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SE or SE/30 replacement PSU / no analog board

aeberbach

Well-known member
Before the loss of data there was a post about this. I had started making a replacement power supply for my SE/30, because I’m planning on using a FPGA to drive a LCD - no more need for the CRT, or flyback, etc.

The h-sync, v-sync and pixel data come out to the fpga as does signal from a rotary encoder in place of the brightness potentiometer. The power supply module is a Mean Well PT65B. Like the analog board before it a simple 7905 regulator makes -5v but you probably weren’t using serial comms anyway. A 3D-printed housing makes everything neat and the power inlet and switch look just like the original when the case is closed. The PSU module has the same dimensions as the old PSU so they interchange - new PSU on old analog board, old PSU on new analog-less board.

if you are doing things the messy way - mac to arduino to lcd converter board via hdmi - then this will work already.

I’m working on the fpga driving the LCD now.
 

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techknight

Well-known member
I think it would be neat to do an FPGA project to convert LCD signaling standards from the older parallel stuff like in Powerbooks, and especially the Macintosh Portable, to put out the correct timing signals to more modern LCDs that could be used as retrofits into the old stuff...
 

aeberbach

Well-known member
I think it would be neat to do an FPGA project to convert LCD signaling standards from the older parallel stuff like in Powerbooks, and especially the Macintosh Portable, to put out the correct timing signals to more modern LCDs that could be used as retrofits into the old stuff...
I find this stuff fascinating so there's a chance I will look at that too one day. Do you know if they use a documented standard or is it something that would have to be discovered?

Another project I have in mind is to do some Mac video conversion. While a stretched image from the DB15 is not terrible on a modern monitor it would be nice to be able to display it in correct aspect ratio with sharp pixels anywhere.
 

techknight

Well-known member
I find this stuff fascinating so there's a chance I will look at that too one day. Do you know if they use a documented standard or is it something that would have to be discovered?

Another project I have in mind is to do some Mac video conversion. While a stretched image from the DB15 is not terrible on a modern monitor it would be nice to be able to display it in correct aspect ratio with sharp pixels anywhere.

Portable uses a documented standard. Otherwise, youd have to pull a datasheet of the panel you are replacing and follow those specs. if neither are operable, Logic Analyzer time...
 
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