As requested, I've started a thread on this datalogger. It's one of many that I did a while ago but lost interest. Now that flying season has started. I hope to get motivated into doing the actual software. I will try to post pictures of it soon. As you can see, I even made it wireless. The range is limited about 300ft, but enough to do a flyby current reading. I have extra blank boards and can let them go for $5 for those who would like to do the development themselves, just send a self addressed stamped envelope. Note: the max current on this board is 13amps. I will post other designs with higher ratings when I get around to updating the documentation.