A simple melody generator/music/tone/audio/sound generator circuit using IC UM66,which can be used for telephone ringer circuit and calling bell circuits.
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=== = = = = = = = == = = = == = = = == = =
== = = = = == = = = = = = = == = = = = = ==
★★ Please like and subscribe ★★
https://www.youtube.com/channel/UCNqYc-ojesF6AbXwiWdZbeg?sub_confirmation=1
=== = = = = = = = == = = = == = = = == = =
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