This is my poor-man's RGBi to VGA converter that can be built with just a Teensy 4.0 and a bunch of resistors. Works quite well with low resolution modes and works also but with a little less quality ...

Converts RGBI/HSYNC/VSYNC TTL signal at 15 MHz pixel clock and 640 by 200 resolution to standard VGA. Prototyped on Arty A7-35T. Production on Cmod A7-15T board.

Old-school Macintosh-to-VGA adapter. Just solve for X, set the right DIP switches and you’re golden. If you’re the happy owner of a vintage Apple system like a 1989 Macintosh IIci you may know ...

Mini HDMI to VGA Cable on sale, Microware Micro HDMI Male to VGA Female Video Cable Converter Adapter black on sale, Cable Matters 113048 BLACK Micro HDMI to VGA VGA Adapter on sale, StarTech Mini ...