At Adafruit, they build up from an Arduino with a proto shield. An unpopulated board is loaded with pogo test pins and then connected to the proto shield. The board rests on and is aligned with ...
A short list of supplies is required, including an Arduino, a proto shield kit, a ZIF socket, and a blank ATmega chip. The process is probably pretty straightforward and likely familiar to many of ...
Arduino recommends either a Segger J-Link ... You have to use a MKR Proto Shield (applicable only for MKR boards) or solder ...