KNIGHT RIDER LEDS (CYLON EYE)

• Arduino Uno & USB Cable
• Breadboard
• 4 LED or more
• 4 220 ohm resistors
• Jumper wires

TIP: There are just 3 GND pins on the Arduino. Does it mean that more than 3 led cannot be turned on?

The Circuit:

CODE WITH MBLOCK

VIDEO

By this way, 9 jumper Cables were used in this circuit.

This another circuit used less jumper cable (5) for the same target!!!

VIDEO: