Voltage booster using Radio 📻 Frequency. #experiment #diyprojects #science

Boost voltage using RF frequency. In this video, I demonstrate a simple one-transistor circuit powered by a single 1.5 V battery. At first glance it looks like a basic voltage booster, but in reality this circuit works as a self-oscillating AM detector. The transistor and ferrite coil form a blocking oscillator, which generates high-frequency RF oscillations. These oscillations can fall in the medium-wave (MW) radio band depending on the coil, wiring, and stray capacitance. Because of this, the circuit unintentionally behaves like a small RF generator. The long connecting wires act as an antenna and pick up strong nearby AM broadcast signals. Inside the transistor, the base-emitter junction behaves like a diode and mixes the incoming broadcast signal with the locally generated RF oscillation. This process is known as autodyne (self-oscillating) detection. Due to this mixing and demodulation, audio signals appear at the collector of the transistor, and when an earphone is connected between the battery positive and the collector, the audio from a medium-wave radio station can be heard directly. This circuit is not a tuned radio receiver and does not provide good selectivity or sensitivity like a superheterodyne radio. It is an experimental demonstration showing how RF oscillation, detection, and audio recovery can occur using very few components and a low supply voltage. This project is intended for educational and experimental purposes only and does not involve free energy or signal amplification beyond basic inductive voltage boosting and RF mixing.