MAKE: Blog: Lemon-Powered AVR Tiny

Lemon-Powered AVR Tiny

Dhananjay V. Gadre wrote in with this awesome project:

We have been itching to try running an AVR micro on fruit power. I do have the latest Picopower AVR samples, but it was too much of an effort to solder a 64 pin TQFP and so we decided to give a try with Tiny13V chip instead. The chip was setup to operate at an internal clock of 128KHz with a divide by 8 setting. A program to toggle an LED on pin 3 of the micro was set up with a series resistance of 4.7KOhm. The fruit cell was made out of a bare PCB partitioned in 4 sections. The copper of the PCB made up one electrode and for the other we used zinc strips from new batteries :) Two lemons cut in half were used.
The setup works well and the LED light didnt seem to diminish at all.

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