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door bell ic

Abstract: musical bell HK522 door bell musical door bell musical door bell circuit IC 2901 musical door bell ic list ding dong door bell DING DONG BELL
Contextual Info: HK522 Page 2/1 DOOR BELL IC 3 KIND DOOR BELL SOUNDS Features ＊Built 256 musical notes ROM memory with dual tone musical effect in IC body ＊3 independence song to be playing from 3 trigger pins ( TG1 , TG2 , TG3 ) ＊1 sequence trigger ( SQ pin ) for 3 songs output

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