> **Source:** Core Electronics is an Australian maker-electronics retailer and manufacturer based in Newcastle, NSW, run by a team of makers and educators. We design and manufacture our own product lines (PiicoDev, CE originals) and are official retailers for iconic maker and industrial brands including Raspberry Pi, Arduino, Adafruit, SparkFun and DFRobot. Orders ship Australia-wide from our Newcastle warehouse. Prices are in AUD and include GST. Pricing, stock and dispatch on this page are generated from the store's live catalog. Full machine-readable index: https://core-electronics.com.au/llms.txt

# Servo Switch Harness 12"

**Type:** Product page · **SKU:** POLOLU-2170 · **Brand:** [Pololu](https://core-electronics.com.au/brands/pololu-australia)
**Page:** https://core-electronics.com.au/servo-switch-harness-12.html ([markdown](https://core-electronics.com.au/servo-switch-harness-12.html.md))

## Retired product

This product is retired and no longer available for purchase. Search the catalogue for an alternative.

## How to buy

- **Search the catalogue:** `https://core-electronics.com.au/search/{query}.md` (URL-encode the query; pages 2-3 at `search/{query}/{page}.md`; `search.md?q=` also works)
- **Payment methods, purchase orders, policies and contact details:** https://core-electronics.com.au/llms.txt
## Description

This 3-wire harness can be used to add a toggle switch between any two devices that can be connected with “JR” style servo connectors. One side of the switch has a lead with a female connector, while the other side has two leads, one male and one female.

Pololu sell two versions of this harness:

- [12 inches (30 cm) end-to-end, with lighter gauge cables and a smaller switch](https://core-electronics.com.au/servo-switch-harness-12.html)
- [18 inches (45 cm) end-to-end, with heavier gauge cables and a larger switch](https://core-electronics.com.au/servo-switch-harness-18.html)
 
A typical use for the harness in the RC hobby industry is to hook up a receiver battery to the male connector; the switch then controls whether current flows to the rest of the circuit through the female connector on the opposite side, while the female connector on the same side can be used to charge the battery without disconnecting it from the circuit.

Note that the RC hobby industry often reverses the convention of “male” and “female” servo connectors:

 | \| [![](https://core-electronics.com.au/media/remote_images/0J653.300_tW1CjJ.jpg%3F59a4e9531bde956579168486e243773c)![](https://core-electronics.com.au/media/remote_images/zoom-d0cfc0fffa825c4654893ef42b77cee3_0TLVBw.png)](https://core-electronics.com.au/#) \| \|---\| \| RC servo extension cable male JR connector (often referred to as “female” in the RC hobby industry). \| | \| [![](https://core-electronics.com.au/media/remote_images/0J652.250_GWfdjT.jpg%3F15b0cad479396579bedf25744a17994d)![](https://core-electronics.com.au/media/remote_images/zoom-d0cfc0fffa825c4654893ef42b77cee3_0TLVBw.png)](https://core-electronics.com.au/#) \| \|---\|---\| \| RC servo extension cable female JR connector (often referred to as “male” in the RC hobby industry). \| |
|---|

### Servo cable color convention

- brown or black = ground (GND, battery negative terminal)
- red = servo power (Vservo, battery positive terminal)
- orange, yellow, or white = servo control signal line

## Images

- [Product image 1](https://core-electronics.com.au/media/catalog/product/s/e/servo_switch_harness_12_inch__pololu_2170__00.jpg)