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need help with debounce circuit

F

Fenris

I'm trying to trigger a Stanton CD player from an Audioarts R60 console, and they do NOT get along well. The Stanton has a combined play/pause button, so it needs a clean pulse about 50 ms long with no bounce.

The Stanton has a remote start jack on the back. It needs either a contact closure, or a 5v DC pulse. The console I/O provides a contact closure on two pins, which goes to the channel ON button, and a +5v DC power supply and return on 2 other pins.

I found this RC debounce circuit:
http://www.ganssle.com/images/debouncerrc.jpg
How do I adapt this circuit? I'm not sure how to find the Vcc supply inside the CD player.

If an RC circuit won't work, I can try a 555 pulse generator.
 
Actually the Vcc is the 5vdc supply on the console. But to get the circuit to play you need to need to connect the two commons (ground) together. I am not sure you would not be introducing a ground loop if you did that. That is why contact closuers are better. You maintain isolation that way.
 
If the Stanton can supply 5v you can use an Opto-isolator (or solid state relay) and not have to tie the grounds together.
 
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