We have successfully fried 4 speed controllers and the RC last year (it was our rookie year
) by trying to weld something on the bot while all the above mentioned electronics still remained connected. The ground wire from the welder fell off and touched a terminal on a speed controller... The explosions were quite spectacular
Thankfully, another team lent us their old 883 speed controllers and RC so we could practice until we got new ones for ourselves. I dont remember the team name now
If it wasnt for that team, we would not be able to compete.