# Resources

## Understanding Ceramic Disc Capacitor Values

Ceramic disc capacitors markings are a two or three digit value, this tutorial explains how to use the code to determine the capacitance in Farads.

## How To Use Capacitors

A guide on using capacitors, their circuit symbol, values & charging through a resistor.

## 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.

## How to Identify Components

A quick reference guide to identifying & orientating components.

## Understanding Component Uses & Symbols

Learn about resistors, capacitors, diodes & transistors. In this guide find out what they do, how they work and what the circuit symbol is to represent them.

## How to Make a Basic E-Textile LED Circuit

Learn how to create a basic E-Textile LED circuit in our easy to follow tutorial.

## Soldering Equipment Explained

In this Kitronik University resource we're going to explain the various types of soldering equipment. Join Kevin as he explains the various types of soldering equipment in the video, or see further down for a text version of the resource.

## How to clean and maintain your soldering iron - Kitronik University

Over time soldering iron tips accumulate old solder and other debris, this guide shows how best to clean the tip with a damp sponge or tip tinner / cleaner. There is an accompanying video tutorial, the tip cleaning guide is just part of wider collection of tutorials on using soldering irons.