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About Kevin Darrah
...just a fellow hobbyist giving my two cents
kevin(at)kevindarrah.com
Recent Videos from Kevin Darrah
Mass Write SD Cards from ESP32 - Might be a useful trick someday
I had to flash 100 micro SD cards, so used an ESP32 to help automate this by uploading the files to SPIFFS first, then with a little code, write those files to the SD cards. And why not make a video about it, in case you also ever need to do something like this?
SD Card Connections (Schematic):… Simple Power Outage Monitor w/Push Notifications - Cellular 4G LTE
Need an easy way to get a push notification if your property looses power? Here's an easy way using a cellular based 4GLTE module from Particle:
Everything you need:
Project page here:
https://trigboard-docs.readthedocs.io/en/latest/cellularProject.html#power-outage-monitoring
Boron here: h… Geiger Counter (BR-6) - Battery/Charging UPGRADE - Full Tutorial
Was going to say this is just a quick video... but nope, my classic rambling style upgrading this cheap Geiger counter (BR-6). Originally, this thing has terrible charging capabilities basically "cooking" the Ni-MH batteries. Why not just upgrade this to use a common Lithium cell? That's what th…
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