A diode is a semiconductor device and one of the most common devices in electronics
Light emitting diodes are devices that can convert electrical energy into light energy,
An inductor is a device capable of storing electromagnetic energy, consisting of a coil and a magnetic core.
Inductor whistling refers to the high-frequency oscillation sound that occurs when using inductors in a circuit
When there is resonance between inductors and capacitors in a circuit, it can cause high-frequency oscillations, resulting in whistling sounds.
The varactor diode (Variable Capacitance Diode), also known as a variable capacitor diode,
