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I recently bought these:
https://www.sparkfun.com/products/10535
RF Link Transmitter - 315MHz
https://www.sparkfun.com/products/10533
RF Link Receiver - 4800bps (315MHz)

All I want to do is:
Light up an LED on another breadboard.
On one side I have Arduino>RF Transmitter.....RF Receiver< LED

Is this possible?
Just send a digital high to the input of the transmitter and connect the output of the receiver to an LED and it will work?
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I don't think you connected the grounds, Dave.
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Quote
Just send a digital high to the input of the transmitter and connect the output of the receiver to an LED and it will work?
I doubt the output will source or sink enough current to light a LED.
Also, expect interference from neighbours remotes, doorbells, garage door openers...
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I imagine an Arduino is somewhere in the mix too, right? You need to download the Virtualwire library.
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You need at a minimum 2 arduinos, one transmitting and 1 receiving using virtualwire, or you can use some specialised hardware designed for doing this.
A pair of SC2262 / SC2272 encoder decoder chips will do all the hard work.
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