VU Meter circuit with LM3915 has a lot to do with this circuit based on the difference between the ambient sound from the burning of LEDs speech, müzük, television, etc.. VU Meter circuit as compared to non-working microphone sound output of the TDA2822 amp is being upgraded with integrated LM3914 50k potentiometer input is given to the sensitivity can be adjusted. LM3915 and LM3916 LM3914 can be used instead of a printed circuit board “sprint layout” prepared with 10 ultra-bright blue LEDs are used looks just fine ..
Source: http://cxema.at.ua/publ/shumometr/3-1-0-64 alternative link:
FILE DOWNLOAD LINK LIST (in TXT format): LINKS-17477.zip
