FM Transmitter Hack
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Details
Category: Uncategorized
Created: March 22, 2016
Updated: November 19, 2019
Language: Verilog
Other project properties
Development Status: Stable
Additional info: Design done, FPGA proven, Specification done
WishBone compliant: Yes
WishBone version: n/a
License: GPL
Description
After watching a friend demonstrate how a Raspberry PI GPIO pin could be used to transmit an FM signal for a short distance, I wondered if the same could be done with an FPGA GPIO pin. This project is that attempt. This transmitter is by no means "approved" by the FCC or any other regulating body, so please only use it in a lawful manner. (My hardware transmits a signal that can only be heard within a couple inches of the receiver.)
Current Status
You'll find the core in the rtl/ directory. I finally had the guts to test it this morning (14 June, 2016). It works!!
The only caveat was that I needed to strap together multiple GPIO I/O outputs to the output of this device, and even then it didn't transmit for more than a couple of inches, still ... that was enough to prove that the concept works.
