4. Octopus ADKeypad(EF04017)

4.1. Introduction

  • This keyboard uses an analog input to read the five key state with one IO port.

  • It can achieve many amazing interactive projects.


4.2. Characteristics

  • The 3-pins ports is easy to plug and play..

  • It can work with micro:bit in 3V.

4.3. Specifications

Item Parameter
SKU EF04017
Power Input 3V-5V
Connector Type Analog
Pins Definition 1-Signal 2-VCC 3-GND
Response Quick to response with high sensitivity
Circuit Simple
Stability Stable and durable

4.4. Outlook and Dimensions


4.5. Quick to Start

Connection diagram

  • Connect to P1 port as the picture shows.

Take sensor:bit for example


Program as the picture shows

  • Analog read the returned value.

  • When returned value is between 0~20, it means the button A is pressed, an icon is shown on the micro:bit.

  • By parity of reasoning.




You can also download it directly below:


  • Press different buttons on the ADKeypad, different graphs show on the micro:bit.

4.6. Relevant Cases

4.7. Technique Files