This is an incredibly compact FM transmitter module, the NS73M. It's designed as a key component for wireless microphones and MP3 broadcasters. With just two external components needed and a fully digital interface, it's highly convenient. Note that this module is for research purposes and isn't FCC - certified on its own (certification requires an attached antenna), but it has been used and certified in numerous consumer products. A breakout board is also available. Its features include a frequency range from 87.5MHz to 108MHz, stereo multiplexing modulation, a simple external 32.768kHz component, small size, no need for alignment, support for SPI and I2C interfaces, an operating voltage of 2.7V to 3.6V, and an operating temperature range from - 20°C to 75°C. It measures 7x7x1.5mm. Relevant documents such as a description, datasheet, 3 - wire control example, and example code in Basic are available.
Using the NS73M FM Radio Transmitter Module is easy. First, make sure to connect the two required external components. Then, set the operating voltage between 2.7V and 3.6V. You can adjust the frequency within the 87.5MHz to 108MHz range according to your needs. When using it, remember that this module is for research purposes and isn't FCC - certified by itself. You'll need to attach an antenna for certification. For maintenance, keep it in an environment with a temperature between - 20°C and 75°C. If you encounter any problems, refer to the provided documents like the datasheet and example code.
