Chip
Cute Humanoid Interactive Pal
26 June 20233 minute read
By Kevin McAleer
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Chip the Cute Humanoid Interactive Pal
Meet Chip
Chip the Cute Humanoid Interactive Pal, is a small, 3d printable robot you can build yourself. Its powered by the Pimoronoi Servo 2040 (there aren’t many boards that have 18 Servo sockets), and programmed in MicroPython.
Inspiration and idea - Why I designed this robot
I want to make a small bipedal robot for experimenting with walking and gestures. I also want to make one similar to:
- Plen
- Robosen
- EZ-Robot
- Called Chip - because it will sit on my shoulder…
Chip will be made up of:
- 19 Servos (Yikes - will be expensive)
- 3D printable
- Powered by RP2040 based Pimoroni Servo 2040
- MicroPython
- Detects movement and responds
- Capable of many gestures; Walking, Pointing,Waving, Clapping, Running, Crawling
Electronics - Bill of Materials
To build Chip you’ll need the following parts:
| Part | Description | Qty | Cost |
|---|---|---|---|
| Servo | DS 929MG Servos | 19 | £9.90 |
| Servo Driver | Pimoroni Servo 2040 | 1 | £20.00 |
| Range Finder | HC-SR04 Range Finder | 1 | £6.00 |
| Battery pack | TBC | 1 | £0.00 |
3D Design - Fusion 360
Here are all the 3d printable parts that make up Chip
| Part | Description |
|---|---|
 |
Houses the Arm, Leg and Neck Servos, M2 Screw holes for servos, 4x M3 for the Torso cover |
 |
Protects Servos, Screws in with 4x M2 screws, Belly button |
 |
Connects to Arm Servo on Torso, Connects to Arm Assembly |
 |
Connects to Arm Servo on Torso, Holds two servos |
 |
Connects to Arm Servo on Torso, Holds two servos, Connects to Hand |
 |
Connects to Arm Servo, The sound of one hand clapping |
 |
Connects to Leg Servo on Torso |
 |
Holds two servos at 90 degrees from each other, Pivots in 2 DOF, No top cover required as the servos connect to the respective servo pivots on the attached pieces, These are used in the upper and lower leg |
 |
Hinge with Servo at 90 degrees |
 |
Connects lower leg to Foot |
 |
Connects Shin to foot, Holds 2x Servos |
 |
Completes the Leg Assembly, 1 Degree of freedom |
 |
5x Servos per leg, 6 degrees of freedom including the Hip servo |
 |
18 Servos for the full body, Hands can touch, Legs can sit, crawl, stand, walk |
 |
Holds the Ultrasonic Range Finder Sensor, Attaches to Neck servo |
 |
Head contains a Range finder, Head can turn 180 Degrees left to Right |
Future plans
I’ve a couple of plans for Chip -
- Walking Cycle with IMU for Balance
- Fun Animations & Behaviours
- MicroPython Library for Chip
- Course on KevsRobots.com on how to build
Download the 3D printable STL files
To make printing the files easier, I’ve bundled the mirrored parts together:
- chip_arms.stl - Arm servo holders
- chip_feet.stl - Feet
- chip_head.stl - Head
- chip_torso_cover.stl - Torso Cover
- chip_torso.stl - Torso
- chip_double_couplers.stl - Double Couplers
- chip_hands.stl - Hands
- chip_hips_and_shoulders.stl - Hips and Shoulders
- chip_knees_and_shins.stl - Knees and Shins
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Kevin McAleer
I build robots, bring them to life with code, and have a whole load of fun along the way
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