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Originally Posted by Piotrsko
You do realize that RF is above 1mhz? All your computer stuff is technically short range RF, you just need antennas and receivers.
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No kidding.
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How to Build a Raspberry Pi FM Radio Transmitter
https://circuitdigest.com › microcontroller-projects › raspberry-pi-fm-transmitter
So by writing a code to perform frequency modulation using the spread-spectrum clock signal we can tweak the Pi to work as a FM transmitter. The modulated signal will be given out through the GPIO pin 4 of the Raspberry Pi. We can simply attach a normal wire of 20 cm maximum to this pin to act as an antenna.
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One might be able to 3D print fractal antennae, but my print only does 0.2mm resolution.