Solved: Chicken-Egg-Problem with AVR DIY-Programmer

There are several projects to build an AVR-Programmer. But they all have the same problem. How to program an AVR-Microcontroller without a Programmer. What can You do? For example use your Sound Card to solve this issue.

AVR programmer made without a programmer

We want to build the USBtiny Programmer from http://dicks.home.xs4all.nl/avr/usbtiny/index.html

Wiring

The parts required are readily available and the circuit is easy to build.

Simple Sound Programmer

Uploading the firmware

Connect your circuit to the headphone jack, turn volume up to 100%, activate the reset and press the play button.