HT-2880 pinout

HT-2880 contains 8 pre-programmed audio samples and was used in Casel Zapper (only KEY1 was utilized, as rifle sound).

          .---v---.
   GND -- |01   18| <> TEST3
   +5V -> |02   17| <> TEST2
 TEST1 <> |03   16| <- LEVEL HOLD
 AUDIO <- |04   15| -- OSC2 --[R=150k]-+
/AUDIO <- |05   14| -- OSC1 -----------+
  KEY8 -> |06   13| <- KEY1
  KEY7 -> |07   12| <- KEY2
  KEY6 -> |08   11| <- KEY3
  KEY5 -> |09   10| <- KEY4
          `-------`
           HT-2880

References

• What's goin on with the Casel Zapper? – forums