Feetech STS3250 serial bus servo
by Feetech. Used in 2 builds listed here.
Where to buy
Alibaba: check price (unverified) single; HopeJR BOM link OpenELAB: EUR 75.85 (unverified) WowRobo: check price (unverified) single; XLeRobot BOM link
Specs
| voltage | 12V (6 to 12V) |
| stall_torque | 50 kg.cm at 12V |
| gear | 1/345 (C002) |
| interface | TTL serial bus, same protocol as STS3215 |
Variants (pick the right one)
- code: C002, voltage: 12V, gear: 1/345, stall_torque: 50 kg.cm
Mistakes to avoid
- Same footprint and bus as the 12V STS3215, so it drops into SO-101 style joints, but needs a 12V supply.
- XLeRobot lists it only as an optional upgrade: about 1.5x the torque for about 3x the price.
Builds that use it
HopeJR Arm (with Homunculus teleop)
advanced · $650 to $1,100
Human-scale arm with a tendon-driven dexterous hand, plus a hall-sensor exoskeleton and glove for one-to-one teleoperation in LeRobot.
XLeRobot
intermediate · $660 to $1,000
Dual-arm household mobile robot built from two SO-101 arms, a LeKiwi-style base and an IKEA cart, starting near $660.