Micro:bit Expansion Board PCA9685
Overview
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
Specifications
| Size | 77.80mm x 57mm |
| Weight | 34g (without battery) |
| 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 RGBLEDs | 7 |
| Buzzer | 1 |
| I2C interface | 1 |
| Number of servo drivers channels | 8 |
| Number of motordrivers 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
- 20. 5V to 3.3V chip: AMS1117-3.3
- 21. PCA9685
- 22. Lithium battery charging management chip: TP4056
- 23. Microphone volume gain adjustment resistor
- 24. Microphone preamplifier chip MAX4466
Wiki
Package Contents
SG-EMIB-01A x 1