[SOLVED] Relay operate Using Parallel Port of CPU

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nick703

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hello friends i want to operate Relay using parallel port of CPU .

I have a Leone DC12 V Relay , one 1N4007 Diode , one BC547 transistor and 470 ohm Resistor . so is that possible to operate relay using Parallel port . and i have also Lalim Parallel Port EXE . so any circuit is diagram may my help !!!
 

This is a nice portuguese parallel port tutorial
**broken link removed**

Search for Circuito-3

Use google to translate!!!

Or google + parallel port relay circuit

Isolated circuit:

 
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thanks nagkiller . now i want to know is that possible to power up relay 12v take in the CPU parallel port or any other device of CPU becuse no more power supply like S.M.P.S .
 

Parallel port dont have power... you need external power, like above image!!!
 

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