This project implements an Atmel In System Programmer (ISP) programmer using only a low cost (≈$5-$17) Pro Micro (Sparkfun DEV-12640 or equivalent clone) (or Leonardo) module with an ATMega32U4 ...

This sketch can be used to let one Arduino program a sketch or bootloader into another one, using the ISP programming pins. This sketch is based on OptiLoader, but modified for use with Adafruit's ...

For instance, Arduino boards can act as a programmer tool for other AVR microcontrollers using an Arduino ISP and is one of the easiest and cheapest methods for programming AVR MCUs. The Arduino ...

[Minifloat] is using his TI Launchpad development board as an In-System Programmer for AVR chips (translated). There are a ton of homebrew AVR programmers out there, and using an Arduino for ISP is ...