on off a device via computer

dear gurus i wish to make an on/off switch which can be operated via PC
plz let me know how can i do this magic

thanks

Kashif

well, u would need a relay, a transistor, 2 resistors, a led, a doide and some proframming.....
all u need is to conect it to the printer port and send a data to it,
it has 8bit output, so u can make a simple 8 relay board, 8 switches ...
but if u only need one, just make a simle amp for the relay and make sure of the conections.....
that's why i recommend u a little bit mmore complicated switch, so it will be totaly safe for the computer....
about the programming, u could use c, basic, pascal, bisual c, visual basic, etc....
most of them work......

any url

dear fellows can any body point me to some practical link to accomplish the said job

thanks

Kashif Sohail

here's something....
**broken link removed**

and aonther thing......
but note....they are made for more than one relay.but u can use unly one...
https://www.electro-tech-online.com/custompdfs/2002/12/ck1601.pdf