Power supplies (DC-DC converters), radio tuners, and the hum you hear from old transformers. 4. The Diode (The One-Way Valve) Function: To allow current to flow in only one direction.
A diode is a semiconductor sandwich (P-type and N-type silicon). On one side, it looks like an open highway; on the other, it looks like a brick wall. electrical components and their functions
Think of a capacitor as a very fast, very small rechargeable battery. It consists of two conductive plates separated by an insulator (dielectric). Voltage pushes electrons onto one plate; they want to jump to the other side but can't cross the gap. This creates a stored charge. Power supplies (DC-DC converters), radio tuners, and the
Ohm’s Law is the only equation you truly need to memorize. [ V = I \times R ] If you know two of these values, you can calculate the third. A 330Ω resistor with a 5V supply will pass roughly 15mA of current. 2. The Capacitor (The Reservoir) Function: To store electrical energy in an electric field . Unit: Farad (F) – usually microfarads (µF) or picofarads (pF). A diode is a semiconductor sandwich (P-type and
At the heart of every electronic device lies a simple truth: Our job as engineers and makers is to tell it how . We do this using the seven fundamental electrical components.
Inductors hate change. They resist sudden changes in current . If a capacitor is a water tank (pressure storage), an inductor is a heavy flywheel (flow storage). If you try to stop a flywheel instantly, it snaps the axle. Similarly, if you disconnect an inductor carrying current, it will generate a massive voltage spike to try to keep the current moving. (This is why relays have "flyback diodes"—to catch that spike.)
A transistor has three legs. A small amount of current/voltage on the "Base" (Gate) controls a large amount of current flowing between the "Collector" and "Emitter" (Drain and Source).