⚡ The Problem: Reverse Voltage Can Kill Your LEDs

LEDs are polarity-sensitive—they only work when connected the right way. If you accidentally reverse the voltage (say, during prototyping or wiring mistakes), the LED can burn out instantly. This is especially frustrating when using expensive or hard-to-replace LED modules.

🛠️ The Solution: Simple Reverse Voltage Protection

The fix is simple and cost-effective: add a diode in reverse bias across the LED or use a Schottky diode in series. This blocks current from flowing the wrong way.
Another option: use a P-channel MOSFET reverse polarity protection circuit for higher power setups.

🔌 Practical Example: Fixing a DIY LED Lamp

You’re building a USB-powered LED desk lamp. You accidentally connect the wires backward—boom, LED gone.
Solution: Add a 1N5819 Schottky diode in series with the positive line. It has low forward voltage drop (~0.3V) and blocks reverse current flow, saving your LED.

🔢 Sample Calculation: Power Loss Check

Let’s say your LED draws 300mA.

With a 0.3V drop across a Schottky diode:

P = V × I = 0.3V × 0.3A = 0.09W

This tiny power loss is worth the protection it offers.

🧰 Product Suggestion: Made in India Components

Protect your circuits with Schottky diodes and P-channel MOSFETs—affordable, reliable, and Made in India.

🛒 Shop now at SmartXProKits.in
Support our work and India’s innovation—buy from our Make in India site!