SummaryMagnetic encoders can provide very high angular resolution (up to 16 bit) and provide an absolute angle measurement. But you need to hold the magnet to the motor shaft and keep the sensor chip close to the magnet surface. That is the purpose of the these two parts. You can adapt it to other motors from the source project I created here: https://cad.onshape.com/documents/0acf1827233346b9ba139ed7/w/f650e400c4494ff2be283905 PCB for encoder chip http://www.ebay.com/itm/20x-SOP8-SO8-SOIC8-TSSOP8-MSOP8-To-DIP8-Adapter-PCB-DIY-Conveter-Board-FKS-/321850262095?hash=item4aefc5424f:g:RbIAAOSwjVVV5Vs5 And it works: https://www.youtube.com/watch?v=E-Cg7BhvDwY&feature=youtu.be quite nicely