Si5351 Frequency Synthesizer/Signal Generator

This arduino application uses Adafruit Si5351 breakout board to generate frequencies from 8 Khz - 160 Mhz

Hardware required:

1. Arduino Nano (or any arduino)
2. Adafruit si5351 breakout board (or any other available)
3. 128 x 64 OLED
4. Rotary encoder

Hardware connections:

ENCODER -- ARDUINO: s1 -- pin d4 s2 -- pin d5 key -- pin d3 vcc -- +5v

OLED -- ARDUINO: vcc -- +5v scl -- a5 sda -- a4

S15351 -- ARDUINO: vin -- +5v scl -- a5 sda -- a4

Other libraries used:

1. Arduino rotary library
2. Adafruit_SSD1306
3. Adafruit_GFX
4. Wire
5. Si5351 - https://github.com/pavelmc/Si5351mcu.git

How to use the app:

There are only two inputs to arduino:

1. Rotary encoder
2. Push button in rotary encoder

Rotate : To move to the next option or increase(clockwise) / decrease(counter clockwise) frequency. Push button : To modify current selection

Unit/Step size : Hz/KHz/MHz/Off

Note: At a time only one of Ch1/Ch2 can be active