23 Jul 2026electronicsservosjetson
Never power servos from the Jetson rail
Six SG90s will brown out a dev kit. Separate 5 V supply, common ground, and a 1000 µF cap across V+.
Six SG90s stalling at once pull far more than the Jetson's 5 V rail wants to give. The board resets mid-motion and you spend an hour blaming your code.
- External 5 V supply, ≥ 3 A (≥ 5 A for six servos)
- Common ground between the supply, the PCA9685 and the Jetson
- 1000 µF electrolytic across the PCA9685
V+/GNDto absorb the inrush