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Mac-se-video-converter: Compact Mac to VGA signal converter using rPi Pico
- eschaton 4y agoKind of excessive for something that can be done with some passives if you don’t need to also scan-convert…
- userbinator 4y agoIndeed, I believe 512x342@60.15 is almost certainly within the range of what every LCD these days can sync to.
- polpo 4y agoCompact Macs have a horizontal scanning frequency of 22.2kHz. Good luck finding an LCD that will sync to that. Fun bit of trivia: Compact Macs also used the video scanning sync timing to feed the audio DAC, producing 8-bit audio at 22.2kHz. Pretty good for 1984!
- userbinator 4y agoCompact Macs have a horizontal scanning frequency of 22.2kHz. Good luck finding an LCD that will sync to that Many will go down to 15kHz (CGA), and some EGA modes also use 22kHz: http://15khz.wikidot.com/ http://15khz.wikidot.com/
- polpo 4y agoIt's the opposite of excessive. If you need scan conversion, which you almost certainly do, this is far cheaper than just about anything else you can use to get a usable video signal out of a compact Macintosh.
- simondotau 4y agoThis is cool, but what I really want is the opposite. I want a way to replace the motherboard in a classic Mac with a Raspberry Pi supplying an analog video signal to drive the monochrome tube.
- theodric 4y agoHere you go: https://www.instructables.com/Turn-a-Broken-Mac-Classic-Into-a-Modern-day-Raspbe/ https://www.instructables.com/Turn-a-Broken-Mac-Classic-Into... I'd love to have a generic HDMI-> CRT interface, but that's a bigger ask.
- simondotau 4y ago<squeal and giggle>
- tyingq 4y agoAnother project driving the old Mac CRT: https://trmm.net/Mac-SE_video/ https://trmm.net/Mac-SE_video/