19. Analog Rotation Potentiometer(EF05018)

19.1. Introduction

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

19.2. Products Link

ELECFREAKS PlanetX Trimpot Sensor

19.3. Characteristic

Designed in RJ11 connections, easy to plug.

19.4. Specification

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

19.5. Outlook

19.6. Quick to Start

19.6.1. 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.

19.7. MakeCode Programming

19.7.1. 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.

19.7.2. Step 2

19.7.3. Code as below:

19.7.4. Link

Link: https://makecode.microbit.org/_0Ff9eMJT2Y5F

You may also download it directly below:

19.7.5. Result

The detected value displays on the OLED screen.

19.8. Python Programming

19.8.1. 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.

19.8.2. Step 2

19.8.3. Reference

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

trimpot = TRIMPOT(J1)
while True:
    display.scroll(trimpot.get_analog())

19.8.4. Result

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

19.9. Relevant File

19.10. Technique File