Two different methods of shifting from 3V3 down to 1V8 and vice versa. The second method is particularly useful as it requires less components and is bi-directional. The first method was required for prototyping a GPS module and was needed in a hurry and had to fit in a small space. I have included the work I did breadboarding the design as I was fairly happy with how small I got the circuit.

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