2022-01-01, 08:59 PM
(This post was last modified: 2022-01-01, 10:28 PM by aardvarkash10.)
(2022-01-01, 04:20 PM)abarrow Wrote: The only thing I can think of is an external circuit that has something like a 20 second timer that starts when the RPI gets the shutdown command. This would give it time to shut down before the timer expires and disconnects the power completely.
Thanks for the reply.
The time to power down thing is not a big issue - I can resolve that with a simple capacitor/resistor network that stores, say, 20s of power at the output of the UPS. eg 12v>UPS>Power Switch>Storage Network>12v:5vstep-down>RPi
Its the software that is my downfall!