Re: RS-232 control of several relays
- From: MooseFET <kensmith@xxxxxxxxx>
- Date: Mon, 02 Jul 2007 18:37:51 -0700
On Jul 2, 4:30 pm, "Steven Endres"
<stevenend...@xxxxxxxxxxxxxxxxxxxxxx> wrote:
I want to use an RS-232 port to control several (at least 8, but preferably
16) relays individually. The load on the relays is low voltage/low current.
Basically, I want to use RS-232 to close the relay to replace a PC power
switch, so I can boot a machine on demand from another.
This is a school project, so I'm looking for a low-cost solution. I'd prefer
a trip to Radio Shack instead of a commercial solution. I did find this
component, which looks suitable:http://www.elabinc.com/ede300.htm
Any suggestions? Am I on the right track?
Are you intending to build something?
Why not use the parallel port?
Do the relays take turns or can they be on in any combination?
Are you able to write software?
Can you program a PAL (22V10) or a PIC?
The RS232 has a couple of handshake lines and the RS-232 line. There
are several things you can do to make the hardware simple at the cost
of making the software more complex.
If you think of the lines as just signals you can make go high and low
and pulse and not as RS-232 data, I think you'll see some of the ideas
right away.
8 relays won't be very cheap BTW.
.
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- From: Steven Endres
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