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AN6884 - VU Led Level meter for amplifiers
AN6884 - VU Led Level meter for amplifiers circuit The basic component is the complete AN6884 by Panasonic. The AN6884 is a monolithic integrated circuit driving 5- LED and is capable of logarithmic (dB) bar graph display for input signal. Incorporating high gain rectification amp. Enable to apply AC (VU meter, etc.) / DC (signal meter, etc.) Level meter widely. The system operates...
If the circuit is powered off, the battery should be disconnected from it's output otherwise the circuit will drain the battery slowly.
T1 is a transformer with a primary voltage appropriate to your location (120V, 220V, etc.) and a secondary around 2 X 12V 5A.