Using PiFM to transmit audio on any frequency up to 250 MHz @Raspberry_Pi #piday #raspberrypi
In this tutorial, Tom Herbison demonstrates how to use a pi as an fm radio transmitter. Please be sure to read through the guide carefully as there are numerous warnings on what not to do during the build:
The first “hack” which allowed experimenters to use the Raspberry Pi’s clock pin (GPIO 4) to transmit audio directly from the Raspberry Pi came from the Imperial College Robotics Society . Their “PiFM” module has since been modified and improved and is now capable of transmitting in 16 Bit Stereo on any frequency from about 1 MHz up to 250 MHz.
It sounds too good to be true…. so I decided to try it out for myself!
WARNING – DO NOT connect your Raspberry Pi’s clock pin (GPIO 4) to any kind of antenna (even a short length of wire) when performing any of these tests!
Stop breadboarding and soldering – start making immediately! Adafruit’s Circuit Playground is jam-packed with LEDs, sensors, buttons, alligator clip pads and more. Build projects with Circuit Playground in a few minutes with the drag-and-drop MakeCode programming site, learn computer science using the CS Discoveries class on code.org, jump into CircuitPython to learn Python and hardware together, TinyGO, or even use the Arduino IDE. Circuit Playground Express is the newest and best Circuit Playground board, with support for CircuitPython, MakeCode, and Arduino. It has a powerful processor, 10 NeoPixels, mini speaker, InfraRed receive and transmit, two buttons, a switch, 14 alligator clip pads, and lots of sensors: capacitive touch, IR proximity, temperature, light, motion and sound. A whole wide world of electronics and coding is waiting for you, and it fits in the palm of your hand.