Reference

User Guide

• Switch to RUN/PROG
  The new extension board adds a switch to Run and Download the program. When you download the code, please dial it to "PROG". When running, dial it to the "RUN".
  Users who have used V5 may know that when using XEee these communication modules, because of serial usage conflicts, we need to unplug the communication module to download the code. While in the 7.0 version, we just need to dial the switch.

• Switch to output 3.3V/5V
  The jumper cap can be used to select whether the output power supply is 5V or 3.3V. It is easy to power sensors that require a 3.3V power supply. If there is no jumper cap, the VCC pin output voltage is 0.

• Stable 3.3V Output
  This power output is different from the output voltage of other VCC pins. Other VCC pins are related to the previous power jumper cap selection, but this is not, it is a constant 3.3V output voltage.

• External Input Power Supply(6V to 12V)
  An external input power supply interface is provided, and the figure above shows that there are two interfaces to choose from, but the input voltage should be controlled within 6V to 12V.

• Servo Input Power Supply(5V to 12V)
  The digital pins can be connected to an external power supply within 5V to 12V.

Two Available Situations
1.There are device connected to digital pins, such as in some robot platforms that use multiple servos, resulting in a situation where the current is too low to work properly. In this case, the current can be replenished by a 5V external power supply.
2.When the digital pin is connected to a device that requires a larger power supply, it can be connected directly to a 5 to 12V extenal power supply in this interface.