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I need some expertise! Deals with LED/LCD and transferring/ displaying voltages ! Answered

Here is the situation, I need to send a variable signal from box 1 to a digital LED/LCD display on box 1 and Box 2.
Here is the hitch the signal sent from box 1 has to vary, as well as indicate to Box 2 a different setting (a different measurement scale)
It doesn't actually have to measure anything just be able to send a setting that changes the "measurement setting" on Box 2. 
Hope this isn't too confusing I am looking for ideas/ specifics on parts and places where to buy them.


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10 years ago

Your talking some kind of processor here. I generally recommend http:///www.picaxe.com