So, you don't have a multimeter? You can make this continuity tester at home.
Circuit continuity tester is a device that indicate current can flow in
electronic circuit. This equipment can detect whether there is a break in wire or components.
This tester is using 9V DC supply. It can over-voltage your electronic circuit and electronic components.
Step 1: Materials
Here are what you need to make this tester:
- Active buzzer
- Battery & Connector Cap
- Wire Connector
- Copper Wire
- Plastic box
- Small Markers
Step 2: The Circuit
In this step, we need to create the circuit first. The circuit is simple, connect battery with active buzzer. Connect wires of the same color.
Then test the circuit whether working or not by connecting cable ends.
If it is buzzing, then it works.
If it is not buzzing, then something wrong with the circuit. Check the cables and components.
After that, place the circuit in plastic box. Glue the battery and other components inside the box.
Step 3: Connect With Long Cable
Create a hole at side of plastic box, with solder or cutter.
Put the cable in the box through the hole.
Connect the inserted cable with tester circuit cable ends.
Step 4: Create the Probes
To create the probes, we need 2 marker tube cases and copper wire.
First, remove all parts inside markers. Put the copper wires into marker tube cases.
Then connect copper wires with tester cables.
Step 5: Test the Tester
It's time to test the tester.
Prepare a component like resistor, capacitor, motor, etc. Place the probes to both component ends.
If the tester is not buzzing, then try to swap the probes to other end.
If the tester is still not buzzing, then the component is broken.