"Bomb Detector" Is Simple And Effective Device That Is Capable Of Detecting Any Explosive Material. It Is Cost Effective, Portable, Reliable And Accurate.
Bomb Detector Is Useful For Security Checking. It Can Be Used To Detect Slightly Big Size Metallic Objects. It Uses A Sensing Coil. This Coil Is Kept Near Metallic Objects For Detection. Input Of Circuit Is A Weak Colpitt's R.f. Range Oscillator. Sensing Coil Forms Parts Of Tuned Oscillator. When Coil Is Brought Near Metallic Object; Magnetic Energy Is Absorbed And Oscillator Fails To Work. Finally Transistor Conducts And Buzzer Is Activated. It Uses A 9v Battery. After Connecting Battery,the 4.7k Preset Is Adjusted Until Circuit Stops Sounding.

COMPONENTS:
.Resistors
.Capacitors
.Transistors
.Diode(in 4148)
.Led
.Coil
.Buzzer
.9v battery
.PCB
.4.7k preset