Posts on John Huhttps://johnhu.ca/posts/Recent content in Posts on John HuHugoen-usMon, 12 Oct 2026 22:00:00 -0400Making myself design a PCB for the comma.ai Challenge in under 24 Hrshttps://johnhu.ca/posts/24-hr-doing-the-comma-ai-challenge/Mon, 12 Oct 2026 22:00:00 -0400https://johnhu.ca/posts/24-hr-doing-the-comma-ai-challenge/<figure style="text-align: center;"> <img src="https://johnhu.ca/Screenshot 2026-10-12 223092.png" alt="My photo" style="width: 700px; height: auto;"> <figcaption>KiCad Result</figcaption> </figure> After taking a slight fork in the road, I decided to return once again to pcb work, something I'm not fully competent in (yet). Coincidentally, comma.ai released a challenge so I decided to test my boundaries and hopefully figure out what I need to work on. <p>If you don&rsquo;t know them, (pull up a browser now), comma.ai is a pioneering ai and self-driving company run by George Hotz, whom is also known for various &ldquo;hacks&rdquo;. They&rsquo;ve made Openpilot, a L2 operational self driving software that is a really nice open-source version of the things that other automotive manufacturers keep behind closed doors.</p>Building a BT macropad with the nRF52840Plushttps://johnhu.ca/posts/building-a-bt-macropad-with-the-nrf52840plus/Thu, 24 Sep 2026 22:00:00 -0400https://johnhu.ca/posts/building-a-bt-macropad-with-the-nrf52840plus/<div style="position: relative; padding-bottom: 56.25%; height: 0; overflow: hidden;"> <iframe allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share; fullscreen" loading="eager" referrerpolicy="strict-origin-when-cross-origin" src="https://www.youtube.com/embed/qJX9LS07LZ4?autoplay=0&amp;controls=1&amp;end=0&amp;loop=0&amp;mute=0&amp;start=0" style="position: absolute; top: 0; left: 0; width: 100%; height: 100%; border:0;" title="YouTube video"></iframe> </div> <p>I was interested in working with BT and NFC so what better way to experiment than to make a small keyboard. In the last iteration of my adventure with keyboards, I routed a ATMEGA328P by myself with no status LEDS, way to debug anything besides tracing with a multimeter so I resolved to create a working circuit board this time with some more proper documentation.</p>