19. Analog Rotation Potentiometer

19.1. Introduction

Analog Rotation Potentiometer can be rotated up to 300 degrees and the analog read value scope is 0~1023.


19.2. Characteristic

  • Designed in RJ11 connections, easy to plug.

19.3. Specification

Item Parameter
SKU EF05018
Connection RJ11
Type of Connection Analog output
Working Voltage 3.3V

19.4. Outlook


19.5. Quick to Start

Materials Required and Diagram

  • Connect the Analog Rotation Potentiometer to J1 port and the OLED module to IIC port in the Nezha expansion board as the picture shows.


19.6. MakeCode Programming

Step 1

Click “Advanced” in the MakeCode drawer to see more choices.


We need to add a package for programming, . Click “Extensions” in the bottom of the drawer and search with “PlanetX” in the dialogue box to download it.


Note: If you met a tip indicating that the codebase will be deleted due to incompatibility, you may continue as the tips say or build a new project in the menu.

Step 2

Code as below:



  • The detected value displays on the OLED screen.

19.7. Python Programming

Step 1

Download the package and unzip it: PlanetX_MicroPython

Go to Python editor


We need to add enum.py and trimpot.py for programming. Click “Load/Save” and then click “Show Files (1)” to see more choices, click “Add file” to add enum.py and trimpot.py from the unzipped package of PlanetX_MicroPython.

../_images/05001_081.png ../_images/05001_091.png ../_images/05018_10.png

Step 2


from microbit import *
from enum import *
from trimpot import *

trimpot = TRIMPOT(J1)
while True:


  • The detected value of the Analog Rotation Potentiometer displays on the micro:bit.

19.8. Relevant File

19.9. Technique File