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Nice and simple. This kind of simplicity that make something to be special.
Nice Project!As a teacher you can show variants of the sensors for the laser light. An example may be the use of common red LEDs attached to an integrated comparator to show that all semiconductors are sensitive to light.
Nice idea !I'll grab your idea for my little works at home !
Very nice night lamp!
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NIce work :)You had soldered the box. ¿Do you have tryed to press a flat cover against the box with a screw press? In this way you will not need the treaded hole.