Keyboard Builders' Digest / Projects
loongcat40
Chris Lo released his loongcat40, a gasket-mounted offset ortho keyboard featuring a nice OLED.
Published November 24, 2025
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Christian Lo, designer of many compact ortholinear keyboards, is back with a new project: the loongcat40 – a gasket-mounted offset ortho with a large OLED screen and supporting various bottom row configurations with split 2U spacebars and blockers.
I wanted to show my gasket mounted keyboard with a large central OLED, the loongcat40. It's a remix of a lot of prior projects, like the banime40 and keezyboost40. It also features custom OLED art from @suh_ga! – Chris.
Actually, according to this blog post by Chris, the loongcat40 is the improved version of the banime40. With Pi Pico instead of a Pro Micro, adding a huge OLED and different bottom row options supporting 2U spacebars and blockers.
Specs
- 31-40 keys, 4x10 offset ortho with various bottom row configurations
- MX switches, hotswap
- Raspberry Pi Pico controller
- 2.08" OLED screen (SH1122)
- QMK firmware
- 3D-printed case
Resources
- Blog post by Chris
- loongcat40 on Github
Published on Mon 24th Nov 2025. Featured in KBD #202 (source).
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