I was watching this video on JTAG. It is mostly too difficult for me to follow, and I will likely learn more about UART first before returning to this.
At around 13:00 he uses a multi-meter to discover VCC, GND, and which pin does what. I was wondering if someone could explain to me what exactly he is doing?
My intention is to repair an old television with a broken panel (on/off, channel up, channel down, volume up, volume down) where I want to discover which pin does what. I think it will be a fun project to wire up some buttons to an Arduino, and send the correct signal to the correct pin.