Inexpensive, low power, tiny, but surprisingly powerful devices are intriguing. I'm not sure why that is, but it is.  Can a microcontroller be my computer someday soon? Probably.  Anyway.. I was querying Gemini earlier and was thinking about a tiny multi-meter project using a INA219, an RP2040...

Sensors + Microcontrollers as Human Interface Devices Start with a IR receiver for < $1. Add a $2.50 RP2040 zero to any sensor, and a few lines of code with some AI help, or not, and you have a HID (human interface device) that plugs into your USB port. It's natively recognized as a mouse, a...

I thought it would be a great idea to build a lion battery pack with 16.8v that would last during an outage.  It was fun, and I learned a lot. Of course I started with a few more 18650 cells than I should have. I thought, at first "well, they are batteries, right, more is better".  And, I...