This circuit monitors an audio signal and displays it on a 10 LED bar display.
There are two modes the display can operate.
- DOT mode - where a single LED in on.
- BAR mode - where a bar of LEDs appear as the signal increases.
The sensitivity of the display is set by VR1. Turn clockwise to increase sensitivity.
Set the gain by turning VR1.
Set close to, but not at maximum.
Set the speed of the changing signal by adjusting VR1 (Decay). Set midway to start with..
LED BAR DISPLAY:
Select DOT or BAR mode by moving the jumper.
Turn VR1 clockwise to increase sensitivity. Set midway to start with