Introduction
Throughout this semester, we have experienced what can be referred to as a “survey course” in alternative energies. However, the focus always seems to come back to solar energy, what is currently the most well-known and widely used renewable source of power. Solar power is also perhaps the most appropriate energy channel to use in the Lake Tahoe Basin. This area receives over 300 days of sunlight per year, even during the snowy season. Additionally, we are located at a higher altitude, so the sun’s rays are more intense than non-mountainous areas.I decided the most practical and useful project for me would be a solar powered charger of some kind. This is something I could potentially use every day, granted it’s sunny without too much cloud cover. Even if I’m only saving a few Watts per day, it still helps reduce electricity consumption on a basic level. And if everyone used a solar rather than electric charger for their phones, the energy saved would definitely add up. Furthermore, the charger is light and portable, making it the perfect resource for camping trips, festivals, and anything essentially disconnected from the grid.
Materials
1. Solar Cell (6V 1W 250mAh)
2. Vehicle Power Outlet (12VDC)
3. Project Box
4. Velcro or similar adhesive
5. Power drill
6. Screwdriver
Step by Step Process
1. The first step is to drill holes into the project box, which is rectangular in shape. Drill a 1 inch opening on the short end for the socket to fit snugly inside. It was still just slightly too tight so I used sand paper to widen it gradually until the socket fit perfectly, probably another 1/16 of an inch. Then, drill two very small holes in the center of the top of the box for the wires to go through.
2. Both the socket and the solar cell each have a black wire and a red wire. Strip the wires down (about half an inch) and then twist them together, black to black and red to red.
3. Wrap the raw wire in electrical tape then put all the wire into the box.
4. Attach Velcro to the top of the box and the bottom of the solar cell. Leave time for it to set before separating.
5. Lastly, screw in the four corners of the box down. And voila! You’re ready to charge.
Results
Can receive current from fluorescent lights but not enough to power a cell phone. Needs to have real sunlight to work properly. Isn't compatible with Apple devices. Works well with all other smart phones and devices requiring less than 6V of power. Really convenient, uncomplicated, inexpensive, fairly easy to assemble.