Last Updated on December 21, 2022 by Mohamed Hagag
Connection type:
alarm whistle : SEL1=NC SEL2=NC
fire alarm : SEL1=1 SEL2=NC
Ambulance voice : SEL1=0 SEL2=NC
Machine guns sound: SEL1=x SEL2=1
NC:Dangling inputs
1:VCC
0:GND
