DIY Analog VU meter with Arduino peak meter

This project is sponsored by PCBWAY https://www.pcbway.com/?from=MirkoP
https://www.pcbway.com/activity/anniv...
An analog VU meter, or Volume Unit meter, is a device used in audio equipment to display the level of audio signal in decibels (dB). This time I will present you a way to make such an instrument yourself, which according to the characteristics does not lag behind commercial devices of this type.
The device is relatively simple to build and consists of several parts:
Two microamp meters taken from an old faulty tape recorder,
an operational amplifier ICs (I used TL081, but another similar one can be used),
some passive elements (capacitors, resistors and diode)
and a potentiometer that changes the input sensitivity, and serves to calibrating the VU meter.
I also added a peak meter circuit with Arduino, whose function is each time when the signal exceeds the specified level, turns on RED led.

Detailed instructions, schematic, and code at:
https://www.hackster.io/mircemk/diy-a...

Chapters:
0:06 Short Demo
1:40 Description
4:18 Inside
6:18 Demonstration
9:22 Building

If you like my job buy me a coffee: https://ko-fi.com/mircemk

If you are interested in this area, look at the Playlist with all my DIY projects at:
   • Audio Devices  

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   / mirkopavleskimk  

by mircemk
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#DIYaudio #VUmeter #electronics #arduino #pcbway