Howto GuidePopular

FM/AM/LW/SW SSB/USB Radio Project with SI4735

Using ESP32s

It’s possible to make digital radios very easily with SI47xx and SI48xx series radio chips, which are widely used in professional broadband digital radios.

I selected the SI4735 (SI4735-D60-GU), which is the full digital chip of the series. Speaking of digital, popular Arduino, STM32 or ESP32 / ESP8266 development boards can be used to control these chips. In this example, I used the ESP32 Wifi card. Although it has wifi feature, I did not use that feature, I only preferred it because it is 32bit and has large memory.

Although these chips normally have SSB feature, but this is not documented and only radio manufacturers (Teksun, Sony, etc.) are given these firmware decoding codes. However, a Russian amateur managed to decode the SSB encoding of the SI4735 chip. I used this SSB patch in my radio project.

I used Si4735 Arduino library published by PU2CLR.

You can follow developments on this Arduino library and SI47xx related projects from this Facebook group: https://www.facebook.com/groups/532613604253401

The Arduino sketch and schematic used can be obtained from the links below.

Required parts:

Other examples:

Si4735 Breakout Boards

If you like the article or topic and it worked for you, you can throw some coins to the following BTC, ETH or ETC addresses to buy a coffee for me 🙂

BTC: 3DDqiuxjr8Z6pKtn6VV6WMMcCTSGsi4Vbr
ETH: 0x1cc0e4cec43fd439ebb94a073709f954bce84ea1
ETC: 0x6e8a1211731fceb78783ce95d634eb5420e4bfa0

Alternatively to keep this blog up and running you may use following affiliate links to buy your needs. Cheers...



Patreon Support!
Tags
Show More

Related Articles

Back to top button
Close

Adblock Detected

Lütfen Add Blocker uygulamanızı bu site için devre dışı bırakın. Rahatsız edici bir reklam uygulamamız yoktur. Please turn the Add Blocker off as you may see there is no annoying ads in the blog.