Build your own solar-powered water pumping station

Build your own solar-powered water pumping station by Jeffrey Yago:

"There are many remote applications where a solar-powered water pump is more cost effective than installing a conventional grid-connected AC pump."

Ciarcia’s Circuit Cellar, Vol. 1-3

Ciarcia’s Circuit Cellar, Vol. 1-3

"Many electronics enthusiasts have fond memories of Steve Ciarcia’s first run of Circuit Cellar articles in BYTE magazine. Since Circuit Cellar headquarters still gets inundated with requests for these columns and subsequent Circuit Cellar books (all out of print), Steve has agreed to make these books available online."

Query: How to Cut Styrofoam

How to Cut Styrofoam | eHow.com - Brief list of various methods

Hot wire foam cutter - Instructables.com: Step by step design using yardsticks for frame.

Foam Cutter - A more polished design using a nicely built spring loaded frame and a custom power supply.

Rocket Team Vatsaas Hot Wire Foam Cutter - PVC frame and a model railroad transformer.

YouTube - DIY hotwire cutter for styrofoam shaping - Using a car battery charger. Not pretty, but it works in the video.