Some useful circuits for hobbyists.
I have decided to compile a list of the top ten most needed circuits that are a must know for anyone interested in DIY projects. These are the basics that can all be interchanged and used in conjunction with each other to make many of the projects that we all love so much.
Another article on how to convert an ATX power supply into a lab power supply, posted on instructables.
Instructions on cobbling together a softbox attached to a flashlight.
I don’t know how, but late at night I got the idea that I wanted to covert [sic] my new 3D cell Mag-Lite to a handy photo-lamp. Next morning I dug out some 250 GSM paper and some adhesive foil I’ve been saving for a worthy project and whipped up a quick ghetto-lamp
Instructions on building a lab power supply using a spare power supply from an old computer.
Computer power supplies cost around $15, but lab power supplies can run you $100 or more! By converting the cheap (free) ATX power supplies that can be found in any discarded computer, you can get a phenomenal lab power supply with huge current outputs, short circuit protection, and very tight voltage regulation.
hack a day has some basic instructions on building a portable USB charger powered by a 9-volt battery. This will allow you to recharge your portable device through its USB port when you don’t have access to a computer or a power adapter.
Update: Posted in one of the comments in the article is a modification of the design to use a switching voltage regulator. Link.
Instructions on modding a Pringles can into a macro extension tube for macro photography.
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