This product is a Micro:bit expansion board designed with PCA9685 as the core chip, integrating multi-channel motor and servo drives, full-color RGB LEDs, Sound volume level detection, 18650 battery management circuit, buzzer, etc., and from Micro:bit Lead out some GPIOs to support common electronic modules on the market; 18650 battery management circuit integrates lithium battery boost, charging management and protection chips, and supports micro USB interface charging at the same time. We provide python and makecode demo codes.
Features
Onboard Micro:bit edge connector, can be directly plugged in for use
Onboard 7 RGB LEDs, a buzzer with control switch
Onboard 18650 battery holder with Battery Act button, which can wake up the battery with one button
Onboard power switch
Lead out 4 sets of motor and 8 sets of servo drivers pins
There is a microphone with an amplifier circuit on board, which supports Sound volume level detection
Lead out the I2C pin
Provide open source demo codes that can be used in python and makecode
Onboard Micro:bit edge connector, can be directly plugged in for use
Specifications
Size
77.80mm x 57mm
Power Supply
5V (3.5mm-2P terminal) or 3.7V～4.2V (18650 lithium battery)
Operating Voltage
3.3V/5V
External power input
KF128L-3.5-2P（DC5V）
Charging batteries
Micro USB（DC5V）
GPIO expansion quantity
8
Number of RGB LEDs
7
Buzzer
1
I2C interface
1
Number of servo drivers channels
8
Number of motor drivers channels
4
Resource Profile
1. Motor 1 header
2. 5V header
3. Onboard buzzer switch
4. 5V input terminal
5. USB charging port
6. Lead out part of GPIO and 3.3V, GND
7. Microphone volume selection connection pin, short circuit means connected to P1 pin, open circuit means not connected to P1
8. Onboard buzzer
9. 8 sets of servos driver header
10. Power switch
11. LED indicators, from top to bottom are power indicator, battery charging indicator, battery fully charged indicator
12. Lead out I2C pin header
13. Motor 2 header
14. Microphone
15. 18650 battery holder
16. 7 WS2812B full-color RGB LEDs
17. Micro:bit edge connector
18. 18650 battery activated button
19&25. Dual-channel H-bridge motor driver chip AT8833
