How to Charge Any USB Device by Riding Your Bike

Step 7 The Enclosure.

In order to protect the circuit from external elements, an enclosure was necessary. A "pill" of PVC tubing and end caps was chosen, with a diameter of 6cm and a length of 18cm. While these dimensions are large when compared to the circuit, this made construction more convenient. A production model would be much smaller. The PVC was selected based on durability, nearly perfect weather-proofing, aerodynamic shape, and low cost. Experiments were also performed on containers crafted from raw carbon fiber soaked in epoxy. This structure proved to be both strong and light weight. However, the construction process was extremely time consuming and difficult to master.

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[gamal kotp]

i am habye thank fo all