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There are lots of online resources for DIY audio. Rather than making an exhaustive list, I've made a list of places where I have either bought stuff or learned stuff, or both.

DIY - Audio Related Resources

 

This is the project page for a USB to S/PDIF converter.

DIY - USB to S/PDIF converter

 

DIY - Tube Buffered Passive Preamp

DIY - Tube Buffered Passive Preamp

 

One of the most common questions that shows up on DIY forums is what coupling caps to use in a particular application. For those who do not know, coupling caps are used on the ouput (or input) of a circuit to block DC while allowing AC to pass. Since music is AC, this is a good thing. Ideally, the best cap is no cap, but this is not always practical. This article compares several different caps. In general these are mostly inexpensive. This is for the practical reasons that a) this is usually what people want to know about, and b) it is what I have more of. As nicer caps come into my posession, I'll add them to the list, but it is not likely to happen too often. For now I am more interested in the differences between various inexpensive parts.

Some Notes on Coupling Capacitors

 

I was browsing though some space charge tubes (these were tubes designed to operate at low voltages -- usually for car radios) recently and happened upon the 12K5 which is designated as a power output tetrode. I thought it might be useful for driving some headphones, and when I went looking, it turned out that others had been here before me.

DIY - Low Voltage, All Tube, Guitar Amplifier for Headphones

 

This Christmas, it’s all about Do-it-yourself decorations. Rosie Millard gets out the glue sticks and glitter

DIY Christmas decorations

 

What should you do when you forgot the password to login to Windows system? Ask an administrator to reset the log on password for you. If you yourself are administrator, and you can’t remember the administrator password, the problem get a little tricky, and probably hard to recover the ‘forgotten password’ again. Before you search for recovery CD or Windows DVD to format and reinstall Windows onto the computer, here a few ways you can try to unlock the Windows to gain access to the system again, at least by resetting the password.

Forgot Windows Administrator Password? Ways to Recover and Reset Password in Vista/XP/2003/2K/NT

 

It's the infamous Ez-12 Parabolic Reflector,

Ez-12 Parabolic Reflector Template

 

The BristleBot is a simple and tiny robot with an agenda. The ingredients? One toothbrush, a battery, and a pager motor. The result? Serious fun.

DIY - Bristlebot: A tiny directional vibrobot

 

An easy step-by-step guide go making a homemade wireless antenna, for a fraction of the cost of commercial antenna. Uses readily available parts, and requires no specialist tools or knowledge. Or in geek speak - a diy homebrew omnidirectional colinear dipole design suitable for 802.11 wifi compatible hardware with external antenna connector.