Here is a simple, yet useful circuit of an Arduino 4-digit 7-segment LED display unit. The module used here is ... D13 of the Arduino is reserved for the decimal point segment. The 10K potentiometer ...

This is an easy tutorial showing how you can control the brightness of an LED or adjust the speed of a DC fan using Arduino Board, a small BC547 transistor and a potentiometer ... as a voltage divider ...

To the human eye, it looks like multiple LED’s are lit up simultaneously. [Alex] planned to use an Arduino to control this display, but it doesn’t have enough outputs on its own to control all ...

[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 ...