AM TX & RX. Help me plz .... Urgent!

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gsa_alsaher

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am tx and rx

Hi ,,
I need your help in my project.
I want to design AM transmitter and receiver that send a DC volt (there is no information). I just want to receive a DC volt that will be an input of PIC16F84. The range required is 20 meter. How can I control the range?.

Can any one help me, plz?

Thanks.
 

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