On Sunday 28 April 2002 13:40 L, you wrote:
> Here's one possible solution:
>
> http://www.sealevel.com/catalog/8007.htm
>
> This card will give you 32 relay (solenoid?) drivers. Other cards with
> different I/O specs are available.
>
> Sealevel provides Linux driver modules -- source. It's very easy to
> use. Your program talks to the board (telling it which port to turn
> on/off) by opening a device file (/dev/dio?) and writing to it as if it
> were a flat file using fseek(). You can use python or other scripting
> languages as long as they have the open() write() and fseek() commands
> or their equivalents.
>
> Now you have CONTROL!
> Ed.
>
Ed, and all that replied, thank you. I now have some routes to
follow. I do have one question, this is my own system so I an
going to at least start it out on the cheap. (I need to do some
major sheckle scraping to purchase that card)
I recall having seen control systems using the printer port as
the control port, which in turn talks to transistor drivers and
from there to relays. Does anyone have any ideas on that one
I can build up a lot of boards with transistors and relays on
them for what one of those boards will cost me, later on as the
system needs to be more reliable I will go to the board right now
I would like to build something that is not quite so costly and
though it may not be as trustworthy it will work 90% of the time.
I can visualize the controller part based on such devices as
2n2222's and buffers with the 2n2222's driving small relays.
-- Chuck Hast KP4DJT kp4djt@tampabay.rr.com To paraphrase my flight instructor; "the only dumb question is the one you DID NOT ask resulting in my going out and having to identify your bits and pieces in the midst of torn and twisted metal."
This archive was generated by hypermail 2.1.3 : Fri Aug 01 2014 - 16:33:03 EDT