This circuit uses two quad op-amps to form an eight LED audio level meter. The op-amp used in this particular circuit is the LM324. It is a popular IC and should be available from many parts stores.

This time I bring an electronic kit for beginners, this is a very cheap and interesting device that displays audio levels ...

A pleasing development for those with an interest in audio equipment from decades past has been the recent resurgence in popularity of vinyl records. Whether you cleave to the view that they possess ...

When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. The unbridled development of radio broadcasting in the 1920s and 1930s demonstrated the need to ...

The circuit was designed to create a volume unit meter that would be used to measure the intensity of audio or sound level. Volume Unit (VU) – an entity equal to a decibel for expressing the magnitude ...

It's the brainchild of Ashdown Engineering, which makes amplifiers for some of the world's biggest musicians. When you purchase through links on our site, we may earn an affiliate commission. Here’s ...

I promised to devote this column to a consideration of how audio metering varies in level as a function of various weighting schemes and the B.S. 1770 algorithm. However, over the past month, I’ve ...

British audio experts Meters Music’s new Cubed speaker system is unashamedly cool, due not just to the minimalist design, but mainly because of the working volume unit (VU) meter built into the body ...

One of the coolest things any sound system can have is some kind of musical visualization. Thumping level meters that pump with the volume are a great example, and were particularly popular in the ...