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  1. ee

    DC/DC Converter

    what you'd need is smps step down design however this network requires a control ic (most do these days) do a search with the following keywords:smps stepdown circuit or smps stepdown application notes,-- most semiconductor manufacturers will have this information on their websites
  2. ee

    AAA Battery Charger

    you could make a simple one with a rectifier and resistor(s)
  3. ee

    LED

    audioguru: Hi Bryen, Welcome to our forum. I've tried it. A LED makes a very inefficient photodetector. With an extremely bright light up close or light from a similar LED up close, they produce a little more than 1 volt with hardly any current. They also conduct hardly any current. Why not use...
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