Except from USB OUT, the OUT1-OUT3 can be turned ON/OFF by all 3.3V and 5V controllers (such

as Arduino, FireBeetle or Raspberry Pi etc.). Pull out the jumper on the blue header, the

corresponding output will be shutdown (LED indicator ON turns dark). Connect any IO and GND pin

of the controller to the EN and GND pin of the module respectively. When the IO pin is driven HIGH,

the regulated output turns on. When driven LOW, the output turns OFF. This function is extremely

useful in low power application. For example, connect all VCC and GND pins of the peripherals

(sensors or other modules) to the OUT1 and GND1 pins. Turn on OUT1 and read all the data from

the sensors. Turn off OUT1 and put the controller into sleep mode for example 1s until next wake up.

By cycling the system into such discontinuous (or pulse) operation pattern, the average power

consumption can be greatly reduced. Average power consumption and data acquisition interval are

the trade off under such situation.

Attention

Turn off OUT1 5V output will not turn off USB OUT 5V output, which CAN NOT be shutdown. 

The total output power of USB OUT and OUT1 should not exceed 5V*1.5A=7.5W. 

When OUT1 and OUT3 are turned ON, the corresponding GND1 and GND3 will be connected to 

the system ground GND. When they are turned OFF, GND1 and GND3 become floating 

(disconnected from GND). 

Regulated power supply