What's with mint boxes and electronics? Beats me, but they are somehow made for each other. I had built ladyada's USBtinyISP v1.0
circuit on a breadboard which I used every other day. It worked sporadically(and never at hour of need), used up half of my breadboard and looked ugly. So I decided to try my hand at home PCB fabrication and build it in, of course, a tiny tic-tac box. Since I was a beginner, the circuit is easy and single-sided and uses crystal instead of ceramic oscillator.
Frankly, I didn't even expect it to work so didn't take any photographs. I recently decided to make it again with a few improvements(notice the old orange one has the top backwards) and document it for Instructables. You have to make one of these if you:
- want to use bare-bones super-cheap arduinos in your projects
- want to burn bootloader to a blank AVR for your Arduino
- love working with AVRs
- are thinking of buying a programmer
Note: You need to break out of the chicken-n-egg problem and get the program onto the ATtiny2313 used in this project. Check out Step 4 for detailed information and possible solutions.Edit: Modified board so resonator can also be used for timing! If using crystal, middle pin for resonator can be ignored. If using resonator, no need to solder capacitors C1 and C2.