Do the pins GND A VCC TX RX B on the USB AVR programmer 2.1v suffices in writing the bootloader
on to the A-star ??
On the side of the A-star controller, would I need to connect VCC or GND seperately or the 2.1v can take care of all that during the process of writing the bootloader ??
I have made 3 custom boards and unfortunately, I haven’t exposed the ISP pins, am I doomed ??