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Topic: Music book thing (Read 2 times) previous topic - next topic

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hi all
Sorry for the bad heading for the topic..  :) I couldnt think of anything else...  :D
I always wanted to know how the books (Photo albums or so) created some sort of sound(I mean some music with peizo or so ) when opened. Any circuit on how this is implemented?? Or atleast anyone know what it is called as or so (I couldnt find the name hence the heading  :smiley-mr-green: ) I mean stuff similiar music box. How is this implemented in book binding or so..
Hope you Guys understood what I am trying to say :)

StoneSizzerPaper

Hi. when the book is opned, the power to the circuit is connecterd and current is flowing trough the circuit makeing the chip run the music progam, and may stop playing when the program get to the end.

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when the book is opned, the power to the circuit is connecterd and current is flowing trough the circuit makeing the chip run the music progam


Yeah I knew that. Any circuits to do it? I saw some book with this feature some 10-12yrs back. Dont have the book with me to check the wiring... The circuit should be very small right to fit inside a book. and what about the power source. Anyone here has such a book to chk it out? 

CrossRoads

I would think any atmega with some memory could do it - play a simple tune from memory, switch contact to start it off. Little battery to power it, piezo to make the sound. Open one up, bet you find bare die with black gook over it, not even packaged. Cards can be had cheaply at drugstores.
Designing & building electrical circuits for over 25 years. Check out the ATMega1284P based Bobuino and other '328P & '1284P creations & offerings at  www.crossroadsfencing.com/BobuinoRev17.
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I would think any atmega with some memory could do it - play a simple tune from memory, switch contact to start it off. Little battery to power it, piezo to make the sound. Open one up, bet you find bare die with black gook over it, not even packaged. Cards can be had cheaply at drugstores.


Atmega probably is expensive for this.. I meant anyone really knows to do this cheaply. Anyways its not for me to implement... just for knowledge sake of it... BTW what is this bare die and the black thing? I have seen it many circuits..

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