This is an “Audio VU Meter” or “Sound Level Meter”, it is a general-purpose bar-graph Audio...
The post Audio VU/Sound Level Meter with LM339 appeared first on Electronics-Lab.
View more at https://www.electronics-lab.com/audio-vu-sound-level-meter-with-lm339/.
Credit- ELECTRONICS-LAB. Published by Department of EEE, ADBU: tinyurl.com/eee-adbu