Technology

Articles, Projects, Tutorials

Here you will find all of my posts to do with technology. Mainly articles, tutorials and projects on computers and electronics.

Web Development Tutorial Part 1 – HTML, CSS and JavaScript

Posted September 14th, 2014 by

So beginning (hopefully) a series of tutorials on web development, we look at an overview of how websites are constructed and what interaction occurs between a web browser and a web server.

Basically, the world wide web is based on a client-server architecture, where the client (the web browser) requests data from a server (the website) which, in turn, sends a response containing the data.

Diagram showing client-server architecture

Of course, this is a greatly simplified explanation of what’s going on (it’s not really as direct as it appears here), but such an understanding will suffice for developing most websites.

We will start by examining client-side web development. That is, web development designed for the browser.

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Dual Power Supply with 48V Phantom Power Output

Posted December 27th, 2013 by

Presented is another power supply schematic, but this time using adjustable regulators instead of the normal 78xx and 79xx series fixed voltage regulators. These typically provide lower noise output, and the output voltages can be changed by altering the values of resistors, rather than replacing the three-terminal regulators (which can be quite cumbersome).

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Hi-Z to Balanced Line Level Converter

Posted December 16th, 2013 by

Presented is a schematic for a simple circuit with a high-impedance, unbalanced input suitable for an electric (or bass) guitar or some sort of piezo pickup, and balanced, line-level output suitable for use with an audio interface with an appropriate input.

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Regulated Dual Power Supply

Posted December 1st, 2013 by

The first project I’ve decided to publish here is a simple dual power supply, which I use for powering audio circuits requiring such a supply. It’s pretty much a standard design, and should be suitable for low power devices (ie. don’t use it for a power amplifier or a toaster or anything).

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Explaining RAID4 & RAID5

Posted March 26th, 2012 by

So after months of nothing, I finally come back to with website and I see 84 spam comments… I really should get some sort of spam filter, but I guess since nobody ever really comments much anyways (0 in total, I believe) I’ll just go ahead and delete all of the comments.

And now to the actual post…

Hard drives are a fragile device indeed; dropping them causes them to break, shaking them causes them to break, magnets can cause them to break and time can cause them to break. It’s interesting how these devices that we rely so heavily on with our data are actually constantly failing at random intervals.

So why do hard drives break, anyway?

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