LED VU Meter


Posted on Feb 5, 2014

The circuit below uses two quad voltage comparators (LM339) to illuminate a series of 8 LEDs indicating volume level. Each of the 8 comparators is biased at increasing voltages set by the voltage divider so that the lower right LED comes on first when the input is about 400 millivolts or about 22 milliwatts peak in an 8 ohm system


LED VU Meter
Click here to download the full size of the above Circuit.




Leave Comment

characters left:

New Circuits

.

 


Popular Circuits

Guitar Reverb Effect
Line Following Robot Sensor
Radio Frequency Circuits
multivibrator astable
Sensor Alarm using thyristor circuit
audio-circuits
mains operated led night lamp
Jogging Timer
Complementary symmetry FET operating principle
The basic FET amplifier circuit a



Top