doodad /doo͞′dăd″/
noun
1. Something, especially a small device or part, whose name is unknown
Schematic drafted
Guitar Battery Checker
An always-wired, zero-standby-drain 9V battery health tester for an acoustic-electric guitar's onboard preamp.
Wired & sourcedZero Night Light
An ATtiny85-based analog LED night light with a gamma-corrected knob for fine control at the dim end.
Design stageCoop Monitor
A solar-powered, ATtiny85-based low-feed/low-water alert for a chicken coop, with float-switch sensing.
Firmware draftedRobo-Mower
A small rover platform with a zero-turn drivetrain, WiFi RC control, and a coverage-aware autonomous mode.