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Operate a relay from a PC port RS232 or Parallel port

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Eddie ESV

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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.
 
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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