Electronics Components Basic Starter Kit

Jargon buster

Plain-language definitions for the technical terms used above.

1N4007

A common general-purpose rectifier diode rated for relatively high reverse voltage. It is often used in power supplies and protection circuits where speed is not critical.

LED

A light-emitting diode (LED) is a small electronic component that emits light when current flows through it in the correct direction. Because it only conducts one way, its polarity matters, and a through-hole LED must be soldered the correct way around to light up.

photocell

A light-sensitive component whose electrical resistance changes with the amount of light falling on it. It matters when choosing or using light sensors, automatic lights, or brightness-detecting circuits because its response speed, resistance range, and sensitivity affect how reliably it detects light levels.

potentiometer

A variable resistor usually turned with a knob or shaft to create an adjustable electrical signal. It is often used for inputs such as volume, brightness or position, so it helps beginners learn how a microcontroller reads changing values.

rectifier diode

A diode designed to let current flow mainly in one direction, often used to convert AC into DC or to protect circuits from reverse current. It matters because rectifier diodes are chosen for power handling rather than fast signal switching.

RGB

Short for red, green and blue, the three primary colours of light that are mixed in varying amounts to make a wide range of colours. In electronics RGB can refer to an LED or pixel that blends these three colours, or to a colour signal or interface that carries separate red, green and blue channels.