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Grogster

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Joined: 31/12/2012
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Posted: 04:48am 10 Jan 2018

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Remember when MP3 player modules used to be $50 or more?

I do.

Now you can get a basic one for 50-cents, assembled, with uSD card slot.

50c MP3 player

Somehow for that price, they have even got a 2W audio amp on it, so hook it to a speaker, and away you go. For the price of these things, I just HAD to get a couple.

This is a very simple playback device, and does not even have a serial interface, just buttons on an ADC pin.

GDP2846 Datasheet (Chinese)

I will have a tinker with these things when they arrive, but for adding simple sounds or music to a project, you can't really get any cheaper then this!

EDIT: Datasheet after running it through Online Document Translator:

English attempt at datasheet

Some of the formatting is wrong in the translation, but you can certainly read more of the translated version then the Chinese version.Edited by Grogster 2018-01-11

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Azure

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Joined: 09/11/2017
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Posted: 05:04am 10 Jan 2018

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Plus an FM tuner on the board.

Grogster

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Posted: 05:28am 10 Jan 2018

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I THINK you need an external FM radio chip if I decipher the Chinese datasheet correctly. I think there are a few supported FM radio chips it can talk to, but I don't think this is on-board.

Smoke makes things work. When the smoke gets out, it stops!

Azure

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Posted: 05:59am 10 Jan 2018

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I had a reread and I think you are spot on (my mistaken assumption on reading the specs quickly). Given the board has 2 chips the main GDP2846 and another which I assume is the audio amp IC. Then the FM IC must not be loaded.

CaptainBoing

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Joined: 07/09/2016
Location: United Kingdom
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Posted: 10:42am 10 Jan 2018

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I use(d) something similar but smaller in the feedback pods that work with my snooker/pool table controller. The pod has an mp3 player + audio amp to play fire-alarm message etc.

This might be nicer as it has everything onboard - will grab some and play

Boppa
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Posted: 10:56am 10 Jan 2018

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Jeez- it makes you wonder how they can make a profit at all at that price- surely even in bulk, the components have to be worth more than that...

robert.rozee
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Posted: 11:39am 10 Jan 2018

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you'll often find some/many of the components used are end-of-reels, surplus, obsolete, or expired stock, available the the people making the boards for just the recyclable materials (gold/copper) value. this is why an assembled product may appear for just a few months, then never be seen again - once key components run out (and the manufacturer may only have a few thousand to start with) there is no ability to make more.

cheers,
rob :-)

Grogster

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Posted: 09:55pm 10 Jan 2018

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@ Boppa: My thoughts EXACTLY.

@ Rob: You probably have that right in this case.

Smoke makes things work. When the smoke gets out, it stops!

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