atomicrajat@edge

$ cd ~/notes

Notes

Small things worth writing down once so I never lose an hour to them again.

audiocameraelectronicsjetpackjetsonlinuxservossystemd
  1. 2026.08.10Getting the power button to work on a Jetson Orin NanoI wired a button to J14 on my Orin Nano and nothing happened. It wasn't the wiring — GNOME was quietly swallowing the press.
  2. 2026.07.23Never power servos from the Jetson railSix SG90s will brown out a dev kit. Separate 5 V supply, common ground, and a 1000 µF cap across V+.
  3. 2026.07.22A USB webcam is a fine Jetson microphoneIf you're already using a CSI camera for vision, the spare USB webcam is the easiest ALSA capture device you'll find.
  4. 2026.07.22IMX219 on CAM1 needs the Camera IMX219-C overlayA CSI camera that shows up as nothing on JetPack 6.1 is usually a missing device-tree overlay, not dead hardware.