SI4735

SI473X Library for Arduino

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Examples

This folder and subfolders have more than 30 examples that might help you to use the Si4735 Arduino Library in your project. Please, be guided by the comments inserted in each sketch.

If you find some error or problem during your implementation, please let me know.

IMPORTANT

This project is about a library to control the SI47XX devices and the focus of this project is the “PU2CLR Si4735 Arduino Library” and its functionalities. Please, don’t ask the author of this project to assist you with displays, encoders, buttons or something else out of the “PU2CLR SI4735 Arduino Library” scope. Thanks.

Use the following groups to guide you in your projects:

IT IS IMPORTANT TO SAY THAT THE CIRCUITS DESIGN BUILT BY THE AUTHOR ARE NOT INTEND TO BE A FINAL PRODUCT. SOME IMPORTANT ASPECTS AND DETAILS ABOUT A GOOD RECEIVER WERE OMITTED HERE. THE IDEA OF THE CIRCUITS MADE BY THE AUTHOR WERE ORIENTED TO BE A PROVE OF CONCEPT OF THE FUNCTIONS IMPLEMENTED IN THE ARDUINO LIBRARY. SO, COMPONENTS LIKE FRONT-ENDS, BAND PASS FILTER, ESD, ANTENNA DESIGN ARE NOT THE MAIN PART OF THIS PROJECT.

Before using this examples, you most install the “PU2CLR SI3735 Arduino Library” on your Arduino IDE. Also be aware about other libraries that are eventually used to control LCD, OLED, TFT display, encoder etc. These libraries are referenced in the sample sketches themselves.

It is important to know tha the author of this library just try to show how you can use this library and the Si4735 device in your appication. Other devices used in some examples like encoders, buttons and display (OLED, LCD or TFT) are not the focus of this subject. Said that, it is possible some implementation using theses devices might need different approaches used here.

The most of the sketches has been developed to run on cross-plataform (ATmega328, Mega2560, DUE, ATmega-32u4, ESP32, ATtiny85 etc). However, in some cases, it was not possible due to hardware limitations in some board. Each sketch has the set of boards you can run it.


The videos below show the Serial Monitor working as a Si473X receiver interface

Si4735 Arduino Library - Arduino Mega 2560 and ESP32 LOLIN32 WEMOS

Si4735 Arduino Library and Bluepill STM32F103


If you have saved the examples in your personal folder, it is important to know the last versions of these examples come with the each new release of the library. Probably, some examples was also fixed or optimized. So, check if you are using the last version of the example too.

The folder extra/schematic can guide you on circuits and components settings.

About the examples folders


Main sketch examples

sketch name description    
SI4735_01_POC.ino Circuit test. Receiver AM (MW and SW) and FM. This sketch uses the Arduino IDE Serial Monitor    
SI4735_03_POC_SSB.ino This receiver implements shows how to use patch and SSB via Arduino IDE Serial Monitor    
SI473X_04_ALL_IN_ONE.ino This sketch uses I2C LiquidCrystal/LCD, buttons and Encoder. It is a receiver FM, AM (MW and SW) and SSB (LSB and USB)    
SI4735_02_ALL_IN_ONE_OLED.ino This sketch uses I2C OLED/I2C, buttons and Encoder. It is a FM, AM (MW and SW) and SSB (LSB and USB)    
SI47XX_01_TFT_ILI9225/SI47XX_01_TFT_ILI9225.ino This sketch uses an Arduino Pro Mini, 3.3V (8MZ) with a SPI TFT from MICROYUM (2” - 176 x 220). It is also a complete radio capable to tune LW, MW, SW on AM and SSB mode and also receive the regular comercial stations.    
SI47XX_02_TFT_TOUCH_SHIELD/SI47XX_02_TFT_TOUCH_SHIELD.ino This sketch uses the mcufriend TFT touch Display Shield. You can use it on Mega2560 and Arduino DUE. It is a receiver FM, AM (MW and SW) and SSB (LSB and USB) SI47XX_01_ATTINY85_LCD_16x2_I2C.ino Test and validation of the SI4735 Arduino Library on ATtiny85. This sketch uses a LCD 16x2 and buttons
SI47XX_02_RDS_TFT_TOUCH_SHIELD/SI47XX_02_RDS_TFT_TOUCH_SHIELD.ino This sketch uses the mcufriend TFT touch Display Shield. You can use it on Mega2560 or DUE. It is a FM/RDS, AM (LW,MW and SW) and SSB example    
SI47XX_11_NO_CRYSTAL The examples found on this folder will show you how to configure the SI473X device with external oscillators (TCXO, Active Crystal, configurable clock generators like SI5351 etc). It can be useful to improve the stability of the system by using more precise oscillators instead of regular passive crystals.    
SI47XX_10_RDS/SI47XX_03_RDS_TFT_ILI9225 FM/RDS AM and SSB receiver. This sketch uses an Arduino Pro Mini, 3.3V (8MZ) with a SPI TFT from MICROYUM (2” - 176 x 220). It is also a complete radio capable to tune LW, MW, SW on AM and SSB mode and also receive the regular comercial stations    
SI47XX_KITS This folder has implementations based on this library that are running in some famous KIT based on SI4735-D60 and SI4732-A10    
SI473X_12_MORSE_CODE_READOUT This example demonstrates a way to report the current status of the receiver via Morse Code.    
iOS and Android Remote Control This example shows a way to use your smartphone as a remote control.    

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