Establishing and keeping to a standard audio level, especially in studios, has been a problem since the first radio station went on the air. Back in the 1960s, audio console output levels were usually ...

We're almost all pretty good at using our phones to measure stuff, like counting calories, tracking walks, and ensuring our new shelf is level. But you know what we hardly ever think about? The volume ...

Although the SA604A was designed as an RF device intended for the cellular radio market, it has features that permit other design configurations. One of these features is the Received Signal Strength ...

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.