UV nail lamp

thingiverse

Hi everyone! I built this UV lamp a few months ago, and now I'm excited to share it with you. I'll do my best to explain it clearly, so don't hesitate to ask if something doesn't make sense - English is not my native language. This project is designed to be budget-friendly, so the entire lamp should cost less than $8 if you can find good deals. WHAT DO YOU NEED? * 6 high-power UV LEDs. I purchased ones with a wavelength of 395-400nm, which work well and don't require shorter wavelengths - they're safe for your hands. When choosing, make sure to select those with 16mm rounded bases so they fit properly (COST: $5). http://www.ebay.com/itm/1-10-20-50-pcs-3W-High-Power-UV-ultraviolet-365nm-395nm-420nm-LED-Lamp-Light-/221810182099 * 1 microUSB step-up converter. I chose this power supply because it's easy to find and provides the extra voltage needed to drive the LEDs. If you want to use a different type of power supply, you'll need to modify the rear face (COST: $2). http://www.banggood.com/es/2A-DC-DC-Boost-Step-Up-Conversion-Module-MicroUSB-2-24V-To-5V-28V-12V-9V-24V-p-1019102.html * 3x 1 Ohm 1W resistors. * 1x Prototype PCB (optional). If you want to make the wiring process easier, consider buying one of these - they're inexpensive and can be found easily (COST: less than $1 for a pack of 10). * Cable to connect everything together. INSTRUCTIONS I apologize for not taking pictures during assembly, but I think it's relatively straightforward. First, print the LED holder part, which has six pairs of holes - each pair is for one LED, so you'll need to wire all LEDs and pass their cables through the holes (one positive and one negative). Once all LEDs are in place, glue them to secure them. Next, wire the LEDs and resistors as shown. The left and right ends of the circuit will be connected to the step-up converter, so make sure the cable you use is long enough to reach the bottom of the lamp. When you've finished wiring, pass the two end cables through the rear face tunnel - this is a good time to glue the step-up converter to the rear face and ensure it's easy to connect the microUSB cable without any issues. Finally, connect the LED circuit cables to the step-up converter. The cable from the LEDs goes to OUT+ and the one from the resistors goes to OUT-. Before assembling the final parts, plug it in and test it - this is crucial! Adjust the screw on the step-up converter to get the best performance. It's essential to spend some time here to achieve the best results. If you have a multimeter, aim for an output voltage of around 7V. On each try, wait at least three minutes to ensure there's enough current - it might seem like everything is working correctly, but the LEDs could start blinking due to insufficient current after a few minutes. When everything is done, assemble the LED holder to the core part (no glue needed) and apply some glue in the core holes to secure the rear and front faces to the core part.