Noise when the DFPlayer Mini MP3 turn off
xoooox 2016-05-26 09:34:08 10471 Views6 Replies Hi,
I buy a DFPlayer Mini MP3 and I use it with arduino one.
I connect the DFPlayer like the photo.
If I play the music the device work fine, but when i stop the music ( mp3_stop() ) I listen the a little noise.
If I change the power from the 5v to 3.3v (from arduino) the noise is reduced but there is always.
I am using this project to build an alarm clock and the noise at night bothers.
Exist a software command for switch off the device? (I try with mp3_sleep() but it seems that nothing changes)
How can I reduce this noise?
Thank you
I buy a DFPlayer Mini MP3 and I use it with arduino one.
I connect the DFPlayer like the photo.
If I play the music the device work fine, but when i stop the music ( mp3_stop() ) I listen the a little noise.
If I change the power from the 5v to 3.3v (from arduino) the noise is reduced but there is always.
I am using this project to build an alarm clock and the noise at night bothers.
Exist a software command for switch off the device? (I try with mp3_sleep() but it seems that nothing changes)
How can I reduce this noise?
Thank you
2016-06-01 22:55:58 The module working current = mini player working current + loud speaker
So recommand using a transistor @>1A like, S8050 S8550 (both 1.5A)...
https://www.dfrobot.com/index.php?route= ... 06ByHqEC-U Leff
- MP3 Mini player: standby20mA, suppose the working one as 100mA)
- speaker: depends on yours, reference one 3W, 8Ω ——> 620mA
So recommand using a transistor @>1A like, S8050 S8550 (both 1.5A)...
https://www.dfrobot.com/index.php?route= ... 06ByHqEC-U
Leff 2016-05-31 03:27:46 Hi, can you recommend a transistor model?
I saw a 2N7000 or 2n2222 would be fine? xoooox
I saw a 2N7000 or 2n2222 would be fine?
xoooox 2016-05-27 23:00:07 
Well, very thank you to try, so the last thing worthy to try is to SHUT DOWN it according to ur diagram using a transistor. Leff
Well, very thank you to try, so the last thing worthy to try is to SHUT DOWN it according to ur diagram using a transistor. Leff 2016-05-27 09:29:38 Hi, I try with another power supply but the "very little noise (swish)" is always present (when the music is stop). xoooox
xoooox 2016-05-26 22:57:43 No problem that is, I still advice you could try another power supply to MP3 module but not from Arduino. Leff
Leff 2016-05-26 22:38:26 Hi,
Yes, I use two 1k resisters (like mine and yours scheme). If I don't use the resistors the noise is very high.
Now I use the "Case1" (see the picture).
For turn off the device I can use the "Case2" with a transistor? I can damage the device to turn on and off? xoooox
Yes, I use two 1k resisters (like mine and yours scheme). If I don't use the resistors the noise is very high.
Now I use the "Case1" (see the picture).
For turn off the device I can use the "Case2" with a transistor? I can damage the device to turn on and off?
xoooox 