Crack the Code Components Kit Only

Jargon buster

Plain-language definitions for the technical terms used above.

LDR

A light-dependent resistor is a component whose resistance changes with light level. It is useful for simple brightness sensing, and an ADC board is needed to turn its changing analogue voltage into numbers a microcontroller or computer can read.

LED

A light-emitting diode is a small electronic component that lights up when current flows through it in the correct direction. In this kit, LEDs create the flashing effect, so polarity and correct soldering matter for the project to work.

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.