Note that a Schottky diode is not critical in this crude circuit, a standard silicon diode such as the 1N4007 can be used as a substitute. Nowadays we can see mass-produced analog VU meters with ...

[mircemk] explains all the circuitry required to drive the tubes, and how to hook them up to create a two-channel stereo VU meter. The final circuit largely relies on a transistor, a diode ...

It’s a volume units meter for his sound ... using an AN6884 LED driver chip. It has an integrated amplifier circuit which makes it the perfect part for building a VU display.

Their rather horrible 100 µA edgewise movements had VU-type scales, the drive electronics ... log-scaled VU-ish meter, something snappier would be good: time for the second pass. Figure 2 This ...