3 Simple Inventions and Great Ideas

In this video, i will teach you how how to make a 12v battery charger with your old mobile charger. Next, i will teach you how make 12v fixed output circuit from a 20v laptop charger using voltage divider method. Next, i will teach you how to make an electric desoldering pump.

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Видео 3 Simple Inventions and Great Ideas канала The Professor