Bit banging VGA from an SD card slot

bit-banging-vga

If you've got some favorite electronic device that includes an SD card slot but doesn't have a video out port you may be able to push VGA signals through the card reader conductors. That's exactly what's going on above with the Ben NanoNote, a sub-$100 Linux device which we've seen using its SD card slot as general I/O before. The hardware to capture the signals includes a breakout board for … [Read more...]