IR Emitter to Photodiode Help

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hey everyone.

im starting project in need ir emitter talk photodiode. i'm new both of these sensors. ways can test connection between them? basic start code? , ir emitter , ir receiver better combination?

im using arduino uno this.

thanks in advance help. 

a photodiode has frequency range it's detecting within. if photodiode detect light in ir range, can use combination.
an ir receiver includes demodulation filter in cases detect ir signals if modulated 38khz square wave. makes sense in many environments may have daylight influencing results otherwise. ir emitter ir led, use else? please post links parts plan use.


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