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Author Topic: IC mode selector? backlight dimmer?  (Read 989 times)

AcidFire

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IC mode selector? backlight dimmer?
« on: April 24, 2004, 04:24:39 PM »

Hey, i need a bit of help looking for an IC and i'm hoping one of the electronic gurus can help me out here. What i need is something that allows me to switch between different circuits from the same inputs
Inputs
. |      
. |
[   ] Switch w/ IC
. |
/ | \
| | |
Different VU meter circuits

 not sure if that made any sense so i'll describe it.
Basically, it takes the three surround inputs from a standard audio card to make a vu meter. However, the guy im building it for would like it to br switchable between three modes(much like most surround speaker controls)
Stereo
4.1
5.1

does anyone have any suggestions? does it make any sense?

Also, the lcd im putting in his system has an led backlight, which he would like to act like this:
Room is bright ----> Led backlight is dim/off
Room is dark  -----> Led backlight is brightest setting.
again, any suggestions would be apperciated!
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Whatever it is, mod the hell out of it!

john_is_war

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IC mode selector? backlight dimmer?
« Reply #1 on: April 24, 2004, 07:29:15 PM »

use a DPDT switch and a relay.

switch
| | . . . . | |
| | . . . . | |_____5.1
| |_____|
| . . . . . |
4.1. . . . |
. . . . . . relay which triggers a relay (when the relay is on, the stereo is off)

as for the LCDs (I haven't with them, so I'm not sure of capabilities), but if you can control the backlight LCD through a voltage change somehow, you can utilize an optical sensor to control that.
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