Running an SE/30 solely on a Pico PSU? (no OEM PSU / analog board)

[MacintoshLibrarian]

Howdy!
Pardon my ignorance, but I am trying to figure out if it is possible to power an SE/30 logic board completely separate from any analog board.
I know that there are projects out there to integrate a Pico PSU into the SE analog board, but what about direct connection to the logic board itself?

This is all to reach my goal of having an SE/30 board running with an LCD in side an original case

Thanks!

 

[woodapples]

Hi! I was doing a project over yonder https://68kmla.org/bb/index.php?threads/mac-classic-with-a-pi-usb-c.42164/ that reuses the analog board and CRT as a display for a rpi4 and i was able to do some fenagling on the SE/30 and Classic logic and analog boards while i was prototyping.

I think i was able to power the logic boards completely with just some linear regs without the suboptimal power supplies they had. Might need to take a look again at the schematics and see what voltage rails you can use.

 

[woodapples]

Okay, seems like it has been addressed here:

https://tinkerdifferent.com/threads/se-30-without-an-analog-board.2683/

reposting the pinout image for brevity

 

[MacintoshLibrarian]

Hi! I was doing a project over yonder https://68kmla.org/bb/index.php?threads/mac-classic-with-a-pi-usb-c.42164/ that reuses the analog board and CRT as a display for a rpi4 and i was able to do some fenagling on the SE/30 and Classic logic and analog boards while i was prototyping.

I think i was able to power the logic boards completely with just some linear regs without the suboptimal power supplies they had. Might need to take a look again at the schematics and see what voltage rails you can use.

OMG! I love this project idea :O I have wanted to use a real CRT with a raspberry pi... for reasons >_> and you went and did it! that is amazine.

Thanks for the tip!

 

[woodapples]

I might as well post the schematic here coz i can't web.archive the one at our good friends o'er 68kmla