DIY: How to Build a WiFi Robot Spybot. Using AC with LEDs (Part 4) - The New Technologies. Some of the roadblocks in general acceptance of LED in the home has been the relative high cost per lumen and the complicated and clumsy power conversion systems. In recent months, a number of new developments promises to bring us a step closer to a LED-powered world. Taking its cue from the ATX system which powers our computers, a new line of "Green-mode" adapters will convert any voltage from 100v to 240v, AC or DC, to run combinations of 1- or 3-watt LEDs in numbers from 1 to 7.
These modules are under 1" in length and can actually be inserted inside the base of a household light-bulb. Here, I've chosen a conversion module designed to power a single 3-watt LED at about 700mA, but have attached it to 8 x 100-milliAmp "Superflux" LEDs in parallel, which allows me to simplify heat-sinking and light dispersion. S.P.R.E.E. (Solar Photovoltaic Renewable Electron Encapsulator), a Compact, Durable, and Portable Solar Energy Generator. For under $160 you can construct a S.P.R.E.E. to harness clean carbon-free solar electricity to power your portable electronic devices.
Project: S.P.R.E.E. (Solar Photovoltaic Renewable Electron Encapsulator), is an experiment in alternative energy and solar generated electricty.The impetus for construction was the desire to have my cellular phone and other small electronics run entirely from free* renewable solar energy. The goal was to spend the least amount of money possible to design, construct, and maintain a portable, weather-proof, small-scale solar powered battery charger to re-charge any small electronics.