First I must thank all the members for the help in the past, just in case I didn't thank you ALL. Q: I would like to use a GPIO pin for a cooling fan, have it run with the PTT and maybe stay on for a minute after PTT drops. I'm sure this has already been asked, so if you could point me to the answering post/script/suggestions, would be greatly appreciated, again. (LOL) Thanks All 73' Jim Frederick KF6QBW IRLP Node #3911 AllStar Node #'s 28839-R, 28842, 28843