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Position Controller Kit

Product Code: 27906
Excl. VAT: £28.12 Incl. VAT: £33.74
You will earn 28 Robo Points for buying this product
Each Position Controller uses a quadrature encoder system to reliably track the position and speed of a wheel at all times. With the included plastic encoder disk, the Position Controller has a resolution of 36 positions per rotation; this equates to approximately 0.5 inches of linear travel per position using 6-inch tires (not included).

The Position Controller calculates and reports position and average speed data on command. This leaves the main processor free to handle more important tasks like reading GPS coordinates, processing sensor information, and manoeuvring complex environments.

The Position Controller is compatible with any microcontroller via a single-wire half-duplex asynchronous serial communication (UART) bus. Up to four Position Controller devices can be controlled on the same bus to minimize I/O requirements.

For increased functionality, multiple Position Controllers can be interfaced with HB-25 motor controllers (#29144; sold separately) to control the position of the wheel and automatically provide smooth speed ramping as well as accurate position advancement capability.


  • Single I/O line can control up to 4 Position Controllers 
  • 36 encoder positions per revolution 
  • Compatible with any microcontroller 
  • +5 volt Supply for Position Controllers 


Kit Contents:

  • Position Controller 
  • Plastic Encoder Disk 
  • 14" Servo Extension Cable 
  • 4/40 Phillips flat head screw 3/16" (x2)
  • Power requirements: 5 VDC
  • Communication: Single-wire TTL-level UART @19.2 kbits/sec
  • Dimensions: 50.8 x 26.67 x 12.45 mm
  • Operating temp range: -55 to +125 ┬░C

Product Attachments

View FilePosition Controller Kit Docs v1.1    Size: (356.15 KB)
View FilePosition Controller Sample Code    Size: (1.14 KB)

Whenever possible, items which are in stock are dispatched the same day, or the next working day.

Large and/or heavy items are dispatched by UPS courier service and these orders must be placed before 15:00hrs (GMT) to ensure same day dispatch.

Small items are normally sent using a Royal Mail service for UK orders, and International Airmail or UPS for overseas orders

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Position Controller Kit

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