So it is no surprise that hams like [jmharvey] will build an antenna analyzer from a DDS ... There is another version of the Arduino code that drives an OLED screen, although you still need ...

Stock, this radio module is just okay, but with a few modifications, it can be turned into a very good receiver with a spectrum analyzer and ... and by adding a simple Arduino, the complete ...

Arduino is little open source circuit board ... The latest addition to the project is LiquidWare’s TouchShield, an sensitive OLED that sits on top of the main board. Here it interacts with ...