Multi-tunes Melody Integrated Circuits - HK221

Single-tone melody IC with 
   768 musical notes .
 HK221-2 includes 12
   children songs, HK221-3
   includes 16 children songs 
   available .
 Will be sequence song output
   when trigger pin is sequence
   touched .
 Trigger mode by one shot
    re-trigger type .  
 Maximum programming to 24
   songs for custom-made pro-
   ject programming .
 Can add a LED flash in output
   pin for sound indication .