General Purpose Input Output Arduino Shield

This example shows technique for calibrating sensor input and shows the sensor outputs by controlling LEDs and SSD, also shows how to monitor the state of a switch. Hardware Required 8 LEDS 2 push button switches 2 sliding switches 4-SSD with MAX7221/7219 LM35 Speaker Circuit In this circuit according to the above diagram 8 LEDs were connected to the Arduino digital pins 2 to 9. Pin 2 is the LSB and pin 9 i ...

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