Free delivery on orders above Rs 900 | For Enquiry Call/Whatsapp +91 7276757409

Cart

Your Cart is Empty

Back To Shop

Cart

Your Cart is Empty

Back To Shop

Reverse Polarity Protection for 5V Circuits – A Simple Fix for Electronics Projects

Reverse Polarity Protection

When working with 5V circuits, one of the most common issues faced by hobbyists and engineers is reverse polarity. This occurs when the power supply is connected incorrectly—reversing the positive and negative leads can damage sensitive components. Fortunately, fixing this problem is relatively easy with a simple protection mechanism.

 

The Problem and Solution:

 

In most circuits, the positive terminal of the power supply should be connected to the Vcc or positive rail, and the negative terminal to ground. However, if the connections are accidentally swapped, it can lead to circuit failure. The solution is to use diodes or MOSFETs in the circuit to protect against reverse polarity. These components ensure that current flows in only the correct direction, preventing damage.

 

Practical Example:

 

Imagine you’re working on a 5V Arduino-based project and accidentally plug the power supply in backward. Without reverse polarity protection, the board could burn out. By adding a diode in series with the power supply input, you can block the reverse current, ensuring the circuit still works even if the polarity is swapped.

 

Sample Calculation:

 

If you’re using a 1N4007 diode, which has a forward voltage drop of approximately 0.7V, you’ll need to account for this when choosing your power supply voltage.

For a 5V circuit, ensure your supply can provide at least 5.7V to compensate for the voltage drop across the diode.

 

Products You Need:


For reverse polarity protection, you’ll need quality MOSFETs and diodes—components that you can trust. Shop now at SmartXProKits and SmartXProKits for your Made in India components.

Cart

Your Cart is Empty

Back To Shop
GET DISCOUNT CODE

It will take just few seconds to claim 7% Discount, After Submitting check Email for Coupon code.

    X
    GET DISCOUNT CODE