 ## What Is Solar Power – an Enlightening Guide

The sun provides a huge potential source of energy for our planet. Average solar energy falling on the planet is around 1300 W/m2. This is roughly ... ## What Are Electric Motors – A Brief Guide

Motors provide a clean way to convert electrical energy (such as from batteries) into mechanical energy (or movement.) This document explains what a motor is, a little of the theory about how it works, and shows some of the different types of motors. ## What Are Servos – A Brief Guide

Radio Control (RC) Servos are a simple way to provide electronically controlled movement for many projects. It does not refer to the more general, wide-ranging, description of a servo motor – that is a motor which has feedback control. ## How A Thermistor Works

A guide to understanding how a thermistor works. A thermistor is a component that has a resistance that changes with temperature. There are two types of thermistor. Those with a resistance that increase with temperature (Positive Temperature Coefficient – PTC) and those with a resistance that falls with temperature (Negative Temperature Coefficient – NTC). ## How A Darlington Pair Transistor Works

A Darlington pair is two transistors that act as a single transistor but with a much higher current gain, this tutorial provides an example circuit with explanation about how the part is used. ## How A Transistor Works

A transistor in its simplest form is an electronic switch. This tutorial explains how a small amount of current can be used to switch on or off a much larger amount of current. ## How Colour Changing LEDs Work

A colour changing LED contains a red, green and blue LED along with a small computer to drive them, but how do they work to produce different coloured light? Find out in this tutorial. ## How To Calculate Capacitors In Series And Parallel

Calculate the combined total capacitance of capacitors in parallel and series using the formula and explanations detailed in this tutorial. As well as explaining the formulas and maths involved there is also some tasks for you to test yourself for two and three capacitor networks. ## How to Calculate Resistors in Series and Parallel

Calculate the combined resistance of resistors in series or in parallel using the formulas and explanations described in this tutorial. As well as explaining the formulas and maths involved there is also some tasks for you to test yourself for two and three resistor networks. ## How To Calculate And Understand Resistor Values

The value of a resistor can be calculated using the colour bands on the resistors casing, find out what each colour means and how to read them with this tutorial. Resistor tolerances, a worked example, the resistor preferred value system and some tasks for you to try are also included. ## How an LDR (Light Dependent Resistor) Works

A light dependant resistor or LDR is a sensor that changes resistance as the light level changes, see example circuits and explanations in this tutorial. This tutorial also covers what an LDR looks like, the circuit symbol, typical resistances for different light levels and some example applications.