It used to be a must-have on any hi-fi, a pair of moving coil meters or LED bar graphs, the VU meter. Your 1980s boombox would have had them, for example. VU, for “Volume Units”, is a m… ...

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

While on the subject, check out this nice 7-segment bubble LED digital counter for the 1530. Continue reading “A VU-meter Indicator For A Commodore 1530 Datasette” → ...

Enough preamble. It would be great if we start with the proven circuit of a practical audio peak detector. The circuit provided is a VU meter driver with bipolar peak detection. This clever design ...

Audio metering is present in almost any equipment that plays or records audio – from cell phones displaying bar graphs of audio output levels, to home stereos with flashing LEDS, to live broadcasting.