This circuit will activate or deactivate a siren by pressing the appropriate button on a handheld infra-red transmitter:
- #1 = Turn siren Off
- #2 = Turn siren On
It is advised to use a paper or mylar cone speaker of at least 1W. Do not use high quality speakers for home entertainment systems.
Circuit Voltage: 6 to 12 volts
Select the required channels using the jumper
Link A0 = Ch1,2
Link A1 = Ch3,4
No link = Ch5,6.
TRIANGLE WAVE ASTABLE:
Adjust the warble rate using VR1. Start with VR1 set at minimum, fully anti-clockwise.
Set Range 2 or 3 for audio frequencies. Adjust pitch using VR1