Harbor Freight Led Flashlight-----of DEATH!!

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Introduction: Harbor Freight Led Flashlight-----of DEATH!!

About: Working my dream job in the Telecom industry, so chances are, i'll never have time to respond to comments or messages, nothing personal.

Danger Will Robinson, This is a UV mod for my beloved harbor freight flashlight So here comes the disclaimers. UV is dangerous, it'll give you cancer, cataracts, and steal your check book, if you build this, You Will Die!! Although probably your death will not be related to this instructable. But seriously DO NOT shine this into anyone's eyes.

Step 1: Disassemble the Flashlight

take out the "circuit board"

Step 2: Unsolder

the existing leds, save them as supposedly they're 10,000 mcd's.

Step 3: Buy Some Uv Leds

I got mine from Alan Parekh in canada, $.35 each, not bad.

Alan is also an instructables user

Step 4: Solder

The Uv Leds into the circuit board

Step 5: Reassemble the Flashlight

and enjoy the pointlessness of a toy that causes cancer.

PS don't take this to a hotel, it'll spoil your nights sleep ;-)

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    79 Comments

    I actually found this tutorial trying to figure out how to get the circuit board out. I don't want to break anything that I don't have to. Does it come out the front or back? Any tips for getting it out without breaking anything?

    1 reply

    the newer ones you got to tap the assembly outwards from the rear.

    That leds are too much expensive. In Led Shoppe (ledshoppe.com) you get 100pcs for 8$. And... WITH FREE SHIPPING!

    1 reply

    Awesome website. I just ordered 200 LEDs for $13.00. 15000mcd. Thanks for the tip

    and vampires. UV mounted flashlights were used in Blade 2 :p

    I bought one of those light fro HF when they where dirt cheap, now I can buy them, with batteries at the local hardware store for the same price as HF when yo factor in P/H and batteries. I like the but I drop the HF model, and the spring that holds the battery carrier sprung, so now you have to give it a whack to get it working.

    if you did a IR torch light would it be enough light to light a room for a digital picture of say a room? it would make an awesome night vision system :)

    1 reply

    You reminded me of a project I wanted to try, a IR light to see what my digital camera will see. No I have to add UV for the heck of it.

    Just got a couple of these from HF...Aluminum bodies..the "hex" has been replaced by "pins". Fine tips work well to remove the assy. On to the solder station...

    2 replies

    Could you elaborate on this a a little more? I just got this and can't figure out how to get the circuit board out.

    Never mind, I got it. Just took a lot of force.

    Does the Harbor Freight 9-LED flashlight board where the leds where soldered to have any polarity or can you just solder it how-ever you want.

    1 reply

    yes there is a polarity, the center is positive and all the outer part is negative

    These LEDs are NOT dangerous. They will NOT blind you. They will NOT give you cancer. They will NOT kill bacteria either. They do NOT give off the same light the dentist uses either. They are actually "near ultraviolet". In fact, they give off nothing more than narrow band black light much like the fluorescent bulbs you can buy. If you were to stand naked under 10,000 of them for a month or more they might drop your vitamin D level a bit but they are not going to do anything else to you. Don't believe me - go look it up. 400nm is harmless. However, they are pretty cool and are a lot of fun so build away and don't worry about these things harming you or anyone else.

    2 replies

    Not that I didn't believe you, but I did just that: poked around on the net trying to find out which wavelengths can kill bacteria.

    Wikipedia wins again, stating that 254nm is usually used, not just because it's the sweet-spot for germicide (see chart in second link), but because it's what a mercury vapor lamp produces.
    http://en.wikipedia.org/wiki/Ultraviolet_germicidal_irradiation

    This page has some information about the exposure time to kill bacteria, as well as a wavelength chart: now we know anything between 220-315 nm should work..
    http://www.excelwater.com/eng/b2c/water_tech_3.php

    they can blind you they are bright as hell and most of the light cant be seen by your eyes but they probaly arent powerull enough to cause cancer

    The wavelength of LED dental curing lights is 460-470 nm, longer wavelength than these LEDs. Light cured dental composites contain a chemical called camphor quinone that acts as an initiator for a free-radical chain reaction that polymerizes the composite resin. Dental curing lights are normally equipped with a shield that is intended to protect the operator's eyes from the blue light. It necessary because there are chemicals in the retina of the eye can also form free radicals that will cause destructive chemical reactions within your eyes. These LEDs are low powered, but I would not recommend staring directly into them.