Linux can have a somewhat split personality. If you use it as a desktop OS, it has a lot of GUI tools, although sometimes you still need to access the command line. If you use it as a headless serv…

My WiFi access point is remote from the cable modem and router. They have a traditional AC UPS (with large batteries that can power them for several hours). I wanted to also provide back-up power for the AP but an AC UPS was too large and felt inefficient. I found an old app-note from Maxim that made clever use of a reset supervisor IC to detect power failing and fashioned my own circuit with parts on-hand. The circuit is fairly efficient and only switches on the local DC-DC converter when power has failed. Otherwise it supplies power from the AP's original AC-DC power supply.

There’s many different ways of measuring current. If it’s DC, the easiest way is to use a shunt resistor and measure the voltage across it, and for AC you could use a current transforme…

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xmpp-cloud-auth - :key: External authentication script for Prosody/ejabberd/… against Nextcloud+JSXC