PicoClaw

A sub-30mm 3D-printable robotic gripper optimized for the Raspberry Pi Pico and standard micro servos.

PicoClaw delivers reliable mechanical gripping in a frame smaller than a standard matchbox. This open-source design uses a rack-and-pinion mechanism to convert micro-servo rotation into a 25mm parallel stroke. It runs on a single SG90 or MG90S motor: no screws required for assembly (the parts use integrated friction-fit pins). Weighing less than 15 grams, it mounts directly to a Raspberry Pi Pico (RP2040) for streamlined pick-and-place tasks or mobile robotics. It is a clean, three-wire solution for tight-clearance automation.

https://github.com/TheSmallestGripper/PicoClaw