Fire alarm using basic logic gates
1
7
14
8
1
7
14
8
Alarm
A
C
+ -
Extinguisher
A1
C1
+ -
A (Smoke Sensor)
B (Heat Sensor)
Check Connections
Start Simulation
Reset Connections
Instructions
Components
✕
Fill the truth table and click on
'CHECK'
button.
Click on the components button to place the component.
Make connections as per the circuit diagram.
Fig. 1 Circuit diagram of fire alarm using logic gate ICs.
Fig. 2 Pin diagram of IC-7408.
Fig. 3 Pin diagram of IC-7432.
Click on '
Check Connections
' button. If connections are right, the '
Start Simulation
' button will become active. Click on it to start simulation.
Click on the toggle switches '
A
' and '
B
' to perform simulation.
✕
Breadboard
5V DC Supply
Digital Switches
IC-7432
IC-7408
LED
TRUTH TABLE
Components button will remain inactive until Truth-Table is filled correctly.
INPUTS A B
Alarm
Extinguisher
0 0
0 1
1 0
1 1
CHECK
RESET