Wave Shield without potentiometer

by Aeroduino on Wed Sep 25, 2013 4:10 pm

Hello,
I want it to be on maximum volume all the time and I need the space, so can I remove the audio thumbwheel potentiometer? Which through holes should I connect with eachother?

thanks
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Re: Wave Shield without potentiometer

by adafruit_support_bill on Wed Sep 25, 2013 4:25 pm

Looking from the back-side, it would be these pins:
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Re: Wave Shield without potentiometer

by Aeroduino on Thu Sep 26, 2013 8:40 am

Great! Thank you!! One more question. Which one of your speakers is the loudest one? The 4 ohm or the 8? I have the 4 ohm now and I would like it to be juuuust a bit louder.
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Re: Wave Shield without potentiometer

by adafruit_support_bill on Thu Sep 26, 2013 9:05 am

The 4-ohm speaker would be the loudest. The on-board op-amp is only a fraction of a watt, so it is not loud by itself. But you can connect it to an external amp for more volume. We have this class-D amp: http://www.adafruit.com/products/987 But it will also work with any powered speaker systems.

Computer speakers are great for stationary use. If you need to go portable, there are speakers designed for iPhones and MP3 players that will work with the shield as well.
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Re: Wave Shield without potentiometer

by Aeroduino on Thu Sep 26, 2013 12:04 pm

I see. Can I substitute the 8 ohm for a 4 ohm in this package?
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Re: Wave Shield without potentiometer

by adafruit_support_bill on Thu Sep 26, 2013 12:13 pm

Can I substitute the 8 ohm for a 4 ohm in this package?

Which package?
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Re: Wave Shield without potentiometer

by Aeroduino on Fri Sep 27, 2013 8:21 am

adafruit_support_bill wrote:
Can I substitute the 8 ohm for a 4 ohm in this package?

Which package?


Sorry, this one http://www.adafruit.com/products/175
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Re: Wave Shield without potentiometer

by adafruit_support_rick on Fri Sep 27, 2013 8:54 am

Sorry - but these are all pre-packaged. We can't make substitutions.
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Re: Wave Shield without potentiometer

by adafruit_support_bill on Fri Sep 27, 2013 9:30 am

Also be aware that running a 4-ohm speaker with the volume hard-wired to the max risks overloading the op-amp. If you really need more volume, the best way to achieve it is with an external amp or powered speakers.
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Re: Wave Shield without potentiometer

by Aeroduino on Sun Sep 29, 2013 9:30 am

Thanks for fast answers. I will continue in this thread unless you want me to start a new one... Seems my shield died today :( It has been playing a bit wierd today, like cutting off in the middle of a playing file and then after 2-3 seconds continue to play the file from where it stopped.. Now it won't play at all! I tried your Pi example and it comes to "Pi speaker", then nothing...

Any ideas? I have been using 8ohm 0.2W speaker on max volume.
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Re: Wave Shield without potentiometer

by Aeroduino on Sun Sep 29, 2013 9:36 am

Seems SdReadTest example does not work eather... It does not give me any error though. Like "init failed".. Just "type any character to start" and then dead.
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Re: Wave Shield without potentiometer

by adafruit_support_bill on Sun Sep 29, 2013 10:02 am

Have you tried the CardInfo sketch from the SD library? (Be sure to change the chip select to pin 10.)

It could be an intermittent connection somewhere. If you post photos of the front and back of the board we'll take a look.
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Re: Wave Shield without potentiometer

by Aeroduino on Sun Sep 29, 2013 10:30 am

CardInfo failed. Here are the pics.. You don't have to compliment me for the great soldering :D

Image

Image
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Re: Wave Shield without potentiometer

by adafruit_support_bill on Sun Sep 29, 2013 10:34 am

You have the chip select jumper soldered to pin 9 instead of pin 10. In your sketch, change the CS from 10 to 9
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Re: Wave Shield without potentiometer

by Aeroduino on Sun Sep 29, 2013 2:17 pm

You told me it is ok to use pin 9 in this post viewtopic.php?f=22&t=43196&p=215160#p215160

And it has worked great until today! Any ideas? Even though my solds are bad, I can't see anyone missing contact..
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