- MAX2871 23.5 - 6000 MHz Fractional/Integer-N Synthesizer/VCO
- -35 to +15 dBm output power (-25 to +10 across entire frequency range)
- Output control within 0.5 dB, with closed loop feedback
- GUI allowing easy control, including sweep capabilities
- Adafruit Feather form factor
- Firmware works with my STM32F103 Feather
- Display not updating if time between frequency steps in sweep is too long (greater than UART timeout)
- Map keyboard to frequency and power adjustment in GUI
- CLI and GUI modes based on sys.argv NOTE CLI works but is very finiky wrt command order and updating
- Fractional vs Int N selection
- Calibrate output power
- Rewrite with RTOS to ensure a more responsive user experience
- Add ability to select Frac / Int N PLL settings
- Dimmable LEDs
- Many pin locations incorrect (SPI pins off by one...)
- LED's back to front, and connected to GND instead of VCC
- Feather footprint internal pin numbers incorrect