Internet radio and audio file player on ESP32-S3

My colleague @grzes_dst mobilised me and I added a connector for the keyboard on the PCB

Here is the version with one encoder, but with two encoders it is the same





The board is wider than the old version - it is worth taking this into account when making the case.
I will publish the gerbers in the near future.

Greetings ....

DJCheester . thank you very much for another version of the PCB and for the instructions on swapping libraries. Great job.
When making new versions of the PCB, would it be possible to update the leads under the PAM8403 amplifier (I mean the output pads). I have marked the offset in the picture.

And why don't you connect it in the way recommended by the manufacturer? Output filters with inductances are a must.

ArturAVS wrote:

And why don't you connect it as recommended by the manufacturer? Output filters with inductances are necessary.

Look at the documentation Link

@ArtXs Read carefully. Page 9. The minimum is two ferrite "pearls". Second point, this is not a HiFi amplifier.

ArturAVS wrote:

Read carefully. Page 9. The minimum is two ferrite "pearls"

Well, that's what you should read. This is the minimum for those wanting to reduce EMI above 1MHz, but the basic application from page 1 omits this, as the standard 'filtering' is the speaker inductance. At most one can interpret, each in their own way, whether this lowering of EMI is necessary, but this documentation does not settle that.

Added after 16 [minutes]:

Or perhaps as an alternative, a module like this:
https://github.com/WeActStudio/WeActStudio.I2SSpeakerModuleV1/tree/master
https://datasheet.es/download.php?file=NS4158
It was complained in the thread that a potentiometer is needed for the PAM8403, with the ns41xx there is no such problem.

ArtXs wrote:

would it be possible to update the leads under the PAM8403 amplifier (I mean the output pads). I have marked the offset in the photo.

And here is the problem because ch production is Chinese makes different ones a little narrower and unfortunately bigger. I just happen to have the ones that fit my PCB perfectly.

ArturAVS wrote:

Read carefully. Page 9. The minimum is two ferrite "pearls". Second point, this is not a HiFi amplifier.

That it's not HiFi I know, and the kitchen radio I have on this PCB is not HiFi either, it's not that league of equipment. It is supposed to be a cheap internet receiver and that was my assumption while designing the PCB. In addition, I completely abandoned SMD components because my eyesight is no longer that good.

I2S module is taken into account in the next version if kol Robgold goes in this direction.

https://pl.aliexpress.com/item/1005009587262392.html

For the currently installed PAM8403 amplifier there are potentiometers added on the PCB for setting the input signal threshold.

Greetings....

Added after 6 [minutes]:

Just wondering about replacing the IR receiver that is currently on the PCB with a JST 3-pin connector for plugging in the receiver on the wire.

Greetings....

Added after 1 [hour] 24 [minutes]:

simw wrote:

As an alternative, maybe a module like this:
https://github.com/WeActStudio/WeActStudio.I2SSpeakerModuleV1/tree/master
https://datasheet.es/download.php?file=NS4158

I don't know if it's so good because the amplifiers are integrated, but ordinary amplifiers with analogue input are the ones I gave above, admittedly mono so you need two pieces, but they have inputs with I2S which theoretically should eliminate any interference.

Greetings ...

DJCheester wrote:

I am just thinking about replacing the IR receiver that is currently on the PCB with a JST 3-pin connector for plugging in the receiver on a wire.

@DJCheester I think it would be a good solution to have the IR on the JST 3 connector.
Anyway, you can leave it as it is and you can use the JST 4 connector by removing one pin and it should fit , to bring the signal to the IR receiver further away from the board.

grzes_dst wrote:

JST 4 sockets by removing one pin and it should fit , to lead the signal to the IR receiver further away from the board.

I now do this

DJCheester wrote:

And here is the problem because ch production is chinese makes different ones a little narrower and unfortunately bigger. I have just the ones that fit my PCB perfectly.

I see, and could you please post the exact pictures or possibly a source for the matching PAM8403 module.

Sorry to jump in with something completely off topic, but I'm looking for someone who has tried working with this adc pcm1802 module in conjunction with an Esp32 and the configuration of this module (jumpers). The information I've dug up is quite contradictory on several issues hence I'm looking for people who have had any physical contact with this module. Thank you in advance for any information.

>>21861820

I'll do it tomorrow

Greetings....

Hello.
It would be nice if there was a way to power the PAM8304 through some sort of contactor so that it would energize with the radio running.

I have ordered myself a PAM8406 for the time being.
Anyone know or has tested it? A little more power and probably a better class of amplifier, and there are versions with built-in potentiometers.

As for the potentiometers, I guess you'll have to solder them on the underside to set the value. It's a shame they came out under PCM.

As for me the big improvement is the more detailed descriptions on the board. I missed this in the previous version. I had to make sure several times where the ground was and where the plus was, e.g. in the encoder.
If this is not a big problem then describing the component values would be great because you don't have to look at the schematic or at the card And I miss the description at the IR sensor output.
But yes it's a super job @DJCheester

dawidkosciesza wrote:

It would be nice if it was possible to power the PAM8304 via some sort of contactor so that it would excite with the operation of the radio.

Hello

I'm thinking of changing the PAM8403 to an amplifier with a digital i2s input which should eliminate buzz and other noise, it has a standby option, if Robgold sacrifice one GPIO to control the amp then you have a ready made circuit to switch off the amplifier along with the radio.

dawidkosciesza wrote:

I've ordered myself a PAM8406 to try out.
Anyone know or has tested it? A little more power and probably a better class of amplifier and there are versions with built-in potentiometers.

Same thing only more power (theoretically)

dawidkosciesza wrote:

What about the potentiometers, I guess you will have to solder them on the underside to be able to set the value. It's a shame that they came out under PCM.

Yes they are under the module, one is slightly extended which will allow you to set the level of one channel on off, you can remove the PCM and set the other identically, these potentiometers are for a one time level setting, I don't think anyone will mess around in there afterwards.

dawidkosciesza wrote:

A big improvement for me are the more detailed descriptions on the board. I missed this in the previous version. I had to make sure several times where the ground where the plus e.g. in the encoder.
If this is not a big problem then describing the values of the components would be great at all because you do not have to look in the diagram then or in a sheet of paper and I miss the description at the output of the infrared sensor.

For the IR there will also be descriptions of the values also maybe somehow squeeze in

The PCB is in the process of being designed so anything could still be possible....

Greetings ....

>>21861820

I have bought on Aliexpress in a larger package twice and twice they sent different ones but the hole spacing fits perfectly.

Here are pictures of the 2 modules in the PCB.



You have some with the inscription HW-104 it comes out not to buy these. But with the Chinese it's difficult to get along, they have different pictures and pack others. Greetings ...

>>21862303
Hi .
I have a PAM8406 v 1 projection and I would say that it plays better as a PAM 8403. on PAM8403 I feel a time like a
snporczenje .... On PAM8406 there is a silence instead of sound, picanja przetvornici on a display. Also it is good that PAM8406 has already potentiometer regulators on LINE in and with this you can adjust volume.

robgold wrote:

From version 3.20.04 there are presets, you can program in each bank the first stations from 1-10 as your favourites and with one click of the buttons 0-9 the radio will select the appropriate station. The presets function should also be enabled in the radio settings.

Buddy @robgold how to store your favourite radio station from the selected Bank to the respective 0-9 button.
Preset" function enabled in the settings, or do you have to physically move the favourite stations in the respective bank from 0-9?

>>21861956 The PCM1802 is not a DAC but an ADC-> "Analog-Input 24-Bit, 96-kHz Stereo A/D Converter", i.e. it converts the analogue input into digital i2s.

@grzes_dst
There is no memorisation, I didn't want to create another bank of "presets". You simply arrange the first 10 stations in a given bank as you like and access them with a quick dial.

Yes, I know it's an ADC, but I'm looking for people who have had exact contact with this board because it's probably the only one available and unfortunately it has a lot of bugs so far I've scrolled through 3 pieces from Ali and each one surprises me with something else

Hi Robgold,
how is it remembering the station the player has when the power is on, off.
I set myself in the setting ..bank no.txt -16, station no.txt -6, so that the Slovak station is playing, and then I listen to some other station.... in bank 10..., or in another bank, and when I turn the radio off and on a few times, it changes to playing the station from bank 1, no.1.
Somehow, my set bank is not remembered. When I look in the setting, it is changed to bank 1, station 1.
Thank you

>>21863008 I don't really understand how you would want to link this to the radio ? Apart from the fact that this PCM doesn't look complicated somehow. Put it in "master" mode, an analyser or oscilloscope to hand and some basic DAC e.g.: PCM5102 as output. Pair it together, throw in some signal and see.

Added after 1 [hour] 46 [minutes]:

>>21863122 Bank and station are remembered by writing to the files Bank.txt and Station.txt, both files are in SPIFFS/LittleFS memory or SD card. If for some reason your card/memory is not working properly then the radio will automatically set bank 1, station 1. Check for yourself in this case that you can see the contents of the card/internal memory in the file explorer in the menu. The logs on the terminal should also show that the configuration could not be read.

Hi, I don't have an SD card, only the ESP32S3 memory... Look, the menu is configured.

You have LittleFS memory configured, i.e. without a card or Autostorage. If you want to use the card rigidly, find at the beginning of the code

For commenting everything just leave the sd definition





Greetings....

Added after 43 [minutes]:

dawidkosciesza wrote:

I've ordered myself a PAM8406 for trial.
Anyone know it, tested it? A little more power and probably a better class of amplifier and there are versions with built-in potentiometers.

As for the potentiometers, I guess you'll have to solder them on the underside to set the value. It's a shame they came out under PCM.

I tested the PAM8406 amplifier, for me it makes no difference in terms of quality both play the same.

Well now some myths to dispel.
Power or more powerful - No
PAM8403 2x3W at 4ohm speakers
PAM8406 2x5W at 2ohm speakers
PAM8406 2x3W at 4ohm speakers.
It comes out to the same thing.
In addition, the PAM8406 has the option to work as a class AB linear amplifier, there is an input to switch the mode, but on this module it is not led to the goldpin, but on the PCB of the amplifier is permanently selected class D, so here it does not differ from the PAM8403.

The only option that speaks in favour of its use are the PRs (they used to be called horseshoes - by the way, I wonder if any of the youngsters today have come across such a name).

And the problem of inconveniently placed potentiometers would be solved. Take a look.




Further changes to the PCB - we are mounting the PAM8406 with PRs.




And so it is in 2D on



And the name horseshoe itself comes from the first mounting potentiometers very much resembling horseshoes. This is such an offtopic 😀



Any ideas on the PCB yet ?
Instead of the IR there will be a JST4pin connector with one pulled out so that the spacing remains at present and if necessary give a 4pinJST plug and drive the receiver out on the wire.

As for the chokes in series with the speakers, maybe they will appear tomorrow as time allows, I will test if it makes a difference by mounting them on the cable to the speakers.

Regards...

Greetings...

DJCheester wrote:

Any ideas for PCBs yet ?

Hey, if I'm interpreting the jlcpcb price list correctly, there is a lower price up to size 100x100.
And like the previous speaker, the component values on the board would be cool.
On the descriptive layer of the bottom layer, you can give the electrode logo for the whole size of the board xD.
On the descriptive layer of the top layer, you can insert some revision number of that board.

I just ordered the boards from jlcpcb and those 5 pieces came out to ~18zl with shipping, I don't know if even ignoring the man-hours it is possible to make those five boards with a thermal transfer at home for that amount.

The project itself is very worthy and I congratulate all authors and contributors!

Damian_Max wrote:

Hey, if I'm interpreting the jlcpcb price list correctly, there is a lower price up to size 100x100.

You are interpreting correctly but above that there is also no tragedy when it comes to necy a tile within 10zł is not a fortune after all 😀

Except that you need to take 5pcs but I think you can resell the rest without any problem.

Damian_Max wrote:

And like the previous speaker, the component values on the board would be cool.
On the descriptive layer of the bottom layer you could give the electrode logo for the whole size of the board xD.

I'll try to add element values instead of descriptions, I also don't want it to be overblown and make it look reasonably nice.

As for the electrode logo, I don't know if I have a license for that 😀 You'd have to ask the decision makers on that.

Damian_Max wrote:

On the description layer of the top layer, you can insert some revision number of this board.

This is what I was thinking of and will be.

Damian_Max wrote:

I just ordered the boards from jlcpcb and these 5 pieces came out with shipping for ~PLN18, I don't know if even disregarding the man-hours it is possible to make these five boards with a thermal transfer at home in this amount.

I've done a lot of PCB thermal transfer and I'll say that it's impossible to make a PCB at this price at my place, a laminate the size of half an A4 sheet is 15zł and the other half sodium persulphate.
Apart from that a drill bit and messing about with it all.
To answer, it is impossible to make a PCB at home at this price. And here you have a pro with soldermask and clean hands.

Damian_Max wrote:

The project itself is very worthy and I congratulate all the authors and people who contributed to it!

On behalf of everyone who had a part. Thank you 😀

I will make further changes tomorrow and show for public review.

Regards...

Gentlemen, the author's DJCHESTER boards have arrived and i....my esp 32 is missing, the previous links are not up to date, is this esp model good and is it with an external antenna so that you don't have to solder these microscopic jumpers?
https://pl.aliexpress.com/item/10050094881051...107314%21%212%210%21&gatewayAdapt=glo2pol


about the boards
i miss the option to choose whether RCA on the board or Pin and to the chassis wall. possibility to solder either pins or a holder with terminals

It might be worth adding the robgold -a resistor on the DAC ground mentioned by a colleague. >>21859499

amrowek wrote:

I am missing the option to choose whether RCA on the board or Pin and to the chassis wall. possibility to solder either pins or a holder with terminals

Eek something is lying to me here.



You can solder RCAs to yourself and ARK 2-pin or 3-pin where in the 3pin the middle one is the audio signal and the side ones are the ground.

I don't want to put two markings on the soldermask because it will make a mess.

Greetings....

Added after 3 [minutes]:

With ARKs you can use the sockets on the wires, and the version as it is now is just the ready inserted all the sockets on the back of the case.





Unless I have misunderstood you then explain what you mean.

Greetings ...

Added after 32 [minutes]:

ArtXs wrote:

Maybe it would be worth adding the resistor mentioned by robgold's colleague on the DAC ground. >>21859499

Well, by all means, kudos to you....

DJCheester wrote:

Now some myths to dispel.
Power or more powerful - No
PAM8403 2x3W at 4ohm speakers
PAM8406 2x5W at 2ohm speakers
PAM8406 2x3W at 4ohm speakers.
It comes out to the same thing.
As additional things PAM8406 has the option to work as a linear amplifier class AB is an input to switch the mode of operation, but on this module is not brought out on the goldpin instead on the PCB of the amplifier is permanently selected class D, so here it does not differ from the PAM8403.

You are right about the power, I looked a bit in the technical data of this amplifier and the AB amplifier class also has a power of about 3W/4ohm. The choice between the amplifier class is to feed a Low(class AB) or High(class D) signal to leg #9 (mode).
You might want to try running class AB, the descriptions say it is more immune to EMI interference.
It would also be a nice option to be able to shut down the amplifier using foot No. 12 (Shutdown Control Input) activated by the Low signal.
This would easily control the switching of the amplifier directly via the ESP32 and eliminate noise during the radio's Standby mode.