Add sensor power switch circuit, e.g. for multiple [A02YYUW / DFRobot SEN0311 Ultrasonic Distance Sensors](https://wiki.dfrobot.com/_A02YYUW_Waterproof_Ultrasonic_Sensor_SKU_SEN0311). 
Add sensor power switch circuit, e.g. for multiple A02YYUW / DFRobot SEN0311 Ultrasonic Distance Sensors.