Reference
Last revision 2025/12/29
- Operating Voltage:
The operating voltage of DFRduino M0 is 5V, so the extended board supports 5V digital sensors only. The analog input pin of the expansion board can endure 0~5V.
- LED ' L ':
A LED is designed on the extension board, which is connected to the digital pin 13 (LED).
- Gravity Color-coded 3-Pin interface:
Color description:
| Color | Description |
|---|---|
| Green | digital signal (Digital Signal) |
| Blue | analog signal (Analog Signal) |
| Red | power VCC (power supply via Servo Power port) |
| Black | grounding GND |
- Serial port and I2C port:
The expansion board provides 2 serial ports and one I2C interface, in which the two serial ports are independent.
- External input power supply (7~23V):
Provides external power input interface, external input power supply has two kinds of interface can choose, can input from the floor or by the expansion board input (not at the same time, input) input voltage is controlled in 7~23V. when the USB and the external input power supply at the same time, it will automatically switch to the external input power supply.
- Servo power input (5~7V):
The IO expansion Shield has an external servo power port. It could provide enough power resource when you want to do drive a lot of device together. Especially servo motor. Once you connect >5V to the port. it will auto switch power resource.
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