Cited as a reference · for some experience
Arduino as ISP
Why people recommend it
A tutorial cited around running a second Atmel chip with Arduino, and it left some viewers with questions about pins and shared grounds.
Watch for: Some viewers were confused by the wiring
In their words
This video is about using external power supply on a 2nd Atmel.
user7058377 on electronics.stackexchange.com, Sept 2021. CC BY-SA.
