Understanding RFIDs and Integrating them in your projects
The first time I saw an RFID card, my team and I were representing Ghana at the World Robot Olympiad. We lodged in a beautiful…
Category: Wireless Transmission
Introduction to NRF-24 Radio Transceiver
At some point, most Arduino DIY hobbyist will decide/want to upgrade/interface their projects to be controlled from a distance or communicate wirelessly with other micro-controllers.…
The first version uses an on-board antenna. This allows for a simpler version of the breakout. However, the smaller antenna also means a lower transmission range. With this version, you will be able to communicate over a distance of 100 meters approximately. But automatically, your range indoors especially through walls, will be slightly weakened.
The second version comes with a SMA connector and a duck-antenna but that’s not the real difference. The real difference is that it comes with a special RFX2401C chip which integrates the PA, LNA, and transmit-receive switching circuitry. This range extender chip along with a duck-antenna helps the module achieve a significantly larger transmission range about 1000m(1 km).
The PA stands for Power Amplifier. It merely boosts the power of the signal being transmitted from the nRF24L01+ chip. Whereas, LNA stands for Low-Noise Amplifier. The function of the LNA is to filter the signal transmitted and received for a clear communication.
