Hi everyone, as the title suggests.I'm looking for a solution for use a rotary selector to switch songs in the mp3 player integrated in the amplifier.
It is a cheap tda7498 based amp which include a bluetooth receiver, aux input and TF card input.
My main need is to use the sd card input and change songs using a rotary selector, when I turn it clockwise next track and when I turn it anticlockwise previous track.
I have 3 pins to do that, which also increase the volume with a long impulse.
What component can I use to do the trick if it is possible?
I searched the threads but I didn't find anything useful.
Thanks
It is a cheap tda7498 based amp which include a bluetooth receiver, aux input and TF card input.
My main need is to use the sd card input and change songs using a rotary selector, when I turn it clockwise next track and when I turn it anticlockwise previous track.
I have 3 pins to do that, which also increase the volume with a long impulse.
What component can I use to do the trick if it is possible?
I searched the threads but I didn't find anything useful.
Thanks
Something like this should work (or a similar rotary SPDT momentary switch):
Buy Rotary Switch Single Pole, Double Throw, Momentary On-Off-Momentary On SPDT in Cheap Price on Alibaba.com
Buy Rotary Switch Single Pole, Double Throw, Momentary On-Off-Momentary On SPDT in Cheap Price on Alibaba.com
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Thanks, I already have seen solutions like that but I was searching something with 360° rotation.
🙂
Are you looking for a rotary encoder control? There are hundreds of them, do you want a push-button action too?
What microcontroller is doing the work - you will have to code up the track select feature into it.
What microcontroller is doing the work - you will have to code up the track select feature into it.
Not interested in the volume control, there is another potentiometer for that.
I was also looking at the encoders, but I'm a complete noob in that field.
Thanks for your replies and sorry for bad english
Anyway, this is the board.
Attachments
That's a XH A105 board, as can be bought here:
XH A105 Bluetooth 5.0 TDA7498 carte amplificateur numerique 2x100W Module d'ampli Audio stereo prise en charge de la carte TF AUX-in Amplificateur from Electronique on AliExpress
A rotary encoder will not achieve what you want without some additional electronics. However, the switch I indicated will give exactly the functionality you require.
XH A105 Bluetooth 5.0 TDA7498 carte amplificateur numerique 2x100W Module d'ampli Audio stereo prise en charge de la carte TF AUX-in Amplificateur from Electronique on AliExpress
A rotary encoder will not achieve what you want without some additional electronics. However, the switch I indicated will give exactly the functionality you require.
Exactly, thanks a lot.
If I wanted to assign a defined track to every position using a differen switch (like 12 ways) should I use a board like this?
https://m.it.aliexpress.com/item/32969182876.html?trace=wwwdetail2mobilesitedetail
Thanks again.
That board has a controller chip on it, that controls everything and isn't programmable as far as I can tell, no ICSP header, it may be an ASIC anyway.
I can see the SD card socket, but there's no indication how you'd change tracks on it anyhow - the only expansion connections seem to be for external volume adjust.
Is there a way to change tracks on the SD card currently - for instance the volume control may have push-button action.
You can change track with this contacts, long pressure for volume. I'm looking for a 360 rotary switch to do the trick
