How to Make LED Polarity Tester Circuit | Check Positive & Negative Wire Easily

Описание: LED Polarity Tester 🔋
Find Positive & Negative Wire Instantly ✅
Simple DIY Circuit Using 1N4007 & LEDs 💡

📝 📄 Description:

In this video, learn how to make a simple LED polarity tester circuit using 1N4007 diodes, 1K resistor, and two LEDs.
This tester helps you easily identify positive (+) and negative (–) wires in any DC circuit.
When connected correctly, the green LED lights up for the right polarity, and the red LED shows wrong connection.

🔹 Components Used:
2x LEDs (Red & Green)
2x 1N4007 Diodes
1x 1KΩ Resistor
Connecting Wires


Perfect for beginners, DIY electronics lovers, and anyone who wants to test DC polarity safely.

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