Why you can blank, void setup()
Driving a Single Digit 7 Segment LED Display requires 8 of an Arduino's 20 or so I/O pins. Using a 74HC595 shift register only requires 3.
by Mel Lester Jr
A freeform interactive snowflake animated by Arduino Nano. Using 17 independent PWM channels and touch sensor it can create awesome effects!
Project tutorial by Jiří Praus
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