So what do three students working "more than full time" on an electric formula student racing vehicle need?
If you guessed "some awesome time consuming side project" you were right.

This is how project couch was born.

So my old notebook - an HP Elitebook 840 G5 - did not start charging when I got it out to test something.

Opening it up the battery was discharged to 0% so the BMS turned off the output and the system did not have any voltage on the main supply bus.
This notebook should be able to recover from such a situation on its own but for some reason it didn't.

The Annoy-o-Tron is a small little device wich I developed together with a friend to teach him the basics of electronics and microcontrollers. Why a device to annoy people? Because trolling is fun! (evil grin)