This is a motor controller for evaporative air cooler. I'm new to electronics so I'm trying to understand this chip upside down. But I have a problem with these components.
1. Q2 , I think it's transistor but I'm not sure.
2. EC3 (ss 100 16v) i think it's an oscillator but who knows.
3. EC4 battery?
4. REC1 no idea what it could be.
5. The IC f8234. I looked for the datasheet online but couldn't find anything.
and I would like to know if it's possible to draw the schematic from the pcb for more understanding of the controller.
Best Answer
Q2 is a SMT transistor in what's known as a SOT-23 package -- there will be a short (3 character or so) code marked on it that can be looked up in a SMT guidebook online to find the full part number. ECx are electrolytic capacitors (why EC and not C? designer preference I suppose). REC1 is a remote control IR receiver -- these are basically commodity parts these days. The IC is indeed probably a microcontroller, perhaps mask programmed and house or otherwise custom marked instead of carrying full manufacturer markings.