Moss v1 vs SO-100 (SO-ARM100)
Cost, parts and difficulty side by side.
| Moss v1 | SO-100 (SO-ARM100) | |
|---|---|---|
| Cost | $288 to $360 | $232 to $330 |
| Difficulty | beginner | beginner |
| Parts | 9 | 6 |
| 3D printing | yes | yes |
| Kits available | 0 | 1 |
| Made by | Jess Moss | TheRobotStudio and Hugging Face |
| Full list | Moss v1 parts list | SO-100 (SO-ARM100) parts list |
Moss v1
Metal-bracket STS3215 leader and follower arms for LeRobot; still supported but deprecated in favor of SO-100/SO-101.
SO-100 (SO-ARM100)
The original LeRobot leader and follower arm pair; now deprecated in favor of SO-101 but uses the same servos.
The short answer
SO-100 costs less to start: about $232 against $288 in parts. SO-100 has the shorter parts list (6 lines against 9). Both are rated beginner.
Motors and servos
Moss v1
- 12 x Feetech STS3215 7.4V (C001, 1/345)
- 2 x 5V power supply
SO-100
- 12 x Feetech STS3215 7.4V (C001, 1/345)
- 2 x 5V power supply, 5.5x2.1 mm barrel
Parts both builds use (2)
- Feetech STS3215 7.4V (C001, 1/345)
- USB-C cable 2-pack
Building both? These parts carry over, so buying for one covers part of the other.