Using the DY-SV5W audio player

Projects General Guidance
1

Here is it datasheet: https://grobotronics.com/images/companies/1/datasheets/DY-SV5W%20Voice%20Playback%20ModuleDatasheet.pdf?1559812879320=&srsltid=AfmBOoq0CJYKKkBQx6UqtHXBJyy-tuZ2KzqXOg3vnyE_wAAWWfHjtD8Z

I wonder If I power it from 9V battery via 5V regulator how long it could work if using 5W 8R speaker?

Regarding the modes: I need one button to move between all audio files in folder. Is that possible?

and what if I want to move to next song but to have the ability to go to the previous one do I need two buttons?

Will it be possible to feed this board less then 5V? (using 3x AA 1.5V batteries)
Thanks

2

You really need to be more clear about the battery. We need mAh of the battery...
If you mean a 9V fire alarm battery: maybe 15 minutes... maybe not at all...

3

This battery: https://www.duracell.com/wp-content/uploads/2020/02/9V-Duracell-Plus.pdf

4

That will not suffice.

5

what do you mean? how long it will last?
If I will use that board instead? DFPlayer Mini Mp3 Player - DFRobot Wiki
and I will power it with 3x AA 1.5V battery how long it could last?

6

That should work.
Depending on how loud, maybe a few hours.
Depending also on mAh that you did not mention...

1 Like
7

You mean work using the DFPlayer Mini and also to power it with 3xAA 1.5V batteries?

I need it to work for about 30 min in total not more...

Regarding the DFplayer Mini - I can see is rated to use with speaker of 3W. If I have 8R 10W speaker I could also use it? It is just mean it will not be able to drive my speaker to its fully potential of 10W ?

8

About 35 minutes

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9

could you please explain the calculation you made?
All this subject of watts and power is hard for me to grasp. Any reads on that matter?

10

so if I change the volume knob to half it should last for double the time right?

11

I have 3 9V rechargeable batteries. One rated for 170mAh , the seconds rated for 600mAh and the last rated for 6800mAh

12

In theory, yes
My estimate was for 5W output with 75% efficiency and typical 9V battery
The efficiency may go up or down or stay the same with less volume, who knows.

13

Time (h) = capacity (mAh) x voltage(V) / powerconsumption (mW)

Take into account that you waste almost 50% if you use a linear regulator from 9V to 5V.

Also: a pot on an amplifier is usually not linear but logarithmic... halfway may be far less than half the power...

Class A/B amplifiers will have better efficiency at louder volumes...

Class D amplifiers have better efficiency.

Dfplayer may be class D, but I do not know...

14

Really? Are you saying that you will only use it once? Or only for 30 minutes each ‘session’? How long between such sessions? You’d be happy to replace the battery after every 30 minutes if that’s all that it lasts? Yet elsewhere in this thread, you refer to a much larger capacity 9 V battery?

Please tell us exactly what you want to do.

15

Yes.

Could be days.

I want to be able to play multiple audio files and drive a 8ohm speakers. Using a battery (the device should be remote and not need of PSU

16

What stage have you reached? Do you have the module? Have you tried it with an Arduino sketch?

Obviously, use the largest capacity battery you are happy to leave in it for long periods, or remove and then replace it as and when it’s needed.

17

The smallest capacity batteries may not be suitable to feed a 5W amplifier...
Usually capacity and max current are correlated, but exceptions exist...

18

I am waiting to both the DFplayer mini and the DY SV5W to arrive.
If the DFplayer will have sufficient power to drive the speaker to a volume that is good for me I will use it. If not - I will try the DY SV5W module.
I would prefer the DFplayer as I can power it from 3X AA 1.5V batteries and will not need voltage regulator as if the SV5W (as it require exactly 5V).

I guess the advantage of the SV5W module is that the quality of audio is better and it can drive more powerfull speaker

btw - I hope I will not need to use Arduino as my wish from this project is only to play audio files with one button press. each press will play the next track that in the folder.

19

You don't need an Arduino. Use the AD or IO keys in the player module itself, as described in the DFR documentation.

Volume should be loud enough to fill a normal home room. One of my juke boxes uses two 4 ohm 3W speakers in series.

20

So I received both the DF player mini and the DY SV5W.
The DF player mini is not working either with 3X 1.5V AA battery nor with 9V battery and 5V voltage regulator.

the DY SV5W works only with the 9V and the 78l05 regulator.
I wonder about the latter if it is valid to use it with this regulator? how long it can last with 8R 3W speaker?