Sounds reasonable. I've also had good luck with the ADAM 6000 family,
http://www.bb-elec.com/product_multi_family.asp?MultiFamilyId=12&TrailType=Sub&Trail=39
Plug them into power and Ethernet and you can telnet to them and give
text commands to read A/D pins. Easy to automate from Python just
using sockets. They're obviously less flexible than an Arduino, but
they do come in nice little boxes with screw terminals, static zap
protection on the inputs, blinking lights and all that good stuff for
$200-$400 each.
I think there's a USB version too that does the same protocol over
serial instead of sockets. But Ethernet is pretty nice because you can
put it anywhere, or have more than one.
--
Trevor Blackwell [email protected] 650 776 7870
On Oct 14, 2009, at 10:21 , Sven Hazejager wrote:
Try Phidgets. http://phidgets.com. It's easy to read digital
signals as a HID device. You can get started with not much more than:
Thanks for all the suggestions. I had trouble getting the crude
analog-to-digital (on/off) circuit to work, so I have decided to use
an Arduino Nano (http://www.arduino.cc) that actually has 10-bit
analog inputs. So, I will be doing the pulse counting on the
Arduino, and output interval values through its USB-serial
interface, which I'll read out from Perl or C or something.
This should all work from FreeBSD without any problems!
Sven
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