Noot / Erwt Notes

Note #6 Saturday 24 September 2011

Transistors and veroboard for prototype arrived and I hacked out a quick test board:

Some old battery holders, some header and a lot of hot glue later:

It runs around quite happily with NiMH AAs which is good to know (~2.4V). Must be careful about the eventual battery holders though, as the motors could get in the way of the pins (might need to make them non-symmetric, sigh). Added the transistor H-Bridges which work OK, but probably need the resistor values tweaked. I thought I could hook up the AVR by just soldering thin wire to the pins but that appears to be too much fiddly-work. I’m go to see if can chop the AVR footprint off an old Cogbot board tomorrow and use that as a base.