Three simple PCB's with 7-segment displays and an LED bar graph. Also included is a speaker and driver for alert tones. Type B is a general purpose display with power and signal connections available ...

There are 10 discrete LED bars in the LED bar graph: one red, one yellow, one light green, and the rest green. For more information, please refer to the wiki. This software is written by Frankie Chu ...

This VU meter uses Nixie tubes as the display. There are a total of fourteen IN-13 bar graph tubes that map out the audio spectrum. The build uses purely hardware for the display; no ...