Energy saving running LED bar graph
See the whole article here:
https://www.avdweb.nl/arduino/hardwar...
A LED bar graph is normally lit continuously. This is not useful for applications that need low energy consumption. That's why I made a LED bar graph that uses less energy. Instead of lit the LEDs continuously, the LED bar graph works as a running light whereby the last LED, which indicates the actual level, lit a little bit longer. The code shown is for a LED bar graph with 5 LEDs.