of the 4×7 LED display. Note that here the decimal point (dp) option is not used, but included in the sketch. D13 of the Arduino is reserved for the decimal point segment. The 10K potentiometer is ...

You can adjust the spinning speed with a potentiometer and you can also set a minimum and maximum speed in the code. You will need an Arduino board ... is used in the delay() to control how much time ...

Pulse Width Modulation is definitely the preferred method of dimming an LED with a microcontroller, but we were interested in hearing about a different method called Binary Code Modulation.

[Christian] wrote in to tell us about his third-generation Arduino MIDI sequencer (translated ... components seen above include the slider and potentiometer band, as well as the repository ...