Hey guys, i'm building my bed for myself as a holiday project. (yes school holidays are here). So to add that touch of electricity i've decided to add a touch switch which activates an array of leds. (for bed time reading)
Ive found this schematic:
https://www.electro-tech-online.com/custompdfs/2006/04/120v1out-1.pdf
Can someone tell me what the "YEL" thing is?? (the device which comes right after the "touch button". I have no idea what it is, or its purpose. :?