Turning an Arduino of virtually any sort into a simple AVR 6-pin ISP programmer is old hat. But when Atmel came out with a series of really tiny AVR chips, the ATtiny10 and friends with only six ...
Did you order that 4-port USB hub because it was almost free but now it’s just sitting in your junk box? Why not turn it into an In System Programmer for AVR chips? [Paul] came up with HUB ISP ...
The internal flash and EEPROM memory of many of the AVR microcontrollers can be programmed "in system", without removing the circuit from its socket, through the ISP (In-System Programming) interface.