• Servo Power Adapter 7.4 V / 8.4 V 3 A, DC 5.5×2.1 mm, 100–240 V, for 7.4 V Bus Servos and SO-ARM101 Leader Arm
  • Servo Power Adapter 7.4 V / 8.4 V 3 A, DC 5.5×2.1 mm, 100–240 V, for 7.4 V Bus Servos and SO-ARM101 Leader Arm
  • 7.4 V servo power adapter – the adapter powering a small white 3D-printed desktop robot arm on a desk
  • 7.4 V servo power adapter – product still life on white: the adapter with its cables neatly coiled
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Glunova Biotech

Servo Power Adapter 7.4 V / 8.4 V 3 A, DC 5.5×2.1 mm, 100–240 V, for 7.4 V Bus Servos and SO-ARM101 Leader Arm

Servo Power Adapter 7.4 V / 8.4 V 3 A, DC 5.5×2.1 mm, 100–240 V, for 7.4 V Bus Servos and SO-ARM101 Leader Arm

$23.00 SGD
$23.00 SGD
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Output

This is a regulated 7.4 V (or 8.4 V) 3 A DC power adapter with a 5.5 × 2.1 mm barrel plug that replaces a 2S LiPo battery for bench-powering 7.4 V bus servos such as the Feetech STS3215-C001/C044/C046 used in SO-ARM101 leader arms, LeKiwi and OpenDuck builds.

A regulated 7.4 V (or 8.4 V) 3 A supply for the 7.4 V Feetech STS3215 servos used in SO-ARM101 leader arms, LeKiwi and OpenDuck builds. It replaces a 2S LiPo on the bench so you can run and calibrate servos all day from mains power. For 12 V servos and follower arms use a 12 V 5 A adapter instead.

What can you use it for?

  • Powering the 7.4 V leader arm of an SO-ARM101 / SO-101 pair
  • Bench testing and calibrating 7.4 V STS3215 servos before assembly
  • Running OpenDuck Mini or other 2S-servo robots from mains during development
  • 8.4 V version for projects that expect a fully charged 2S pack

Who is it for?

LeRobot builders and robotics students who buy servos separately and need a safe supply for the 7.4 V models without draining LiPo packs.

Compatibility

  • Feetech STS3215 7.4 V models (C001, C044, C046) and other 6–8.4 V servos
  • Waveshare Bus Servo Adapter, BusLinker V3.0, FE-URT-1 (barrel jack)
  • Not for 12 V servos (STS3215-C018, STS3250): use a 12 V 5 A adapter
  • Mains plug: two flat pins (US / CA / JP / CN); use a travel adapter in EU / UK / AU

Specifications

Output 7.4 V DC 3 A (22 W) or 8.4 V DC 3 A (25 W), regulated
Input 100–240 V AC 50/60 Hz, universal
Plug DC 5.5 × 2.1 mm barrel, centre positive, 1.5 m cable
Mains plug Two flat pins (fits US / CA / JP / CN sockets; adapter needed for EU / UK / AU)
Protection Over-current, over-voltage, short-circuit, over-temperature
Certification CCC
Use Feetech STS3215 7.4 V models (C001/C044/C046), SO-ARM101 leader arm, 2S servo projects

What's in the box

  • 7.4 V 3 A (for 7.4 V servos): 1 × 7.4 V 3 A adapter with fixed mains cable and 1.5 m DC lead
  • 8.4 V 3 A (2S LiPo-equivalent): 1 × 8.4 V 3 A adapter with fixed mains cable and 1.5 m DC lead

Frequently asked questions

Which voltage do I need?

7.4 V for the 7.4 V STS3215 models and the SO-ARM101 leader arm; 8.4 V only if your controller expects a fully charged 2S pack. Never feed either to 12 V servos, and never feed 12 V to 7.4 V servos.

Is 3 A enough for six servos?

For a leader arm that is moved by hand, yes: the servos are mostly reading position. For a 7.4 V follower doing real lifting, use two adapters or a 5 A supply.

Does the plug fit my socket?

The cable ends in a two-flat-pin plug used in the US, Canada, Japan and China; input is 100–240 V so it works anywhere with a simple plug adapter.

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