You could just invert it using a pnp and a 10k resistor.

Corey

On May 9, 2015, at 9:08 AM, Skyler F <electricity440@gmail.com> wrote:

Is there a way to tell pin 13 on the CM108 sound card to activate High vs Low? 

Although this is off topic, I thought maybe people here would know: 

I want to use a USB sound FOB for APRS with XASTIR, and I want to see if I can use a cheap sound card instead of a TNC. If nothing else, I will have to use a VOX circuit, but it would be cool if I could script XASTIR to tell the USB card to activate high/low when it PTT's. 

If anybody has experience with XASTIR, do you know if you can even use sound cards in it? Or does it have to be a TNC.

73,

Skyler

KDØWHB

--

Skyler Fennell

amsatnet.info

KDØWHB

electricity440@gmail.com

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