On Tue, Aug 01, 2000 at 01:40:09PM +0200, Peter T. Drechsler wrote:
> Hi.
>
> Can anyone recommend me a decent AD-Card that runs under RTLinux.
> Kernel is 2.0.33 with appropriate RT-Patch. Runs.
> Could be PCI ot At.
> Should have at least 8 analog inputs with gains (12 Bit is ok).
> Should have 2 or more analog outputs, preferable 0-10V.
Look at Comedi. http://stm.lbl.gov/comedi. Lots of boards
supported.
> I want read out thermoelements type K. Since the voltages are micro-V
> I need gains in the order of 10, 100, 1000.
Are you sure that you need real-time? Thermocouple leads make great
antennas, and because of this are usually heavily filtered, sometimes
using a 1 Hz low pass filter. The latency in the filter usually
is greater than the latency of Linux. (This may be irrelevant if
you have another need for real-time.)
Also, it is usually recommended to use external amplification and
filtering for thermocouple inputs. (And from personal experience:
if possible, find a circuit that can detect disconnected
thermocouples...)
dave...
-- [rtl] ---
To unsubscribe:
echo "unsubscribe rtl" | mail [EMAIL PROTECTED] OR
echo "unsubscribe rtl <Your_email>" | mail [EMAIL PROTECTED]
---
For more information on Real-Time Linux see:
http://www.rtlinux.org/rtlinux/
