LED current drive is regulated and programmable, eliminating the need for current limiting resistors. The IC contains an adjustable voltage reference and an accurate ten-step voltage divider.
VU meter uses just one IC and a very few number of external components. It displays the audio level in terms of 10 LEDs.
VU Meter a lm3915
The LM3915 is a device that senses analog input voltage levels (in our case the audio line out) and drives ten LED’s proving a logarithmic 3 dB.
VU meter lm3915
I need more dia gram of vu meter and model of ic
30/10/2011 @ 13:12
i need more circuit please send send it to my email.
and i need a bass booster amplifier circuit . please do it immediately.
thank you ahead.
21/02/2013 @ 09:27
http://www.afiata.com/stereo-preamplifier-with-bass-boost-circuit-diagram-with-ic-tl062/
http://www.afiata.com/hi-fi-dx-bass-circuit-using-bf197/
http://www.afiata.com/bass-power-amp/
18/03/2013 @ 20:39