Limit temperature music told circuit with TL431

Published:2011/3/23 1:13:00 Author:Jessie | Keyword: limit temperature, music told | From:SeekIC

Circuit as shown, it is composed by temperature control threshold switch circuit, SCR trigger circuit and music sound circuit, etc. IC1(TL431) is a high precision voltage stabilizer integrated circuit. IC2 use music IC HY-1(or HY-100), which adopts flake black paste soft encapsulation structure, and it has a famous song reservoir on the chip. RTis anegative temperature coefficient thermistors, under normal temperature,its value is43k Ω.



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