This project shows how Wireless Power Transmission works using a simple idea called electromagnetic induction. This is the same technology that powers wireless charging pads for smartphones today.
The project is built around two main stages: a Transmitting Circuit and a Receiving Circuit.
Components Required: (Affiliated Links)
- Copper wire 30AWG
- BC 547/2N2222 transistor ►https://amzn.to/3yhyQtS
- 1 KΩ Resistor ►https://amzn.to/3opTa80
- LED (any color) ►https://amzn.to/3byHJW3
- 9V Battery & Clip ►https://amzn.to/3uZIak0
1. The Transmitting Circuit (The Power Source)
This part creates the energy that will be sent wirelessly:
- Transmitting Coil: A tightly wound coil of insulated copper wire. It makes the magnetic field.
- Transistor (like 2N2222): Works like a fast switch that turns the current on and off quickly, helping to create a changing magnetic field.
- Resistor: Helps to control the transistor properly.
- Battery: Provides power to the circuit.
2. The Receiving Circuit (The Load)
This part catches the energy sent by the transmitter:
- Receiving Coil: Another coil of copper wire that picks up the magnetic energy.
- LED (Light Emitting Diode): Lights up to show that power has been received and transferred.
How the Wireless Transmission Works
Power moves from the transmitter to the receiver based on how magnetic fields change, using a rule called Faraday’s Law.
- The transmitter sends power by quickly turning the current on and off through its coil. This creates a strong, changing magnetic field around it.
- When the receiver coil is close to this changing magnetic field, it produces electricity in the coil by “catching” the magnetic energy.
- This electricity makes the LED light up, showing that energy moved without any wires connecting the two parts.
The distance and position of the coils matter a lot. The further apart they are, the weaker the power transfer gets. This way of sending power is best for short distances, like in phone charging pads.
This project is a great first step to learn how electrical energy can be turned into a magnetic field and then back into electricity again.
Watch the full video tutorial here: How to make a Simple and Easy Wireless Power Transmission at Home | DIY Wireless Power Transmission