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Can any one recommend me an analog to Digital card

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Can any one recommend me an analog to Digital card

Postby snowingfish » Fri Mar 26, 2010 10:42 am

Hello everyone,

I am going to need a A/D card, can anyone recommend me some cards or brands of card. Currently, I just need one channel. Well ignore the features first, I think it can be driver under qnx is important.

Many thanks in advance,

Jason
snowingfish
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Postby Tim » Fri Mar 26, 2010 1:30 pm

Jason,

Does this card have to go into a PCI slot?

The reason I ask is because there are A/D devices that communicate over ethernet (and therefore don't need a driver). The tradeoff is a slower update rate (the device we use can update at >20x a second) since communication is over ethernet and the device being physically located outside the PC.

Tim
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Postby snowingfish » Fri Mar 26, 2010 2:53 pm

Tim wrote:Jason,

Does this card have to go into a PCI slot?

The reason I ask is because there are A/D devices that communicate over ethernet (and therefore don't need a driver). The tradeoff is a slower update rate (the device we use can update at >20x a second) since communication is over ethernet and the device being physically located outside the PC.

Tim



Hi Tim,

USB interface is preferable, located outside the PC is ok. The ethernet port located on the PC is occupied, so I am thinking to use the usb or PCI interface. Any suggestion about these?

Thanks,

Jason
snowingfish
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Posts: 54
Joined: Tue Nov 18, 2008 1:15 pm

Postby Tim » Fri Mar 26, 2010 5:11 pm

Jason,

The device we use (a Labjack UE9 - www.labjack.com) supports ethernet or USB.

The thing about USB is that you'll have to write a USB driver. That may or may not be that difficult depending on your level of USB experience. Also I've found that USB connections tend to be less reliable than ethernet (ie sometimes at system power on the device isn't recognized).

Tim
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