I've been trying to research this for the past fews days but I can't seem to find much of an answer. A lot of people out there seem to have used a tip31 transistor circuit to switch a bank of LEDs but I'm not sure this is the best way to do it. I've also looked at VU meters in the terms of an LM3914/5/6 but these (as they are designed to do) switch a line of LEDs depending on sound whereas I want all the LEDs on but their brightness to increase as the sound level increases.
Perhaps I'm looking for to simple an answer to too complicated a question. Is there any way of using the outputs of the likes of an LM3915 to control the brightness as I describe?
Perhaps I'm looking for to simple an answer to too complicated a question. Is there any way of using the outputs of the likes of an LM3915 to control the brightness as I describe?