Wire up to your favorite microcontroller (we suggest an Arduino) to the I2C data lines to set the transmit frequency and play line-level audio into the stereo headphone jack. Boom! Now you are the media. Listen using any FM receiver such as your car or pocket radio receiver – this is an easy way to transmit audio up to about 10 meters / 30 feet away.
This transmitter even has RDS/RDBS support – that’s text/data transmissions that many modern FM receivers support. (It’s how some car radios can display the FM station and current song playing). You can transmit just about any text you want, set the station identifier as well as the ‘freeform’ buffer.
Best of all, you’ll be up and running in minutes with our awesome Arduino library, example code and tutorial!
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.
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This is great to see.
The NS73M IC has been discontinued and are no longer available from SparkFun, so it’s good to see a replacement – actually this one is actually a better IC, as it allows you to send the RDS info.
BTW – the ‘datasheet’ link at the product page has an ‘https’ and an ‘http’.