Best posts made by madhunm

@AndreS Care to release the firmware and board files under FOSHW?

Hello,

First off, let me apologize for the crap PCB design; I am nowhere close to @T3P3Tony or others on this forum when it comes to PCB design / routing.

Some background: I have my printers on a UPS; however, if and when there is a power cut, depending on how many printers are running, the UPS may get overloaded. Before the UPS circuit breaker trips, I switch off the bed heating to make the power draw a little less.

I wanted to 'automate' the process and here is what I have come up with: a mish-mash between the Prusa Power Panic and a Duet capacitor bank.

The goal for this is to enable the bed to be switched off automatically; while allowing printing to continue / duet power recovery to kick in.

Please note, the Panic_In signal comes in from a non-UPS outlet.

Please review the attached schematic and board files and let me know if you see an opportunity to make this better.

Duet_Power_Panic.pdf

https://drive.google.com/file/d/1wGrmC7JF2DsiOV9DeAoTHiJEPFfpRMTZ/view?usp=sharing