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So i am planning to make this project in which i want to use two transmitters and two receivers.

I want to make one of them to transmit waves that go only for say 3+ feet and another than can only transmit around 1 feet. 4

Is it possible?

I know frequency plays an role and so does the power, but how should i exactly get the distances my wave can travel?

Is there a precise way? If not how i should work it out?

if i get the frequency i can work on the component values of my wave generator.

Please need help fast.

Secondly,

Is there a simple way in which i can know whether the wave i transmitted is being recieved.. i want to know it on the transmitter side.. (maybe getting it back from reciever).. But exactly how? Is there any other method?

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# Varying the distance radio wave travels (Urgent)

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