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:: EPE Chat Zone ­:: ­Radio Bygones Message Board :: » EPE Forum Archives 2007-2009 » Archive through 03 June, 2007 » Help « Previous Next »

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graham84
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Username: graham84

Post Number: 1
Registered: 05-2007

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Posted on Friday, 25 May, 2007 - 11:32 pm:   Edit Post Delete Post Print Post    Move Post (Moderator/Admin Only)

Hello there, sorry to bother you all, i'm new to these forums so excuse my lack of knowledge. I'm hoping to create a small music making device much like the ones you find in birthday cards etc, when you open them up they play a tune. Anyone got any ideas as to how to do this? Any help would be greatly appreciated. I basically want to make something along the lines of this - http://www.kitsrus.com/jpg/card2.jpg

Thanks in Advance
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cpemma
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Username: cpemma

Post Number: 38
Registered: 02-2006

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Posted on Saturday, 26 May, 2007 - 12:31 am:   Edit Post Delete Post Print Post    Move Post (Moderator/Admin Only)

To reproduce the effect you could program a PIC to play the right notes in sequence, but the end result would be far bulkier and far more expensive than these ready-made modules.

UK source here: http://www.rapidonline.com/productinfo.aspx?&tier1=Educational+Products&tier2=Projects+%26+Robotics&tier3=Sound%2c+Music+%26+Light+Modules&tier4=Musical+modules +for+greetings+cards&moduleno=34060&catref=13-0614

Also available in IC form, you should find similar in the US

http://www.rapidonline.com/productinfo.aspx?tier1=Electronic+Components&tier2=Integrated+Circuits&tier3=Timers+%26+Signal+Gens.&tier4=Three-melody+generator+ICs&moduleno=77740

(Message edited by cpemma on 26 May, 2007)
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john_becker
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Username: john_becker

Post Number: 1393
Registered: 05-2005

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Posted on Saturday, 26 May, 2007 - 01:27 am:   Edit Post Delete Post Print Post    Move Post (Moderator/Admin Only)

Although I'm well into PICS, I dont think they're the answer you need. The chips in those cards will have been made specially for them. Everything in the one tiny chip I expect, including power source and switch somehow.

I've never taken one apart - has anyone, and knows just what goes on?

J
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boris
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Username: boris

Post Number: 183
Registered: 05-2005


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Posted on Saturday, 26 May, 2007 - 05:21 am:   Edit Post Delete Post Print Post    Move Post (Moderator/Admin Only)

Use a PICAXE. Dead easy. 8-pin DIL chip and a piezo disk. Programming is in BASIC. Just use the SOUND command, followed by a list of notes and durations.
"What's red and invisible?"
"No tomatoes"
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bgrabowski
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Posted on Saturday, 26 May, 2007 - 01:20 pm:   Edit Post Delete Post Print Post    Move Post (Moderator/Admin Only)

An even better command for picaxe 08M is TUNE. You can import mono mobile phone ringtones.
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cpemma
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Username: cpemma

Post Number: 39
Registered: 02-2006

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Posted on Saturday, 26 May, 2007 - 05:20 pm:   Edit Post Delete Post Print Post    Move Post (Moderator/Admin Only)

"Everything in the one tiny chip I expect, including power source and switch somehow."

See the picture, John. Switch, battery and piezo speaker are external. I've a slightly more powerful design with an external (2-transistor) amplifier section but all the real work is done under the black blob. These do 128 notes, the Raid DIL one "256 Notes dual tone".
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obiwan
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Username: obiwan

Post Number: 1736
Registered: 12-2005

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Posted on Monday, 28 May, 2007 - 11:26 pm:   Edit Post Delete Post Print Post    Move Post (Moderator/Admin Only)

They do have tiny chips that play music, TO92, power it up and it will play a "specific" tune, like happy birthday or something.

I think allelectronics.com had some. Not a wide choice though, only two.

But that is what they use in those cards, they do not use a PIC.

But if you want something you can program for any tune, that would be the PIC or something similar.
Do Not Hit The Fly That Lands On The Tigers Head.

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