High-voltage resonant transformer system demonstrating wireless power transmission through electromagnetic induction. Features hand-wound secondary coils, resonant LC circuits, and MOSFET-driven primary coils in both full-size and miniature portable configurations.
Invented by Nikola Tesla in 1891, the Tesla coil is a resonant transformer circuit that produces high-voltage, high-frequency alternating current electricity. It demonstrates fundamental principles of electromagnetic resonance, wireless power transmission, and high-frequency AC circuits.
A primary coil driven by switching electronics creates a magnetic field. The secondary coil, resonantly tuned to the same frequency, steps up the voltage to extremely high levels through electromagnetic induction. The result is spectacular electrical arcs and wireless power transmission capabilities.
Both builds successfully demonstrate wireless power transmission by lighting fluorescent bulbs without physical connection. This showcases Tesla's vision of wireless energy transfer and the practical applications of resonant inductive coupling.
The secondary coil is hand-wound with hundreds to thousands of turns of fine copper wire on a cylindrical former. Precise winding technique ensures even spacing, proper inductance, and resonant frequency matching with the primary circuit.
The primary LC tank circuit (inductors + capacitors) is carefully tuned to match the resonant frequency of the secondary coil. This resonance allows for efficient energy transfer and maximum voltage step-up through electromagnetic coupling.
Both prototypes successfully demonstrate wireless power transmission by lighting CFL and fluorescent bulbs without any physical electrical connection. This validates Tesla's pioneering work in wireless energy transmission and resonant inductive coupling.
When the primary and secondary circuits are tuned to the same resonant frequency, energy oscillates efficiently between them. This is similar to how a swing reaches maximum height when pushed at its natural frequency.
The turns ratio between primary (few turns) and secondary (many turns) creates massive voltage step-up through mutual inductance. Where the primary might use 12V, the secondary can produce thousands of volts or more.
The high-frequency, high-voltage output creates strong electromagnetic fields that extend into the surrounding space. These fields can wirelessly couple to nearby conductors, enabling wireless power transfer to compatible loads.
Tesla coils produce extremely high voltages and strong electromagnetic fields that can cause serious injury or death. They also emit radio frequency interference that can affect electronic devices. This documentation is for educational purposes only. Do not attempt to build or operate a Tesla coil without proper training in high-voltage safety, RF safety protocols, appropriate safety equipment, and supervision from qualified professionals. Always maintain safe distances, use proper grounding, and ensure adequate electromagnetic shielding.