music box - Electronic Circuits Projects Diagrams Free

jonr · 17th November 2007, 07:58 PM

Hello,

I am trying to build a battery or solar powered music box. I understand there is a battery powered kit I can purchase at a local radio shack with a speaker, but it only will play twenty seconds of audio. I'm curious if anyone has any suggestions about what parts I may need so I can have up to 4 minutes...and if a solar powered music box is possible?

Thank you in advance!

Jon R

iONic · 17th November 2007, 08:49 PM

Quote:

Originally Posted by jonr

Hello,

I am trying to build a battery or solar powered music box. I understand there is a battery powered kit I can purchase at a local radio shack with a speaker, but it only will play twenty seconds of audio. I'm curious if anyone has any suggestions about what parts I may need so I can have up to 4 minutes...and if a solar powered music box is possible?

Thank you in advance!

Jon R

Buy large enough solar panels and you can power just about anything.
Are you looking to play radio, music from a portable mp3 player? Why only
4 minutes?

Here are a couple of ideas:

http://www.instructables.com/id/DIY-...mbox/?ALLSTEPS
http://zedomax.com/blog/category/solar/

HarveyH42 · 17th November 2007, 10:40 PM

I've had a similar project sitting on my bench for about a year now, other things to work on...

Anyway, I got some 16 meg MP3 players surplus for $5 each, hold about three songs. Audioguru help me get it to play automatically when power is supplied. A LM386 audio amp wasn't loud enough at a reasonable solar powered battery option. So it sat for a while. Found some more surplus, a little amp with speakers for Gameboy $3.95, loud enough, but runs on a 9 volt battery, has a 6 volt adapter socket. Haven't gotten around to doing the 6 volt supply, solar charger, dark-activated switch, LM317 for the 1.5 volts to run the MP3 player. Anyway, pretty well worked it out, just not a lot of spare time for that one. Was kind of hoping to get an AVR microcontroller to work as the dark activated switch, so I could put a long delay on it, and switch it off when the song was done. Could also use it to start the player, and save some soldering.

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17th November 2007, 07:58 PM	(permalink)
jonr	music box Hello, I am trying to build a battery or solar powered music box. I understand there is a battery powered kit I can purchase at a local radio shack with a speaker, but it only will play twenty seconds of audio. I'm curious if anyone has any suggestions about what parts I may need so I can have up to 4 minutes...and if a solar powered music box is possible? Thank you in advance! Jon R

17th November 2007, 10:40 PM	(permalink)
HarveyH42	I've had a similar project sitting on my bench for about a year now, other things to work on... Anyway, I got some 16 meg MP3 players surplus for $5 each, hold about three songs. Audioguru help me get it to play automatically when power is supplied. A LM386 audio amp wasn't loud enough at a reasonable solar powered battery option. So it sat for a while. Found some more surplus, a little amp with speakers for Gameboy $3.95, loud enough, but runs on a 9 volt battery, has a 6 volt adapter socket. Haven't gotten around to doing the 6 volt supply, solar charger, dark-activated switch, LM317 for the 1.5 volts to run the MP3 player. Anyway, pretty well worked it out, just not a lot of spare time for that one. Was kind of hoping to get an AVR microcontroller to work as the dark activated switch, so I could put a long delay on it, and switch it off when the song was done. Could also use it to start the player, and save some soldering.