Mini wifi Router UPS Borad 52W V3 3.7V-4.2V Battery 3A Fast Charging price DIY electronics and prototyping projects

DIY electronics and prototyping projects

consult a resistor color code table like the one above

S2 S3 Photodiode type Low Low Only red light Low High Only blue light High Low No filter High green light By combining the reading of each of the three colours

connect it to the USB cable

the MCU pin is connected through the resistor to 5V

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