There are many timer circuits available in the internet using IC555 or IC 4060 also using microcontrollers like arduino, or even using only mosfet. I also already made a simple timer using IC555. These are more of hobby based circuit and arduino type circuits are bulky. I need a timer circuit that is programable and accurate with real time which can be uses as commercial.
Recently I came across a programmable multi function timer 35238-MP as attached. I like it because it is compact and programable. I haven't bought one yet, however from the images and videos in youtubes, I could not see using of any microcontroller/microprocessors like components in the board.
I am wondering how does it works as a programmable timer without using any controller?
I want know if anyone has any idea on how it works (just a brief). Or similar timer circuit of such kinds that is compact, accurate and programmable. What components should I used to make such circuits for commercial products?