I’m pretty new to this. I’m trying to reverse engineer a MEC turtle mini flashlight PCB. I want to try to rebuild it on a breadboard as a side project. From looking at the PCB it looks like it consist of two resistors, a diode and a black round thing. I’m not sure if it is a transistor or some sort of LED driver. Any feed back is appreciated.
Sorry I can’t figure out how to actually upload a picture of the PCB, so here is a link where you can kind of see it. As you can probably tell my background is in mechanical engineering and not electrical.
The black blob looks like an epoxy-coated chip-on-board. To save cost, they take the bare silicon die and glue it to the board, and connect it with bond wires to traces. Then they add a blob to protect it. Unfortunately, the only thing you will be able to do is to remove the board from the plastic housing and use it as-is.
Or try to record it’s entire behaviour repertoire based on using the switch function and see if it can be replicated with a logic IC circuit or microcontroller program. But that is perhaps beyond your current skill level. What does it do when you press the switch? And does it function differently once you press it again or release it.
