🧯 The Problem: Reverse Voltage Kills LEDs

LEDs are polarity-sensitive—apply voltage in reverse, and you risk destroying them instantly. This often happens during prototyping or accidental wiring mistakes.

🔧 The Solution: Use a Parallel Diode

The simplest protection method is placing a rectifier diode (e.g., 1N4007) in reverse parallel across the LED. When reverse voltage is applied, the diode conducts, clamping the voltage and saving your LED.

💡 Real-World Example: DIY Ambient Lamp

A hobbyist in Pune built a decorative LED lamp powered by a 12V wall adapter. One day, the polarity got reversed and half the LEDs blew out. After adding a 1N4007 diode across each LED strip, no more issues—even if polarity is accidentally reversed.

🧮 Sample Calculation: Diode Power Handling

Say your adapter can source 500 mA.

The diode should safely carry that in case of reverse connection:

P = V × I = 12V × 0.5A = 6W

So, use a diode rated for at least 1A and 50V.

The 1N4007 is a perfect low-cost choice!

🛒 Product Tie-in

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