How to make computer interface with circuit

Posted by light.hammer on Super User See other posts from Super User or by light.hammer
Published on 2011-01-16T01:26:52Z Indexed on 2011/01/16 1:55 UTC
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Hardware

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scripting

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interface

I understand that I can build a circuit that will do whatever I like (ex: a simple circuit that will turn on a motor to open the blinds or something), and I can write a program that will automate my computer/mac however I like (ex: open this program at this time, or with this input and create a new file, ect).

My question is, how can I interface the two? Is there an easy DIY or cheap commercial (or not cheap but functional) USB plug that will turn on/off from computer commands? I'm basically looking for some sort of on/off switch I can script/applescript. How would you even approach this problem, would I have to write my own driver some where along the way?

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