The module is soldered with red LED lights, all LED lights are connected with the positive poles, so the light is on when the IO port outputs low level; the four positioning holes are in the same position as the positioning holes of the Raspberry Pi, and they can be directly fixed on the Raspberry Pi, and the appearance is neat and tidy. , Easy to use.
Features
Can be used to test the working status of the Raspberry Pi lO port;
LED common anode, 3.3V or 5V can be selected to power the LED;
Multi-lead power pins to facilitate connection to peripheral devices.