ElectronBot
A tiny desk robot where every motor got its own brain.
- Cost
- not statedthe README gives no total
- Difficulty
- 5/5
- Build time
- Weeks
- Skills
- Custom PCBs · Fine soldering · Firmware
Made by Peng Zhihui · License GPL-3.0
The files are hosted by the maker. We never re-upload them.
What it is
A palm-sized desktop robot with a round screen for a face, arms that lift and twist, and a body that spins. Ordinary hobby servos can't report where they are, so the maker replaced each one's circuit board with his own, and now every joint reports its angle back.
How it works
- Six motors: head, two per arm (lift and twist) and the body spin.
- Each micro servo is hacked with a custom driver board (an STM32 chip) that reads the angle and runs its own control loop.
- The face is a round GC9A01 screen behind a 31.5 mm watch glass.
- Power and data reach the spinning body through a flexible ribbon cable from the USB-C port in the base.
What you need
- 5 custom circuit boards (Gerbers are in the repo)
- 6 micro servos to modify
- A round GC9A01 display
- Shell parts (the README suggests nylon printing)
Parts we use
- ServosSG90 9 g micro servoAmazon ★
- Hardware/toolsPinecil smart soldering ironAmazon ★
- 3D printingPLA filament 1.75 mm (Bambu Lab PLA Basic)Amazon ★
- 3D printingPLA filament 1.75 mm (Polymaker PolyLite PLA Pro)Amazon ★
★ = affiliate link. If you buy through it, we may earn a small commission at no extra cost to you. As an Amazon Associate we earn from qualifying purchases. Check the maker's bill of materials for exact quantities; prices change.
Is it for me?
Boss level. Amazing to study, but not a first robot: custom PCBs, hacked servos and fine soldering. The original docs are in Chinese, with an English README linked.
Official links
Summary written by us in plain words. Not affiliated with or endorsed by Peng Zhihui. Prices and links last checked Nov 3, 2026. Are you the maker and want something changed? Email us.