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I/O port to control 8 LEDs!
Hardware required
74HC595 chip*1
Red M5 LED*4
Green M5 LED*4
220Ω resistor*8
Breadboard*1
Breadboard jumper wires
Note: for pin 13 OE port of 74HC595, it needs to be connected to GND
Circuit connection
Connection for R3:
Connection for 2560 R3:
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