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Craig Bishop

I’m pretty happy with the refresh rate from the new FPGA board! 36 SPI buses each at 70 MHz driving 144 128x128 pixel LCDs, each inside a 3D printed keycap mounted on a mechanical keyboard switch. It’s nice and clacky!

Craig Bishop

New FPGA driver board and in-progress shots. The 9 flat flex connectors with 4 SPI buses each work like a charm. No SI issues yet, but I definitely don’t want to measure EMI on this beast. There’s room to spread the clocks over different phases if needed though.

FOGA board with 9 flat flex connectors, 40 pins each, to drive all the LCDs
18x8 grid of 128x128 pixel LCDs mounted on 3D printed key caps on mechanical key switches
One of the LCDs had a soldering issue on the 12-pin flat flex connector on the bottom
Jul 22, 2024, 05:28 PM·Public·Mastodon for iOS
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