Gemma Owl Screech Project
Overall this was a quick an easy project, though I didn’t have a LiPo battery when I finished, and had to run it off USB power. Later I got some batteries to use for this platform, and began to study the various types of LiPo batteries and chargers needed for smaller projects like this. After all, who wants to keep buying 9 volts?
2015 Update – It appears there is now a Gemma 2 board which includes an off switch!