# RGB LED 'OWire' - 2 Pin PTH 4mm Concave

**Type:** Product page · **SKU:** COM-21209 · **Brand:** [Sparkfun](https://core-electronics.com.au/brands/sparkfun-australia)
**Page:** https://core-electronics.com.au/rgb-led-owire-2-pin-pth-4mm-concave.html ([markdown](https://core-electronics.com.au/rgb-led-owire-2-pin-pth-4mm-concave.html.md))

## Retired product

This product is retired and no longer available for purchase. Replaced by: COM-12999.

**Replacement:** https://core-electronics.com.au/catalog/product/view/sku/COM-12999

## Description

Have you ever seen those strings of fairy lights, or pre-lit Christmas trees, that change colors with a little remote? Have you ever noticed that they only have two wires? How do they do that? Well it turns out that this is how: Special LEDs! These 4mm LEDs are like a compromise between color cycling LEDs and fully addressable LEDs. While you aren't able to individually address each LED in the chain, you *can* change the color and mode of *all* LEDs in the chain. Sparkfun call these "OWire" LEDs because there's no "signal" wire, just power and ground. In order to change modes you wiggle the power LED in in a 7-bit pattern depending on the mode/color you want. Don't worry, we've written an Arduino library! A single LED will run just fine from a GPIO pin, but if you want to put a lot of LEDs in parallel, you'll want to use a MOSFET to signal the power rail. Check the documents for an example schematic.

 Features - 4mm PTH LED with Concave Lens
- 2 Pins
- Forward Voltage: 3.2VDC
- 8 Modes and 7 colors (plus color combos)
 
 Documents - [OWire LED Datasheet](https://core-electronics.com.au/attachments/localcontent/0-Wire_RGB_LED_Datasheet_29684935431.pdf)
- [OWire LED Signaling Protocol](https://core-electronics.com.au/attachments/localcontent/CZineLight_0-Wire_Communication_Protocol_1445002e9eb.pdf)
- [Arduino Library](https://github.com/sparkfun/SparkFun_OWire_Arduino_Library)
- [Example Schematic](https://core-electronics.com.au/attachments/localcontent/OWire_Example_30045ab5e61.pdf)

## Images

- [Product image 1](https://core-electronics.com.au/media/catalog/product/C/O/COM-21209-1.jpg)