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Topic: cheap sound module: what version is this? (Read 39036 times) previous topic - next topic

onesky

Jun 20, 2012, 08:26 pm Last Edit: Jun 21, 2012, 12:39 pm by onesky Reason: 1
today i received this sound modules i ordered on ebay hong kong, they should accept serial commands as confirmed by the seller. What i don't understand is the version i got. On the ebay auction it was showed the "V1.4" and the description says "DC2.5 ~ 4.5V"



Now this board shows "V1.5 / 2012.01.12", and "5v  / 3.3v"

that means i can power it via arduino 5v?

someone have the right datasheet for this version? i have found this one but it's outdated.

I sent an email to the seller, waiting the response.

johnwasser

From the picture I see it has a solder jumper for selecting between 5V and 3.3V (currently set to 3.3)

Looks like only 6 of the 8 pins on each side are populated.

The pinout seems to match this (pretty crappy) document for the WTV020-SD-16P:

http://www.elechouse.com/elechouse/images/product/MP3%20Sound%20Mini%20SD%20Card%20Module/MP3%20Mini%20SD%20Card%20Module.pdf
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onesky

thanks for your exam
do you think if i change the solder of the jumper to the 5volts, it will burn when connected to the arduino 5v?

or can i use a resistor to power it at 3.3volts with arduino?


the-rebel-agent

Don't Arduino nano have a 3.3v output?

johnwasser

> Do you think if i change the solder of the jumper to the 5volts, it will burn when connected to the arduino 5v?

I think you should change the jumper to 5V if you are going to use 5V power and logic.

> Can i use a resistor to power it at 3.3volts with Arduino?

You CANNOT use a resistor on the power line to regulate voltage.  Either use 5V power or 3.3V power.  Set the solder jumper to match.
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onesky


Don't Arduino nano have a 3.3v output?
yes but .. "when running on external (non-USB) power, the 3.3V output (which is supplied by the FTDI chip) is not available"
http://arduino.cc/en/Main/ArduinoBoardNano

so i think i will try to change the solder to the 5volts pin as suggested by Johnwasser (thank you)

onesky

#6
Jun 27, 2012, 09:28 pm Last Edit: Jun 27, 2012, 10:29 pm by onesky Reason: 1
edited.

JM33

I have similar problem with yours and  I find an alternative. This module playbacks directly mp3 files in stereo. Without the need to convert. 

the-rebel-agent

Got the same one. Which brand of SD card are you using?

xl97

Im confused... :)

the one you have pic of...'looks' like it uses micro SD?  (uSD socket?)

is this correct?


the hong kong store/link..looks like it uses a regular (larger) SD card?   is this correct?


Id like to get one if its microSD...

let me know.

thanks!

the-rebel-agent

Mini is just a name, It uses a micro-sd card. Bought the same from that link.

xl97

mini?

I just wanted to confirm that is didnt use NORMAL (large) sized SD card.. and did, in fact use the micro SD card..

the pics were bit deceiving..

good to knwo it 'does' use all SMD copoennts & uses a micro SD card..

(going to order 1 or 2)..

anyone get theirs up and running yet? would be interested looking at the code/interface (class functions) used/created.


the-rebel-agent

I said mini cause eBay listing says mini. In the other hand, we are in the same boat. If I am lucky today, will be able to get a 1gb micro card to test the board tonight. Keep you posted.


the-rebel-agent

plugged everything and nothing. Just the led blinking twice and later, just keeps on. I assume that he is not reading the card cause I erased everything from the sd card and still doing the same.

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