He’s using an Arduino Mega to drive the 7x7x7 cube ... straightened by stretching the wire. The 5mm Blue LED’s are positioned 30mm apart, with the anodes being attached to the verticals ...

First, upload the following PWM sketch to your Arduino Uno r3/Nano v3 and connect a 10mm water-clear green LED to D9. const int ledPin = 9; // Test LED wire to D9 void setup() { // Set the pin as a ...

The image shown below indicates the basic wiring diagram of the current limiting resistors and driver transistors. Next is the Hookup diagram of the Arduino 4-Digit 7-segment LED Display, followed by ...

The LED also shows a blink pattern if the coil is open, too short, too long, or has too much resistance. The biggest problem is that the poor Arduino needs to measure delays down in the nanosecond ...