Quick Print UV Led Flashlight

thingiverse

This is a quick-print flashlight I designed as a simple end-of-week project from my Kid's Electronics class, Silly Circuits. I've designed many things before, but this one stands out as one of the first that I've designed entirely myself and completed until it was finished. It took about four versions and three wasted prints to get it right! I'm quite proud of it, so I hope you can find some use from it. The design is flat, with quickness of printing in mind, so hopefully, you can print enough on a single plate to make the time worthwhile. I did record this session on Twitch, and now I'm making a video of how I made this. You can check out my YouTube channel for more information. The 3mm UV LEDs have a forward voltage of 1.2-1.8v and are powered by a CR2032 coin battery. Due to the low voltage of these batteries, a current-limiting resistor is not necessary because the LEDs seem to have sufficient internal resistance. The buttons used in this project are available on AliExpress: https://www.aliexpress.com/item/32826857037.html?spm=a2g0s.9042311.0.0.2dc74c4dqJuRKW. I used the 12x12x5mm variety, but you might be able to find similar options on Amazon or eBay. I printed this flashlight at 0.2mm layer height with a 0.4mm nozzle using Black Solutech PLA at 210 degrees on a Clone ANET printer. The total print time is about 60 minutes: 45 minutes for the flashlight and 15 minutes for the coin battery backpack. The coin battery holder is a modification of this design on Thingiverse: https://www.thingiverse.com/thing:79502. I removed the top ring and made the base slightly smaller. To print it properly, you'll need to use some brim.