wireless power transfer using IC555

Circuit Design:

Transmitter Circuit:

1. 555 Timer Astable Mode:
   • Connect the 555 timer in astable mode.
   • Connect the VCC pin (pin 8) to the positive supply voltage (e.g., 9V).
   • Connect the GND pin (pin 1) to the ground (0V).
   • Connect the Trigger (pin 2) and Threshold (pin 6) pins together.
   • Connect a resistor (e.g., 10kΩ) between the Trigger/Threshold pins and the Discharge (pin 7) pin.
   • Connect a capacitor (e.g., 10μF) from the junction of the Trigger/Threshold pins to the ground.
2. Transistor Driver:
   • Connect the Output (pin 3) of the 555 timer to the base of an NPN transistor (e.g., 2N3904).
   • Connect the emitter of the transistor to the ground.
   • Connect the collector of the transistor to the resonant coil of the transmitter.
3. LED Indicator (optional):
   • Connect an LED with a current-limiting resistor (e.g., 330Ω) from the collector of the transistor to the ground for visual indication.

Receiver Circuit:

1. Coil and Diode:
   • Place a resonant coil at the receiver side.
   • Connect a diode (e.g., 1N4148) in series with the coil.
2. Filtering Capacitor:
   • Connect a capacitor (e.g., 100nF) in parallel with the diode.
3. Load (Optional):
   • Connect a load (e.g., an LED with a current-limiting resistor) across the capacitor to demonstrate the wireless power transfer.

Working Principle:

• The transmitter circuit generates an oscillating signal using the 555 timer in astable mode.
• The transistor amplifies the signal and drives the resonant coil, creating a magnetic field.
• The resonant coil at the receiver captures the magnetic field, and the diode rectifies the induced current.
• The filtering capacitor smoothens the rectified waveform, and the load (optional) utilizes the wireless power transferred.