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9V battery with dc High quality kit with UNO board, compatible with Arduino UNO R3, UNO R4, MEGA 2560 R3, NANO.
Power Supply (x1): 5V–12V DC adapter for powering the Arduino ... wiring connection used in the RFID attendance tracker system, starting from the Arduino UNO. Digital Pin 11 MFRC522 MOSI SPI Data Out ...
An Arduino Uno (CH340G clone) reads temperature and humidity from a DHT11 sensor and computes 10+ environmental metrics (heat index, dew point, enthalpy, humidex, vapor pressures, etc.), outputting ...
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