This is a VU-meter bargraph with up to 7 LEDs according the Power supply voltage. Adjusts are made by the potentiometer. The input impedance is high and in some cases a transformer must be used. Also a diode can be added in the input to source a direct signal to the circuit.
![LED VU Meter
LED VU Meter](/images/sampledata/cb/cb0480e_0001.png)
LED VU Meter