and installed a Manrose timer board for one of their inline fans (so it runs on after the lights are turned off). I installed it this weekend (actually driving a similar fan from another manufacturer).

It's working fine, but I found it a little curious...€¦.

It's a tiny PCB with quite small tracks. It only has about 10-12 components, from memory, a small transistor at the input end together with a pot to adjust the delay, a big resistor, a handful of tiny things most of which are probably resistors, but one or two could be diodes or something else a chip, and another little transistor at the output end. The permenant live is just a track that goes straight to the output, and the neutral goes most of the way there and then gets switched to the output.

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.
Are there now 240V AC chips? Have there always been and I've just not come across them before?

I got it for about £10 by the way (on special offer, reduced by 50-ish %), so a nice cheap simple way to add a timer to something that doesn't require much wattage.