Tester continuitate - ZL-1788 - ZIMBER-TOOLS

Continuity Tester Circuit, ZL-1788 - ZIMBER TOOLS
In this circuit, we will build a very simple continuity tester, actually one of the simplest that can be built.
A continuity tester is a device that checks for continuity along a device to see if the device is electrically intact.
If the device is electrically continuous, there are no breaks in the device and current can flow through it. It functions as a closed circuit.
If the device is not electrically continuous, there are breaks in the device and current cannot flow through it.
Electrical continuity can be checked on all types of devices such as alligator clips, all types of wires, and electrical connectors. It can basically be checked on any device that has low resistance.
In our circuit, we will build a simple LED circuit, leaving space so that we can detect the component we want to check for continuity. If the device is continuous, then the LED will light up. If the device is not continuous, the LED will not light up.
This is probably the simplest continuity tester that can be built.