Melting a hole through steel: The above image needs a little explanation! The Doc messed up his camera settings and under exposed the image. So I loaded it into Gimp and played with the curves [more…]
London’s tram network was equally loved and hated by its users and those inconvenienced by it. On the one hand, it was a reliable method of getting about however tracks were expensive to lay and [more…]
More information on laser speckle can be found here: Speckle pattern A Mirror Alignment Tool The most important part of constructing a ruby laser (or any laser with external mirrors) are getting the mirrors alligned [more…]
(a ruby rod lit by two bright blue LEDs. Due to the IR filter in my camera the pink colour is actually red. What you are seeing is the absorption of the blue light and the [more…]
Introduction For many years the Doc has had the desire to attempt the construction of a ruby laser. After six months of hard work, disappointment, late nights, lots of booze and a drained bank account [more…]
It was during an English lesson during the late 1970s – English lessons were never about spelling, grammar, creative writing, etymology, poetry or literature, always, always politics – when a short term supply teacher told [more…]
As a nipper, I was brought up in what was a fairly typical, English family. Mum, Dad, siblings and normal sorts of stuff. We were what I call typical Church of England. We all went [more…]
In my youth, I was an avid reader of Electronics Today International. Not only did it cover the more hefty electronic DIY projects but it also liked to look forward in terms of technology and [more…]
Whilst discussing the future liberation of Europe in 1942, Lord Louis Moutbatten discussed how fuel could be supplied to an invading army with the Minister in charge of the Petroleum Warfare Department, Geoffrey Lloyd. Previously, [more…]
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