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1. Foone🏳️‍⚧️ (foone@digipres.club)'s status on Tuesday, 10-Sep-2024 11:58:33 JST Foone🏳️‍⚧️

   I've got two small monochrome CRT modules. They've got an unlabeled connection but from comparing with some other connectors I'm pretty sure it's just:
   Voltage/ground/video/H sync/V sync

   So my question is, what's the easiest way to drive this? Like, some way I can make a raspi or VGA video card drive these?

   • Foone🏳️‍⚧️ (foone@digipres.club)'s status on Tuesday, 10-Sep-2024 12:00:43 JST Foone🏳️‍⚧️

     in reply to

     It's something like this:
     An open frame CRT module for use inside a portable computer.

     https://www.omnivisionusa.com/Industrial-LCD-CRT-Monitors/replacement-crt/crt-monitors/7-inch-chassis-.html

   • philpem (philpem@digipres.club)'s status on Tuesday, 10-Sep-2024 12:04:45 JST philpem

     in reply to

     @foone It depends on the video mode it expects. A VGA card should probably be able to drive it, but if it wants composite video style timing (525 or 625 lines), you'll probably need a sync separator and a composite source.

     edit: I think there's a way to hook a Pi up to generate VGA using an R2R DAC, but it's been ages since I looked. It has a parallel output too, on the GPIOs, it's meant for LCDs. I have no idea how to set the mode timing though.

   • Foone🏳️‍⚧️ (foone@digipres.club)'s status on Tuesday, 10-Sep-2024 12:21:09 JST Foone🏳️‍⚧️

     in reply to

     I don't have any specs for what resolutions/rates it needs, though. So something that can flexibly try a bunch of different options would be handy

   • Foone🏳️‍⚧️ (foone@digipres.club)'s status on Wednesday, 11-Sep-2024 10:36:55 JST Foone🏳️‍⚧️

     in reply to

     okay I found a manual for a protocol analyzer that uses the same model of CRT, which has some technical details:

     So it's 16.66 KHz horizontal refresh, ~60hz vertical, and it uses a 5V signal for the video.