Have you ever wondered that the old fashion "ding dong" sound in your doorbell is boring?I have an solution for you!Customized doorbell that will play the sound on your choice!The tune is played in an old fashion Ring Tone Text Transfer Language (RTTTL).If the RTTTL doesn't ring a bell... It is the ...By: mkarvonen
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from Instructables: exploring - technology - robots http://ift.tt/1DGAVg0
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