So how it is made..

A project log for An exotic FM transceiver using Si4720

Incredible integration of Si4720 enables very simple and stable FM transceiver by single chip!

kodera2tkodera2t 04/18/2018 at 00:040 Comments

Here is the whole schematic. Actually nothing to hide. Si4720 receives I2C commend from ATmega328P with Arduino bootloader and also tiny OLED (64x32 pixels) is connected through I2C bus. One rotary encoder is added for the purpose of frequency control.

Actual operation can be found in the following movie...