 The UPD-i programmer and the high voltage UPD-i programmer USB serial programmers Which you can use with your AT tiny chips three pin JST SH cable that it comes with that is going into the power on my little AT tiny 1616 I've got ground and then I have the data pin going to the UPD-i pin a bunch of these little LED Noodles little nudes plugged into there as well when I plug in the UPD-i friend there And now if you look in my Arduino session when I hit upload using programmer You're gonna see it is going to very quickly make the connection upload send the code and boom now I have all of these four pins doing PWM stuff unplug the UPD-i friend now I can battery power this UPD-i friend doesn't need to be plugged anymore UPD-i Friend and UPD-i high voltage friend for programming your AT tiny chips