A few years back I made a motion sensitive night light as a Mother’s day gift and while it worked pretty well it really chewed out the batteries. And as with all devices that eat batteries it eventually fell out of use. The standby current was around 4 mA due to the common LM324 opamp that was used to amplify the PIR motion sensor signal. The original enclosure was CNC milled from a bit of re-purposed apple which had a former life as a guitar body I built as a child. Apple happens to be my favorite wood, it’s rich and creamy and the project just needed some new electronic guts.
Make a robot friend with Adafruit’s CRICKIT – A Creative Robotics & Interactive Construction Kit. It’s an add-on to our popular Circuit Playground Express, FEATHER and other platforms to make and program robots with CircuitPython, MakeCode, and Arduino. Start controlling motors, servos, solenoids. You also get signal pins, capacitive touch sensors, a NeoPixel driver and amplified speaker output. It complements & extends your boards so you can still use all the goodies on the microcontroller, now you have a robotics playground as well.