One board for your small robot
Your robot's brain is a stack: a Pi, a HAT, a buck converter, a servo driver and a nest of jumper wires. Send us the parts list. We design one board that does all of it and fits the space inside your robot.
Write your board brief
Why a stack fails in a small robot
It does not fit. A Pi with a HAT is 65 x 56 mm and over 20 mm tall with headers. In a head or a torso shaped by the design, that height decides the shape of the whole robot.
The wires come loose. A walking robot shakes. Jumper wires and header pins between boards are the first thing to drop out, and a dropped servo line means a fall.
Power is an afterthought. Servos pull hard when they start. A small buck module that sags under that load resets the computer in the middle of a step.
The first one is our own
Huey is a small two-legged robot with 15 bus servos. Its old head held a single-board computer and a HAT standing on end. The new head board puts it all on one carrier:
- 61 x 68 mm carrier, lying flat in the printed head
- Radxa CM3 compute module on top, with a heatsink
- 3 A 5 V supply on board (AP63300), sized for the computer under servo load
- Fit measured in the printed head's 3D model before layout started
Where it stands today, 15 October 2026: the schematic is done and the layout is in progress. We will post the first boards here when they are back from the factory.
What you get
- A fit check first
- We put your robot's 3D model and the board outline together before any schematic, so the board is shaped to the space you have.
- Schematic and layout
- KiCad files that are yours to keep: compute, servo bus, IMU, power and the connectors your robot needs, nothing more.
- Boards made and tested
- Made and assembled in Shenzhen. We sit in Huaqiangbei, next to the parts market, so a missing part is a walk, not a week.
- Files for your enclosure
- A STEP model of the finished board, so your printed parts fit it the first time.
Write your board brief
Fill in what you know. The card on the right is what we read; skip anything you are unsure of.