WIRELESS POWER TRANSMISSION

Components Needed:

1. 2.2kΩ Resistor
2. 2N2222A NPN Transistor
3. A Switch
4. Copper Wire
5. Aluminum Foil
6. Battery (e.g., 9V battery)

Circuit Explanation and Connections:

Transmitter Circuit:

1. Transistor (2N2222A):
   • The 2N2222A transistor will act as a switch to control the power flow through the circuit. It has three leads: collector (C), base (B), and emitter (E).
   • Connect the collector (C) of the transistor to one end of the copper wire.
   • Connect the other end of the copper wire to the positive terminal of the battery (e.g., 9V battery).
2. Resistor (2.2kΩ):
   • Connect one leg of the 2.2kΩ resistor to the base (B) of the transistor.
   • Connect the other leg of the resistor to the negative terminal of the battery (ground).
3. Aluminum Foil:
   • Place a piece of aluminum foil near the emitter (E) of the transistor. This foil acts as the “antenna” or radiator for the wireless transmission of power.
4. Battery:
   • Connect the negative terminal of the battery to ground (common ground with the transistor and resistor).

Receiver Circuit (not detailed here, but typically involves a coil to receive the transmitted power):

• On the receiving side, you would typically have another coil or a setup to receive the power transmitted wirelessly from the aluminum foil antenna. This setup could involve another transistor and a load (like an LED) that gets powered wirelessly.

How It Works:

• When the circuit is powered on, the 2N2222A transistor acts as a switch controlled by the base current (through the 2.2kΩ resistor).
• The transistor allows current to flow through the copper wire, creating a changing magnetic field around the wire.
• This changing magnetic field induces a current in the nearby aluminum foil (acting as an antenna), generating a voltage that can be used to power a load (on the receiver side).