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Simple RF Transmitter and Receiver for PIR module thing

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Hi, i've got a small PIR module with 3 leads:- Output, V+ and Gnd
Its output is a logic output, it goes high when it senses movement or IR or something.
Does anyone have any ideas of how to make a simple transmitter and receiver that can... well transmit a signal from a logic signal and receive it and convert it back into logic?
Operating voltage of module is 4.7 - 12Vdc

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