Operate a relay from a PC port RS232 or Parallel port - Electronic Circuits Projects Diagrams Free

Eddie ESV · 6th June 2004, 04:47 PM

Hi,

Kindly help me with circuit diagrams and programming of how to operate a relay ON/OFF from a PC port.

I am using QBASIC.

Thanks.
Eddie ESV.

Electric Rain · 12th June 2004, 08:11 AM

Well, from what I know it's very simple hardware and software wise. But I know nothing about programming. Here are some pages that should help you out.

http://ourworld.compuserve.com/homep...wden/page6.htm
http://www.hut.fi/Misc/Electronics/c...el_output.html
http://www.epanorama.net/circuits/parallel_output.html

I've seen more too. It's a very popular little thing. Look on google to find more.

There are some pre-assembled boards you can find if you look on google too.

Rain

bogdanfirst · 12th June 2004, 08:43 AM

i have a circuit that can be used for 3 relays via the RS232 port, if this is what you want.
please tell me if you need it, and i will scan it. (sorry for not posting it now, but i have to go).

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6th June 2004, 04:47 PM	(permalink)
Eddie ESV	Operate a relay from a PC port RS232 or Parallel port Hi, Kindly help me with circuit diagrams and programming of how to operate a relay ON/OFF from a PC port. I am using QBASIC. Thanks. Eddie ESV. __________________ Eddie

12th June 2004, 08:11 AM	(permalink)
Electric Rain	Well, from what I know it's very simple hardware and software wise. But I know nothing about programming. Here are some pages that should help you out. http://ourworld.compuserve.com/homep...wden/page6.htm http://www.hut.fi/Misc/Electronics/c...el_output.html http://www.epanorama.net/circuits/parallel_output.html I've seen more too. It's a very popular little thing. Look on google to find more. There are some pre-assembled boards you can find if you look on google too. Rain __________________ When life gives you lemons... make a battery.

12th June 2004, 08:43 AM	(permalink)
bogdanfirst	i have a circuit that can be used for 3 relays via the RS232 port, if this is what you want. please tell me if you need it, and i will scan it. (sorry for not posting it now, but i have to go).