DIY SW , MW , SDR Radio with ESP32 and Si5351
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- Опубліковано 30 вер 2024
- This radio receiver is capable of receiving all MW and SW bandwidth, and can also operate as an SDR receiver, so with the help of PC and appropriate software we can decode many different types of signals.
It consists of several parts:
At the input we start with a potentiometer of 1 k ohm, it is the RF attenuator. The next circuit is the preselector, switchable to the MW and SW ranges. Tuning of the preselector is done with a potentiometer. The tuning voltage is stabilized by 4 LEDs but of course you can also use a 6.8 V or 8.2 V zener diode. The two transistor RF amplifier increases the sensitivity and prevents also that Local Oscillator signals from the mixer are leaking to the antenna input. This would cause a lot of hum. The mixer is a well known NE612 (or NE602, SA602, SA612).
And now a little more detail about the local oscillator. This VFO was actually the reason why I decided to build this receiver. It is based on Genius idea of T.Uebo / JF3HZB to create virtual Analog rotating dial on Colour TFT screen. For the preparation of this section is used an ESP32 microcontroller, Si5351A I2C Signal Generator module board and 1.8 inch 128x160 TFT LCD with ST7735 chip. A rotary encoder is used to change the frequency. You can download the code below or directly from autr page : tj-lab.org/201.... The code can be easily modified so that we can change scale and background colors, scale shape , the direction of rotation and rotating speed. Also can be changed Offset and Carrier frequencies as well as minimum frequeny changing step and other parameters. On the picture below you can see some visual modifications to the dial scale.
The code modifications I made in this case are:
char f_rev = 1; //rotation direction change
-vth=0.2 // Acceleration
-Racc=0.02 // and
-Rdec=0.2 // speed change to faster
The next step is the IF amplifier and decoder. I tried several types, with integrated circuits TCA440, TDA1072 , but I was challenged to do this part in the good old way with IF transformers. You really need a lot of patience to set it up, but the result is great. Now the signal is carried to a pre-amplifier based on the 741 IC and finally an class D amplifier board with PAM8403 from Aliexpress.
And lastly to emphasize that the sensitivity and selectivity of this receiver are excellent, given that I am in a densely populated part of town and the antenna used (The PA0RDT Mini Whip) is only 3 m above the ground.
Complete instructions, schematics , code and 3D parts at:
www.hackster.i...
If you are interested in this area, look at the Playlist with all my DIY Radios at:
• All My DIY Radio Recei...
Visit my UA-cam Channel for more Projects , DIY and How To Make videos:
/ mirkopavleskimk
by mircemk
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Excellent job! The analog looking dial is a great idea and beautifully implented. The whole retro look is very well done. The quality and originality of this project is second to none.
Congratulations on an excellent design! The old style tuning dial graphics are extremely well done.
Subscribed!
Very nice neat job, the dial movement gives the radio it's soul back 👌🏼👍🏼
At 2:50, the announcer talks about the football match in Turkish.
Well done and great project. The tuning display is just beautiful and love the analogue look & feel of the project.
GREAT. I rarely login to UA-cam just to give a thumbs up or even comment on something. But here I have to make an exception. Many thanks for showing us this beautiful master piece. Hardware, software, design, everything fits perfectly.
Даже болгарию ловит
😊
I am amazed by the curved scale simulation. Amazing coding.
Hello, very informative project. Is it possible to modify it to listen up to 30mhz AM?
Thank you in advance
Beautiful work 👏
Thanks
As a Radio Ham (G6XIB) I really love this! I particularly like the tuning knob and old style display. I'm not very experienced in building but may well try this one. Thanks so much for sharing this. Will you be building a transmitter to go with this?
73s from G6XIB
Very nice work . I love self-made radios .
Man, you're a genius!
Lovely design. At about 3 minutes in, you are tuning in to what appear to be two SW broadcast stations in what should be the 30m amateur radio band. There are no SW broadcasters in that band. Have you got the frequency display calibrated properly?
You are right. The real frequency is that on the screen plus 455 KHz. I later corrected that in the code of SI5351 VFO.
FANTASTIC!!!
Thanks
Nice job and I love the display.
I'm surprised you didn't include SSB.
Hey can you make one for me. Thnx de vu3mes.
Sorry , no
Fantastic analog dial - neat that it switches from curved to straight but I didn't see how you made it change.
Only one line in the code needs to be modified for a change, and can also be done with a key, with a slightly larger code intervention
Very good.
Excellent 👏👏👏
Very Cool! - You should try to get some company to source all of the parts and sell this kit.
Thanks
where I can find more details about of IF transformers ?
thank you!
I'm sorry but I don't know the exact features either. According to the source I got the schematic, the first is yellow, the second is white, and the third is yellow again.
A super project, congratulations!
2:53 Göztepe football match
5:39 Mustafa Sandal
:)
Can it decode SSB without a PC, and is this project open source?
It can not decode SSB without PC, and project is free
👍ok
Amazing!
Transmitter sw 2wat
FANTASTIC !!!!
Wow! This is a great project. Very well done. 73 dr op.
Perfect work . thanks for your hard work .👍👍👍🇧🇩
Класс!!!
Oh wow!! Superb work!!!
Thanks
Oh!, magnifico proyecto, felicitaciones, gran trabajo, saludos desde Argentina!, gracias.
thank you for your sharing
Follow the webpage you linked to build this radio. I have a question, please help me answer:
When using SDR mode, how to connect the 5th interface of NE612 to PC, and how to connect the cable.
Can you give me your email
Thanks for your reply
In SDR mode pin 5 from NE612 is disconnected from IF trafo and connected to one channel of PC soundcard, and ground to ground of soundcard
This is excellent, the dial interface is really clear !
If I can only buy this beauty!!! A real master piece.
The radio sounds terrible, everything seems distorted and noisy and the radio stations on 10MHz do not even exist - something must be wrong on the front-end or mixer or demodulator or all together?
But I love the analog scale implementation, that is very well done 👍 you might implement the new SI4735, that gets the job done.
station is on 10MHz - 455KHz (IF) , later this is resolved in the code
very nice project, but two questions:
- what it is I-st IF (455kHz, 10.7 ...)
- and how you made it SDR connection (output) I see is CAT controlled
TNX
First IF is 455kHz. SDR out is pin5 of Ne602.
next time use rtl chip and add ssb
Спасибо за очень интересное видео!
Excellent work - the tuning display is very clever
Very nice design, especially the display
Bro do you have any email i need talk to you please?
Just Great!! It would be perfect if can control varicap voltage from microcontroller :)
Thanks
Wow. How about sharing some of that code and maybe jotting down the schematic on a napkin next time you sit for a cup of tea, and putting that up too. Great build.
Instructions , schematic and code at: www.hackster.io/mircemk/diy-sw-mw-sdr-radio-with-esp32-and-si5351-b580de
This is a great project and a great video!
awesome
Thanks
Stupendo !! 😍 Greetings from Italy
Thanks
Excellent
Are you selling these?
Sory, No
@@MirkoPavleskiMK ,and that's what makes it special and uniquely yours! Cheers Mate!😁
Awesome build...congrats...
Thanks
Nice job and great work!!!!
Si5351 output is sine or square wave?
Square wave
Super
Amazing 🤩🤩🤩
One more awesome Mirko project :)
Were do you get your BB212 and your coils ?
MW coil and IF transformers from old MW pocket radio , and BB212 from Aliexpress
Thank you Mirko. I could not manage to find BB212 on Aliexpress, but 2 BB112 seems to be mostly equivalent :)
nice work!
This is so cool ..
Hi you have build superb Radio. If i want to purchase form you then what should I do?
Sorry but not for sale. I would help if you want to make it
@@MirkoPavleskiMK I would like a schematic please de AA9GG
@@grampysmagic3327 www.hackster.io/mircemk/diy-sw-mw-sdr-radio-with-esp32-and-si5351-b580de
ESP32 is a wifi device that uses the same type of MCU that an arduino uses. You could have just used an arduino micro or nano and got the same if not better results unless you have a specific need for wifi integration in the radio set.
Beautiful work! If you want another challenge, maybe build a radio with FM, AM, SW and LW + Internet radio connected to Tunein? :-)
Занимљиво 😊. Волим ретро ствари. Да ли би могао да направиш радио станицу. Била би корисна у ова луда времена кад незнаш да ли ће интернет и мобилни да раде ? 😃
И наравно подршка. 👍
Zasada nemam u planu posto mi je ovaj projekat uzeo suvise vremena , ali mozda u buducnosti. U svakom slucaju hvala na poddrsci
Congrats Mirko, your radio is really nice! And you're right, the display is a key piece, it gives a perfectly clear indication, seems to be very handy to use. Reception seems great. I didn't understand very well how did you made your antenna tuner. Thank you for this video, I found it fascinating!
Thanks a lot
Very, Very NICE!!!!!!!!!!!!!!!!
Thanks
Lepo.