A servo extension lead adds length when a servo's own lead won't reach the receiver or servo board. This one adds 150mm. One end has a small servo-style plug with metal sockets inside, which pushes onto three header pins on a receiver or servo board. The other end has an open receptacle, and your servo's plug pushes into it.
Neither end has a polarity tab, so the lead fits JR, Futaba and Hitec style servos and receivers. The catch is that a plug will also go in upside down, so line up the colours at each join: black goes to black or brown, red to red, and white to white, orange or yellow. For a longer run, plug two leads together end to end.
Specifications
Wiring & getting started
Wiring diagramServo extension
- Switch the power off
Unplug the battery or USB before you join or remove any servo lead.
- Find the signal wire on your servo
The lightest wire is signal (white, orange or yellow), red is positive and the darkest is negative (black or brown).
- Push the servo plug into the receptacle
Put the servo's signal wire on the same side as the extension's white wire, then push until it sits fully home.
- Plug the other end onto the receiver
White goes on the signal pin and black on negative. Receivers and servo boards mark the rows S, + and - or SIG, V+ and GND.
- Hold the joint together
Wrap a turn of tape or fit a servo lead clip over the join, so vibration in a model can't work it apart. Keep the lead clear of moving linkages and sharp edges.
- Check it works
Power up and move the stick or run your test code. The servo should move as it did without the extension. If it does nothing, one plug is upside down or not pushed fully home, so switch off and turn it over.