This is the Wheel Encoder Kit from DAGU, a simple add-on to any wheeled robot that can help measure the speed or distance the chassis travels. Each wheel encoder kit consists of two neodymium 8-pole magnets with rubber hubs and two hall-effect sensors terminated with 150mm cables and 3-pin female servo headers. These wheel encoders require a supply voltage of 3-24V with a supply current of 4mA.
- Supply Voltage: 3-24V
- Supply Current: 4mA per sensor
- Output Voltage: 26V Max
- Output Current: 25mA Continuous
- [Datasheet](http://cdn.sparkfun.com/datasheets/Robotics/multi-chassis encoder001.pdf)
- RedBot Assembly Guide