With the growing amount of microcontroller work I do, I needed a quick, easy way to prototype my projects. With this in mind, I came up with the following 40 pin module, which provides +3.3V, +5V, +12, -4 & -12V regulated power, as well as 10 pushbuttons and 20 LEDs.

Power is sourced from an ATX connector, which saves on expensive componentry and plugpacks.

http://alastair.d-silva.org/breadboard-helper