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I'm trying to use a cheap mp3 player to play song using Arduino, I couldn't find the datasheet of the main chip but I made some progress identifying some pins.

                 Pin
                1  16  Busy  
Play/Stop IO1   2  15  GND
Prev/Vol- IO2   3  14 
Next/Vol+ IO3   4  13
                5  12
                6  11 SPK -
                7  10 SPK Right
                8   9 SPK Left 

This looks very similar to the picaxe by8001 and the WT5001

I will need some ideas to find the datasheet or at least find RX/TX/ADC KEY pins.

unknown_chip_JL

More pics here

Note: Why not use mp3 module for arduino? I try the WTV020 with no luck, I could buy a dfplayer or the WT5001, but this mp3 player cost 1/5 of those modules.

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  • \$\begingroup\$ How is the arduino involved? Are you using it to play and pause the MP3 player? Also I believe the company of the IC is Chinese, which explains why a datasheet is hard to find (also why it is so cheap). I could be wrong. \$\endgroup\$ – Bradman175 Jun 29 '16 at 18:49
  • \$\begingroup\$ Without a better picture of the board is hard to say. What makes you think it has a serial port? \$\endgroup\$ – Passerby Jun 30 '16 at 2:56
  • \$\begingroup\$ @Passerby I'm trying to identify the logo. It looks like the Greek character Pi. \$\endgroup\$ – Bradman175 Jun 30 '16 at 5:56
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    \$\begingroup\$ I didn't even notice that. I thought it was JL. \$\endgroup\$ – Passerby Jun 30 '16 at 6:26
  • \$\begingroup\$ @Passerby I think it has serial because this is very similar to the by8001 and the wt5001. Play, Next. Prev pins work, like the data sheets of the original chips. Also when pulldown with a 20k resistir on pins 3 and 4 they change to fast foward and fast reweind. And those data sheets mention similar key mapings using diferent resistor on the pull down. And there are 7 unkown pins left, they could be vcc, tx, rx, key1, key2. One of those similar chips has bat+ and bat-. And this board has a rechargable battery and no other chips on board that could charge the battery. \$\endgroup\$ – James Jul 1 '16 at 3:17
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There seems to be a common design for these cheap mp3 players. And the labels seem to be pure confusion or some kind of serial number.

There’s a version with and without LCD display, the chips are probably very simlar. The LCD version displays "ic type: ht2836 firmware ver v1.00".

The chips seem to be sold by chipkingdom (the site also has a few "datasheets", look out for the GPDxxxx MP3 stuff). GP is for General Plus who designed these chips to begin with, but no further information is available on their website.

Here are some further more or less interesting links that deal with the chip:

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It is a Jerry mp3 AC1082, a cheap encoder Chinese IC

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After what felt like ages of googling, I found that it's made by Jie Li Electronics, a company based in Taiwan that mainly makes transistors, resistors, and capacitors. They also make these ICs but I couldn't find any info on them. I'm looking for a similar IC from this same company, but I can't find any info on these.

So that logo isn't a Pi, it's actually a JL like most of us assumed it was.

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