UV counterfeit detector
prusaprinters
<p>UV counterfeit detector made of 27 UV LEDs.</p><p>You only need a 27x 5mm UV LED, a 27x resistor (depending on which LEDs you choose), an old USB cable, a soldering iron, a bit of solder and about 300g of filament.</p><p>Thanks to the use of USB, you can connect the detector to a computer, a standard USB charger or a power bank.</p><p>An example of wiring is in the last photo (I connected each row of LEDs separately). </p><p>For example, use this website for the calculation:<br>https://www.jan-lostak.eu/kalkulacky/elektrotechnika/vypocet-odporu-pro-led-diodu/</p><p> </p><p>The total price is less than 15 USD.</p>
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