-3
votes
2answers
93 views

Free space model (wireless communications)

The received power at a given distance = 1km is 1nW . Find the received power at a distance of 5km from the same transmitter , using the Free Space Model. Suppose that frequency is 1800Mhz, ...
-2
votes
2answers
161 views

Ultra low power Micro Wireless Audio Transmitter/Reciever [closed]

I'm am trying to send a signal from a device to a receiver. The signal would need to travel through walls/an enclosed area up to at least 150'. The signal would have to be powered by two AAA ...
0
votes
1answer
320 views

Boosting wifi antenna with aluminum foil: ideal placement/size?

On more than one occasion I have successfully (and significantly) improved the wifi signal a desktop computer was getting simply by taking a flat sheet of aluminum foil and curving it into a ...
1
vote
3answers
153 views

Sending and getting commands through the Internet

I have a little chopper (adult toy to be exact) that can be controlled by the controller within 30 metres. What I have in my mind whether I can send commands to this toy chopper though the Internet, a ...
5
votes
4answers
790 views

Signal triangulation

I want to be able to determine the location of an object that will be moving around in a rectangle about 15" X 10" The location must be accurate to within about 1/4" and be measured at least 100 ...