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.

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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


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4.5. Quick to Start


Connection diagram

  • Connect to P1 port as the picture shows.

Take sensor:bit for example

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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.

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Reference

Links:https://makecode.microbit.org/_dqjTtAM5sfmy

You can also download it directly below:

Result

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

4.6. Relevant Cases


4.7. Technique Files