This is a simple burgular alarm.
To Set this alarm up connect X2 pin 7 and pin 8 to the sensor turn the 4th switch on s1 on and connect power. When the sensor is triggered the buzzer should go off.
Use the other pins on x1 to connect to other indicators to go off when the alarm is tripped pins 1&2, 3&4, and 5&6 are all pairs to connect to induvidual indicators. S1 is in the circuit to turn on or turn off what indicators you want to use.
Use the other pins on x2 to connect to other sensors to trigger the alarm. Pins 1&2, 3&4, 5&6, and 7&8 are pairs to hook to each sensor.
How it works
The alarm is triggered when the sensor closes the circuit which turns on the LED and the buzzer (if the buzzer is turned on). The resistors are there to limit the current going to the LEDs, so they don't burn out. The Diodes are there so that only one LED goes on at a time. If they were not there all the LEDs would turn on when one sensor was tripped and then you wouldn't know what sensor was triggered.
