20 Apr
2001
20 Apr
'01
10:33 p.m.
I need to test a device that uses sensors that send back a signal using a
0-20MA current. anyone know of a source of a schematic to make something to
generate such in 1 ma increnemts? or have any tips???
20 Apr
20 Apr
11:03 p.m.
I need to test a device that uses sensors that send
back a signal using a
0-20MA current. anyone know of a source of a schematic to make something to
generate such in 1 ma increnemts? or have any tips???
How about a battery, a potentiometer, and a meter?
If you want something automated and fancy, many DACs are actually current
output devices that require current to voltage converters, just buffer and
use the current output. Try this, took just a couple weeks for mine to
arrive.
<http://www.dataq.com/edn>
Fill out a short form, business addresses only, and they ship you a free
serial port based I/O module, looks like both analog and digital stuff plus
their windows based software package. Looks like fun to me.
23 Apr
23 Apr
2:03 p.m.
Schematics included with the Atari 850 serial interface might interest
you. This interface does RS232, and both 20ma and 60ma current loop for
tty interfacing. Interested? I'll scan em'. You might find the same on
the web though, if you look for Atari 850. You'd be looking for details
of port #s 3 and 4 of the four available on the 850 interface.
Regards,
Jeff
In <5.0.2.1.2.20010421003144.02e66070(a)mail.zipcon.net>et>, on 04/23/01
at 07:03 PM, Geoff Reed <geoffr(a)zipcon.net> said:
I need to test a device that uses sensors that send
back a signal using a
0-20MA current. anyone know of a source of a schematic to make something
to generate such in 1 ma increnemts? or have any tips???
--
-----------------------------------------------------------
Jeffrey S. Worley
President
Complete Computer Services, Inc.
30 Greenwood Rd.
Asheville, NC 28803
828-277-5959
Visit our website at HTTP://www.Real-Techs.com
THETechnoid(a)home.com
-----------------------------------------------------------
2:28 p.m.
Atari 850 tech data, you got it:
http://www.atari-history.com/atari850.html
Curt
THETechnoid(a)home.com wrote:
Schematics included with the Atari 850 serial
interface might interest
you. This interface does RS232, and both 20ma and 60ma current loop for
tty interfacing. Interested? I'll scan em'. You might find the same on
the web though, if you look for Atari 850. You'd be looking for details
of port #s 3 and 4 of the four available on the 850 interface.
Regards,
Jeff
In <5.0.2.1.2.20010421003144.02e66070(a)mail.zipcon.net>et>, on 04/23/01
at 07:03 PM, Geoff Reed <geoffr(a)zipcon.net> said:
I need to test a device that uses sensors that
send back a signal using a
0-20MA current. anyone know of a source of a schematic to make something
to generate such in 1 ma increnemts? or have any tips???
--
-----------------------------------------------------------
Jeffrey S. Worley
President
Complete Computer Services, Inc.
30 Greenwood Rd.
Asheville, NC 28803
828-277-5959
Visit our website at HTTP://www.Real-Techs.com
THETechnoid(a)home.com
-----------------------------------------------------------
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