A VU (Volume Unit) meter is a device used to measure the audio level. Here are the full connections for a typical VU meter:
First, you need to supply power to the VU meter. This usually involves connecting the positive and negative power supply terminals to the appropriate voltage source.
The audio signal to be measured is connected to the input terminals of the VU meter. This could be from an audio amplifier output, a preamplifier, or any other audio source.
There might be additional connections for ground to ensure a stable and noise-free operation.
Some VU meters may have calibration or adjustment potentiometers that need to be connected and set correctly for accurate measurements.
The output of the VU meter, which indicates the measured audio level, can be connected to a display device or used to control other circuits based on the measured volume.
It's important to follow the specific datasheet and instructions provided with the particular VU meter model you are using to ensure proper and accurate connections.
For example, in a home audio setup, the VU meter could be connected between the output of a stereo amplifier and a set of speakers to monitor the audio volume in real-time.