I'm working on a project that requires me to build an antenna and I'm not very experienced with wireless transmission. Here is an overview of my project: Four parking spots for cars with pressure plates that produce roughly 4 or 5 volts when a car is parked in a spot. (this is small scale - think model car size) Since the 4 volts indicate that a car is parked, we want to send that signal to the entrance of the parking lot that lights up an LED indicating the spot is taken. The distance between each spot and the entrance would be roughly 3 feet max. There would be a LED for each spot
We were thinking of using an oscillator to convert the voltage to a signal that can be transmitted through an antenna. Something like this: https://www.sparkfun.com/products/9089 I did more research and found this chip that supposedly converts voltage to frequency and frequency to voltage which would be perfect for this project (again, I'm not experienced with wireless transmission - this could be wishful thinking) We wanted to use a microchip antenna so we can solder on a PCB. Here's an antenna example: https://www.sparkfun.com/products/144 So would we need a receiving antenna with the same Hz as the transmitting antenna? I'm assuming I could solder the receiving antenna to the frequency input, or is that completely wrong? I assume we would need a different frequency for each parking spot sensor so the corresponding LED would light up. Does that sound correct?
My main questions if you guys can't answer the few in the paragraph before is this:
What antenna (or antennas if I need multiple ones) would I look for to transmit the converted voltage/frequency
Would I need extra parts to help transmit the frequency and receive it?
Thank you for your patience and your expertise, every bit of knowledge helps and I appreciate any input. Thank you!