Led Vu Meter Circuit Diagram. Also we can easily build and cheap. At first mic picks up the sound and converts it into voltages levels linear to the intensity of sound.
At first mic picks up the sound and converts it into voltages levels linear to the intensity of sound. This circuit uses an audio amplifier to generate an analog signal to drive 10 leds depending on the audio signals. The main of this circuit is lm3914n or lm3915.
By using this circuit the level of the signal in the audio device can be displayed like a stereo system the audio level of cd etc.
Although there are several ics on the market with which it is quite simple to construct an led vu meter there is no doubt still interest in building such a meter from discrete components. Read more see the circuit below. We will be happy when using them. The figure below shows a schematic diagram of a audio level or vu meter circuit.
