[atoav]

So electrical engineers could just use a MCU let it power itself of during flight, use passive components (discharging capacitors) to trigger a wakeup after a set time and you are good to go?

[someweirdperson]

> use passive components (discharging capacitors)

mechanical egg timer?

[llampx]

Definitely no problem with a ticking noise coming from your luggage.

[atoav]

Candle clock