Musical Greeting Card Circuit Diagram

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How To Hack An Audio Greeting Card | Musicworks magazine

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How to Make Your Own Musical Greeting Card

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How To Hack An Audio Greeting Card | Musicworks magazine

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Musical Greeting Card circuit using UM66 IC - Gadgetronicx

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Musical Greeting Card circuit using UM66 IC - Gadgetronicx

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DIY Paper Circuit Card : 6 Steps (with Pictures) - Instructables