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I wish to develop a software, using which i can control electronic devices.
Simply wish turn on and off a light.

I know its not easy task to do. But i am ready to learn and study about new things.

The first thing , i want to know which device or intermediate thing i should use to connect to external device(eg. Bulb).
From where should i start.. Pleas help me..
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Start reading here: I/O Ports Uncensored - 1 - Controlling LEDs (Light Emiting Diodes) with Parallel Port[^] - it should give you a rundown on pretty much everything you need.
 
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