Hello Guys! I am back with the second part of my Short Circuit Detector Instructable. If you guys haven’t read it here is the link to my Short Circuit Detector (Part-1).

Let’s Continue…

Step 1: Fabricated Board

The image shows the fabricated PCB board from LionCircuits. The quality of the board is great and I received it in just 6 days.

Let’s starts with the assembly of this board.

Step 2: Components Assembled Board

The above image shows all components assembled on the PCB Board. I have used a 9 v battery for input supply, when the two wires are in contact the buzzer will make a sound and led will glow.

Step 3: Working

A simple electronics circuit can be built using a couple of transistors and few passive components, we can power up this circuit using 9 v battery or 9 v DC adapter. The circuit basically is an oscillator with a buzzer connected at its output. It will produce a particular audio tone depending upon the resistance of the circuit under test connected across its testing probes. Touch the two probes buzzer will make a sound and LED will glow.

Step 4: Final Working Setup

The above image shows the final working setup. After assembling the board, I mounted the PCB in a box and connected with +ve and – ve probes.

Step 5: Continuity Testing of PCB

The above image shows the continuity testing of the PCB. The left image shows that two wires are not in contact, the LED is not glowing and the buzzer is not making a sound. The right image shows the two wires are in contact, the LED is glowing and the buzzer is making a sound.