I want to transmit a square pulse through USB port, is it possible?? if not then what is the best way to do that, preferable is with serial then parallel, and its compatibility with vista,XP,and @))7 windows

hi froends
i want to transmit a square pulse using lab-view, please help how to do that, the preference will be USB,SERIAL, Parallel ports, it it must be compatible with all the os versions, like 2007 windows, vista,XP and other.
please help..................

sanghi wrote:
OK I WANT TO DRIVE A RELAY.
SUGGEST SOMETHING
Calm down!
People can't read your mind. If you want help, repsect those who contribute their time for free to try to help you.
Put yourself in our shoes. If I tell you I want to build a rocket, what information would you give me? You would need to know if it's for a hobby, something bigger, carries a payload, carries living organism, how far does it go, where does it land (if at all), etc...
First of all, we still don't know what you want to do with this relay. Using a computer to generate is series of pulses is not usually the best way. What is the frequency of the pulses that you want to transmit? And why do you want to use a relay? What are you driving? Can the relay that you are using fast enough to follow the pulse train that you'll be sending?
Provide information, ask questions politely and people will help you.

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