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

[gsa_alsaher]

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.

 

[Crazy_Engineer]

The range will depend on the module you use...and how much power you are putting in the Tx side..... if you need circuits you can check the following links...
Transmitters :: Electronic Circuits/Schematics Directory :: Next.gr

**broken link removed**

Hope the links help you...