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Sound Effect IC HK625

* Built in 1 LED flash circuit for sound output indication 4 siren sounds to be playing from 4 independent trigger keys (TG1, TG2, TG3, TG4 pin). * LH pin: Trigger mode option by one shot with re-trigger type (LH pin open) or level hold type (LH pin connect to GND).      

Audio Controller IC HK723

* Built adjustable oscillator in IC body. * Built in power on reset and A/D & D/A circuit. * Built in 45K bits SRAM for delay control. * Adjustable delay time setting between 30 ms ~ 700 ms for Echo mode or Surround mode. * Lower operation current. * Application: VCD players, Karaoks, TVs

Doorbell IC HK522

* 3 kinds of door bell sounds. * Built 256 musical notes ROM memory with dual tone musical effect in IC body. * 3 independt songs to be playing from 3 trigger pins (TG1, TG2, TG3). * 1 sequence trigger (SQ pin) for 3 songs output when SQ pin had sequence triggered.     &nbs