Very often people are fascinated by how something works. Other people also have an itch to make things their own way, and make them with their own two hands. One of these things is a homemade electric generator. Many engineers find it extremely appealing to begin constructing something, almost .
If you’re a skin diver of any experience you know that an electric powered sport submarine is great for underwater exploration. Seated in such a vehicle, you can cover more bottom simply because you do not expend your energy in swimming and your precious air can be made to last much longer..
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This project is a solution to power up most of devices or projects requiring dual adjustable power supply. The circuit is based on LM317 positive and LM337 negative voltage regulators..