IMU

A long-range zoom camera pans two ways at once — by sliding a crop window across the sensor, and by physically rotating the gimbal underneath it. Here’s how to make one joystick drive both so the operator never feels the seam, the maths of the handoff, and the per-axis bug that kept the gimbal rolling after the stick let go.

A small AHRS was wired to a Jetson over USB, but nobody wrote down which serial port. Here’s how I tracked it down by its protocol instead of its name, fell into the classic dialout permissions trap, and decoded its orientation stream into human-readable numbers.