Welcome to the Wireless Power Project!

Hello Makers, welcome to another DIY tutorial by Akshay Project! Today, we are going to learn how to make a Simple Wireless Power Transmission circuit at home. This project works on the principle of inductive coupling and can transfer electrical energy from one copper coil to another without any physical wires.

​It is a fantastic and easy electronics project for beginners, science fairs, or just to understand how wireless chargers work

Components and Tools Required

1. 1x NPN Transistor (2N2222, BD139, or TIP31C)
2. ​1x 1k Ohm Resistor (1/4 Watt)
3. ​1x LED (Any color, 5mm or 3mm)
4. ​Insulated Copper Wire (27 AWG or 28 AWG works best)
5. ​1.5V or 3.7V Battery (AA or 18650 Lithium-ion cell)

Tools:

1. ​Soldering Iron & Solder Wire
2. ​Wire Stripper/Sandpaper (to remove copper wire insulation)

The most important part of wireless power transfer is the coils. We need to make two separate coils:

The Receiver Coil:

Take a cylindrical object (like a PVC pipe or a battery) with a diameter of about 1.5 to 2 inches. Wrap the copper wire around it for about 30 turns. Leave a few inches of wire at both ends, cut it, and slide the coil off. Secure it with tape.

The Transmitter Coil (Center-Tapped):

Using the same cylindrical object, wrap the copper wire 15 times. Then, pull out a small loop of wire (this is our center tap) and continue wrapping another 15 turns in the same direction. Secure this coil with tape as well. You should now have three ends coming out of this coil.

​Pro Tip: Don't forget to use sandpaper to remove the enamel coating from the tips of all the wires before soldering!

Now, let's assemble the electronics.

(Yahan apna clear circuit diagram/schematic image zaroor upload karein)

Receiver Connections:

Simply solder the two ends of the Receiver Coil to the two legs of your LED. (Polarity doesn't matter here because it receives high-frequency alternating current).

Transmitter Connections:

1. ​Solder one end of the Transmitter Coil to the Collector pin of the transistor.
2. ​Solder the 1k Resistor to the Base pin of the transistor.
3. ​Solder the other end of the Transmitter Coil to the other end of the 1k Resistor.
4. ​The center-tap wire of the Transmitter Coil will connect to the Positive (+) terminal of your battery.
5. ​Solder the Emitter pin of the transistor to the Negative (-) terminal of the battery.

Connect your battery to the transmitter circuit. Now, bring the Receiver Coil close to the Transmitter Coil (about 1 to 2 inches away). You will see the LED light up magically without any physical connection!

​As you move the receiver coil further away, the brightness of the LED will decrease. This demonstrates how magnetic fields transfer energy through the air.

​If you enjoyed this project, don't forget to subscribe to the YouTube channel for more awesome DIY electronics and RC builds. Happy Making!