Little Bird 45 in 1 sensor kit for Arduino

Jargon buster

Plain-language definitions for the technical terms used above.

DS1302

A real-time clock chip used to keep track of time and date, often with a small backup battery. It matters for data logging, timers, and classroom projects that need timekeeping even when the main controller is reset or turned off.

encoder

An encoder is a sensor that converts the rotation or position of a shaft, knob or dial into electrical signals, reporting movement as incremental steps and direction, or as an absolute position. It is used to track how far something has turned, which matters for precise positioning, speed control, repeatable movement, or using a rotary knob as an input.

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.

MP1584EN

The MP1584EN is a small switching (buck) regulator chip commonly used in adjustable step-down power modules, where it efficiently converts a higher DC voltage to a lower one.

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.

Relay module

A relay module uses an electrically controlled switch to let a low-power microcontroller control a separate circuit. It matters when switching devices that need different voltages or more current than a microcontroller pin can safely handle.

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.

SMD

SMD means surface-mount device, a component style designed to be soldered directly onto the surface of a circuit board rather than through holes. SMD parts are compact and mounted flat on the board, which suits smaller and mass-produced designs.

Ultrasonic module

An ultrasonic module measures distance by sending out high-frequency sound pulses and timing their echo. It is commonly used for obstacle detection and simple range-finding projects, but it needs a clear path to the target.