I bought 10 Arduino Nanos for a project, each with all of their headers soldered in place. Each was going to go into a tiny space, so I found myself needing do desolder the ICSP headers.
This led to a bit of a moral conundrum. What would I lose by removing these useful looking headers. They cover quite a lot of space on the nano, so they must be important right? Am I going to regret removing these things when I finally realize how useful they are (I thought to myself.)
In the end, I did remove the ICSP headers, but the event got my thoughts going. What is this header all about? Why is it there? What can I do with it? I began to search for things that I could do with the ICSP header, but engaging results were not forthcoming ( except for this project: https://www.arduino.cc/en/Hacking/ParallelProgrammer )
Anyway, I was more interesting in things that flash, move, jump, sing, and such, so are there any interesting things that can be done with the ICSP header?