Lance Turner’s regular ReNew column on useful websites
Almost everyone at one time or another wants to know how to complete a practical task, be it fixing a bike tyre or cooking a particular dish for the family get-together.
Wikihow is touted as the how-to manual that you can edit. Just like other wikis, anyone can update and improve information in articles on the site, view all previous versions of each article or start new articles.
Many of the articles have videos attached, as well as a list of tips and warnings, plus related articles and even a list of suggested articles that need writing.
Topics on the site are wide and varied, with categories including arts and entertainment, cars and vehicles, computers and electronics, food and entertaining, health, hobbies and crafts, travel, relationships, pets and animals, business and finance, holidays, and just about anything else you might want to know how to do.
There’s some great articles on the site, including how to save a laptop from liquid damage, using a multimeter, assorted articles on various aspects of bike maintenance (why pay the bike shop to do simple jobs!), make a flaxseed smoothie, how to make and use a solar oven and many others.
If you want to learn more practical skills, this is a good place to start. There’s not always a lot of detail but each article is a guide to get you started.
Electrical and electronic circuits surround us in our everyday lives, but very few people know anything about them. If you want to be a DIY-er and do your own DC wiring or make your own useful electrical or electronic devices then you are going to need a grounding in electrical and electronic theory.
The All About Circuits website aims to give you exactly that. It starts off as simple as possible, explaining basic AC and DC theory covering concepts such as conductors, insulators, and electron flow, voltage and current, resistance and various other concepts.
It then continues on to AC theory, including phases, waveforms, complex numbers, inductance, capacitance, filters, transformers, multiple phase signals, power factor, metering and more.
It then moves to detailed descriptions of semiconductors including all the common types like diodes, bipolar transistors, FETs and the like. Amplifiers and motor drives are covered, although the inverter section was empty when we last checked.
Next comes digital electronics including number systems, logic gates, ladder logic, boolean algebra, counters, shift registers, analogue-to-digital and digital-to-analogue conversion and others.
There’s a very useful reference section, a detailed experiments section where you can put your knowledge to good use, and even a series of worksheets so you can check your memory. There’s even a heap of videos for those who find them to be a better learning tool, plus a very active forum section.
All up, this is an excellent place to start if you want to learn about electricity and circuits in a practical way.This article is from ReNew 117
This entry was posted on Friday, September 16th, 2011 at 3:45 pm