The RFzero™ board is an Arduino compatible GPS based Si5351A RF signal source. The typical use of the RFzero™ is as a beacon (IBP, SPB, CW, FT8, JT9, PI4 and WSPR), signal generator, VFO, Qatari Oscar 100 dual LO or a low cost 10 MHz GPSDO. A dozen of programs (sketches) are integrated into the Arduino IDE for easy upload to the RFzero™ so you don’t need to write the software yourself.
The RFzero can generate frequencies from 2605 Hz and beyond 200 MHz. At the same time 28 I/O pins are available and eight of those are via an ULN2803A power driver. The programming and configuration is done via the USB port.
The RFzero has been developed for radio amateurs, RF enthusiasts and everyone else who wants to extend the Arduino skills in combination with RF. The RFzero™ board is largely compatible with the Arduino Zero and Arduino M0 boards, however, it has been carefully designed for flexible use in RF applications and with attention to the frequency spectrum and stability performance.
The RFzero functional block schematic.
Using the RFzero you can learn how to program an RF device and other electronic circuits or you can learn about RF circuits if you are already skilled in software development. The setup is very flexible, you can roll your own programs from scratch or you can use the RFzero™ library and example programs together with the Arduino Integrated Development Environment (IDE).
The RFzero key features are
Download a RFzero presentation here.
The RFzero has been designed with spectral performance in mind while using the cost effective Si5351A digital clock generator. However, if spectral performance is critical, e.g. for a 10 W or higher power beacon, transmitter or VFO, the Next Generation Beacons platform is the right choice but it is also in a different price range. Therefore you should see RFzero as a low cost and fair performance RF device.
The RFzero also has a user group at Groups.io.
If you want to add even more peripheral devices sites like eBay has a large selection to chose from. Please feel free to getinspired from the Shop.