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Green PCB expansion board with 18650 battery holder, motor and servo pins, microphone and RGB LEDs

LORDWORLD

LORDWORLD RobotBit Expansion Board PCA9685 18650

SKU CH-0XMY-Y3RYS

Expansion board for Micro:bit adds PCA9685 motor and servo control, sound detection, and an 18650 battery holder with one-button wake

  • PCA9685 chip drives four motors and eight servos
  • onboard microphone detects sound volume levels
  • 18650 battery holder includes one-button wake function
  • expansion board built for Micro:bit projects
  • all driver pins led out for direct connection

IoT Edge Device for Micro:bit

This LORDWORLD expansion board is built around a PCA9685 core chip and is made for makers who want to add motor and servo control to a Micro:bit project. It provides four motor driver pin sets and eight servo driver pin sets for multi-axis robots or kinetic art. An onboard microphone with an amplifier circuit enables sound volume level detection. An embedded 18650 battery holder includes a Battery Act button to wake the cell with one press.

Check Micro:bit Compatibility and Power Needs

Before ordering, verify that your Micro:bit version matches the board's edge connector pinout and voltage requirements. Confirm you have a suitable 18650 cell with the correct polarity and protection circuit for the onboard holder. Ensure your code environment can address the PCA9685 over the available bus and that the current draw of all connected motors and servos stays within the board's trace and connector limits.

Sustained Load Behaviour

During extended operation the PCA9685 drives multiple channels continuously, so the board's thermal performance depends on airflow around the chip and the current rating of each motor or servo channel. The 18650 cell voltage will sag under heavy simultaneous motor loads, which can reduce torque or trigger the Battery Act button's wake function if the cell dips too low. Plan duty cycles and cooling so the driver chip and battery stay within safe operating temperatures.

How it compares

Measured against everything we stock in Single-Board Computers & Dev Kits, at today’s prices. Recalculated every night.

Price $66.99
Pricier than about 69% of the 1,420 comparable items (median $44.99).

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Specifications

Product
Brand nameLORDWORLD

Questions about this item

Does the RobotBit board include the Micro:bit or 18650 cell, or must I buy them separately?

The board is an expansion for a Micro:bit and has an embedded 18650 holder; the Micro:bit module and the 18650 battery are not included and must be purchased separately.

How many motors and servos can the PCA9685 chip on this board drive at once?

The PCA9685 core provides four motor driver channels and eight servo driver pins, all broken out on the board for simultaneous use.

What does the onboard microphone and Battery Act button actually do in a robot project?

The microphone with its amplifier enables sound volume level detection for voice-reactive code, while the Battery Act button wakes the 18650 cell with one press so the robot powers up instantly.

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