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Repeating sound and hardwire for power, no battery
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Repeating sound and hardwire for power, no battery

by DrMasst on Wed Aug 04, 2021 3:54 am

HELP Trying to find the playground or sound board we need for special project.

***Can a playground be programed to play 3 different frequencies in a row? first one for about a minute and then the next frequency and then the last one. then repeat, repeat, repeat.....
***Also can a playground be powered by a USB type cord? Battery powered will not work for what we are trying to create.
We dont really need the color, just something to play the frequencies and be hardwired for power.
*** Can a playground (or something similar) be placed in resin, with the USB connection area exposed and accessible?

Thank you all soooo much!!

DrMasst
 
Posts: 2
Joined: Wed Aug 04, 2021 3:46 am

Re: Repeating sound and hardwire for power, no battery

by dastels on Wed Aug 04, 2021 11:26 am

1. That shouldn't be hard at all. Of course it depends on how fixed or dynamic control over the tones and timing will be.
2. It can definitely be power via the USB connection.
3. Certainly, as long as it is a non-conductive resin or epoxy. Note that it would likely muffle the onboard speaker. Also, carefully consider whether you would need acess to the reset button (a separate wire could be used to externalize a reset button.

Dave

dastels
 
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Re: Repeating sound and hardwire for power, no battery

by DrMasst on Wed Aug 04, 2021 11:56 am

Dave thank you for your comment/help.

1) we were looking at the FX Mini sound board wav/ogg trigger 16mb flash, but again wasn’t sure if this would be able to be powered usb.

A) this is the board we thought we could use to ‘upload’ the 3 specific frequencies/tones & time them accordingly at 60 seconds each & on continuous repeat until device was unplugged.

B) plus I think this one has a speaker built in, if I’m correct. Not sure about the playgrounds, but seems we need to add a speaker to make it work?
*** any idea which product would be best?

2) resin: yes we thought about a non-conductive one would be best but wanted advice, like yours. So thank you for confirming.
A) reset button: didn’t even think about this part. Hmmm??

DrMasst
 
Posts: 2
Joined: Wed Aug 04, 2021 3:46 am

Re: Repeating sound and hardwire for power, no battery

by dastels on Wed Aug 04, 2021 12:57 pm

1) The problem is that when USB is connected, you can manpulate the files on the board, but not play them. You can only play sounds (via the triggers or UART) when the board is powered some other way (battery or power pins). The key is the USB data connection. You can use a charge-only cable to power it via the USB connector and have it play.

A) That would work. If you had all 3 tones in one file you could name it to "loop while triggered" and wire the trigger line to ground.

B) None of the audio FX boards include a speaker. Ther are models (2M and 16M versions) with line out, onboard amplifier, and headphone jack. Speak selection would depend heavily on the goal. I.e. how loud, what sort of enclosure, etc.

2) If you're using an audioFX board you can probably not worry about the reset button. And power cycling would reset it.

Dave

dastels
 
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