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Small Musical Components Answered

I've got an idea in my head, but there's one part that may unravel the whole thing so I thought there would be no better place to ask than here! I'm wondering if there are any tiny devices that will play a given song (on repeat likely) when power is supplied to the device? If you've ever seen one of those birthday cards that plays music when they open then you have a pretty good idea of what I mean. I'm looking for something that would fit inside of an area about half an inch deep by an inch across. Something like you'd see inside of a music box (except scaled down) - does this sort of thing exist? Much thanks! - JM

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You can get versions of these cards that you record yourseld also.

Oh, wow. That's pretty spot on, whatsisface - many thanks, (especially for the googlin')! The only sort of electronics familiar with are BEAM robotics, so I really like the idea of using the melody chip. But... I need to program a specific song into it so I suppose the PICAXE is probably the most viable alternative. I know absolutely nothing about microcontrollers, though. Would I basically just be "uploading" the song onto the controller?

Like with whatsisface's idea of the melody chip could you take one out of a musical card and reprogram it by chance. I have kno idea how you would if the cards even used that type.

I've heard of something called a "Melody chip". They look like transistors, and as far as I can tell they're designed with this exact purpose. I don't know much more, google might.