what are the principle of the 4017 ic on music box?
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To get full information or details of working principle of music box using 555 timer and 4017 ic please have a look on the pages
http://instructablesid/Music-Box-Circuit-from-555-timer-circuitscom/
if you again feel trouble on working principle of music box using 555 timer and 4017 ic please reply in that page and ask specific fields in working principle of music box using 555 timer and 4017 ic