I made this led volume meter circuit, and only the first led turns on, and it's very dim. I didn't have 1n4148 diodes, so I used 1n4007 diodes instead (they have similar
4 LED VU meter LM324 under Repository-circuits -25273- : Next.gr
vu meter circuit Page 4 : Meter Counter Circuits :: Next.gr
10 LED VU Meter Project by LM3915 and LM324 - EEWeb
Vu Meter Circuit 40 Led – Electronics Projects Circuits
8 LED VU meter circuit using LM324 IC - Electronics Area
B-Tech Electronic Systems - Prototyped a 12 LED VU Meter for a project, Uses just 3x LM324 Quad Op-amp ICs a few resistors and a decoupling capacitor, it works surprisingly well for
LED vumeter circuit using LM324
8 LED VU meter circuit using LM324 IC - Electronics Area
Vu Meter Circuit 40 Led – Electronics Projects Circuits
Audio Spectrum Analyzer (VU Meter) : 6 Steps - Instructables
Temperature gauge circuit using LM324 IC (PCB) - Electronics Area
http://www.zpag.net/Electroniques/AOP/Vumeter_02.html | Audio amplifier, Electronic circuit design, Circuit design
6 LED VU meter using one transistor (circuit) - Electronics Area
operational amplifier - Op amp LM324 as pre-amp to LM3915 LED VU Meter - Electrical Engineering Stack Exchange
Lm324 vu-meter! - YouTube
LED VU Meter using LM3914 and LM358
1.5V battery tester circuit using LM324 - ElecCircuit.com
ITB ( Institut Teknologi Bandung): Audio VU Meter 10 LED by LM324
Audio VU Meter
How to make Audio Level VU Meter using LM324 ic - YouTube
