In SX Microcontrollers, SX/B Compiler and SX-Key Tool, DigitalDj wrote:

Hello Guys,
I am wanting to detect no sound on a computers sound card when no music is playing so i can trigger a pin on the SX28 or 48. By doing this i can tell the SX what i want it to do at that point. I am wanting to control lighted buttons as a attraction method for my jukebox.

 

So what i need is a circuit that can detect the absence of the signal and trigger the pin high or low. The SX would have to be programmed with a delay once the pin is triggered so it doesn't get triggered by just a simple break in the music. I didn't want to have to do this by software because i want sequences programmed in the SX and not be controlled by the computer.

 

Thanks for any ideas!

Kevin

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