Making UV paint.- How to

Hi, I need some UV paint that is inviable under normal light that turns bright white under blacklights. I will painting it on a giant hanging sign. I need a recipe for some uv paint or a cheap source of it. It looks like it cost around $70 dollars for 1 gallon and I need around 3 gallons of it. I know that you can use tonic water but I don't have experience using it (How bright will it glow). Also you can use laundry detergent but I dont know if it will show in normal. The key is it to not glow the under normal light and for it glow brightly under uv light, and it needs to be cheap. Any one have any experience with uv lights, paints, or other related things. Any comments are welcome. Thanks for your time. Joe R

Posted by joejoerowley 10 years ago


UV lights and Photochromatic lenes question

I wear eyeglasses and like having the photochromatic lenses. But the problem is, while using them in my car, when I need them most, the UV protection built into my cars windshield and windows, prevent my glasses from turning dark. My question is :   Can a small, battery powered or car powered, light array be built using UV producing LEDs, assuming there IS such a thing, that can be switched "on" to make my photochromatic lenses turn dark while driving? Maybe have it clip onto the sunvisor, or attached to the overhead center console, aimed toward my face. Thanks

Posted by wolfsmane 5 years ago


Another theory...

I was wondering if this is doable, or even practical for that matter. So I read up on lasers and from what I can tell it is a form of light in which the wave frequencies are perfectly aligned. So I was wondering if you aligned UV light wave frequencies, would you get a laser that would burn stuff, and not to sound morbid, but in high quantaties, kill people. (Only for the sheer exitement of figuring something out am I posting this. I do not in any way want to kill someone.)

Posted by vroom...vroom... 6 years ago


A shameless plug!

Right, I've cut it fine on the deadline, so I'm giving my Invisible Costume Instructable a shameless plug here = got to get the view-count up somehow ;-)If you need any incentive to have a look, it's the costume I failed to make in time for the Hallowe'en contest. Go see what you nearly missed.Why are you still reading this? go, click, get my view-count up!

Posted by Kiteman 10 years ago


UV filtration in your fish tank or small fish pond

Year after year the topic "I have a fish tank" seems to go more out of control. What was once a hobby just to have some fish can now be a design feature both in your home and inside the tank. Realistic looking lasdscapes, optical illusions that make you think the tank is much bigger and the list goes on. But one thing that now always pops up is the must have thing of UV filtration. Or to be precise: UV-C sterilisation! Now, if we trust Wiki and our big water suppliers then UV-C will literally kill anything alive that comes into contact with. So of course it would be a good thing to have for your tank - or not? UV-C is very dangerous for your eyesight and quite harmful for your skin! Looking into a proper UV-C lamp without protection means you can go blind! Even good sunglasses might not have enough protection in the UV-C range, so only use them for additional protection but never without and glass between you and the lamp! Don't be a fool! Treat UV-C seriously! You would not look into the full sun with your sunglasses and would not expose your eyes or skin to a powerful laser, UV-C is to be treated the same way! Let's start by using some boring text to explain the concept a little bit. On a large scale special and quite powerful systems are used to treat our drinking or pool water. Here special UV-C lights with a wavelenghts of 260nm or below are used to shine through the water passing by. There are two key factors here. a) the wavelenght b) the water flow rate and the corresponding time the water is in contact with the UV light To ensure all bacteria, viruses, algae and other harmful organics are dead the water must circulate for long enough so even the last water molecule had a few seconds of exposure. All this only works good with "crystal clear" water for obvious reasons as otherwise the UV has to be even more powerful to pass through. Single cell organisms literally crack into pieces similar to being exposed to gamma rays, more complex cells like algae have their cell membranes damages and the DNA suffers as well causing reproduction loss and early death. Even some chemicals break down, most importantly here chlorine based substances. Differences within the UV-C range! If you bothered to check Wiki about the topic of UV-C you will already know that only certain wavelengths within this spectrum will actuall be powerful enough to do what we want it to do. And here is the first problem for us hobby users. Most cheaply advertised "sterlisation lamps" you find in places like Ebay are actually totally useless. Stating to be selling a UV-C light to sterilze your water in such a case is still not considered to be fraud though. Simply because it still does what it supposed to do, just very slow and with very little effect. Only the so called "short wave" UV-C range is powerful enough! To avoid loosing business during the times of the biggest hype in 20 years no seller will actuall state the available wavelengths. That means without this info anywhere you can be certain the advertised lamp is of little to no use. Even those advertised to be short wave UV-C might not be the real deal. However, if a decent manufacturer is behind the actual lamp used it is possible to check the datasheet for these performance figures - but again most cheap systems come with no-name lamps inside. Check the prices for a reputable UV-C light with the same lamp fitting, e.g. G23 and you will see it might cost more than your entire system. Ok, you have a poper short wave UV-C lamp or consider getting a canister filter with one in it.... Never, ever test your lamp without proper protection!!!!! UV-C will damage your eye within seconds! If you system or lamp does not provide a viewing port or shine through area then you have to place a piece of glass between you and the light! UV-C won't be able to penetrate normal window glass but will pass through quartz glass. Place the lamp in a box and cover with the glass. How make proper use of UV-C sterilisation... The replacement lights are quite expensive, so let's see how to get the most out of them. As said before exposure is the key factor so the flow rate of the UV system must match tank size and flow rate of your filter system. Canister filters with a build in lamp should be designed to match but I will tell you later what to look for ;) Most of us will prefer to have a in-line system if there is already a good canister filter at work, so I will focus on those and rop in solutions. If you compare in-line system you might notice that some quite small and low power units claim to allow for the same flow rates as for example 40W units. Some are fraud and just want to sell while others use simple physics to make the claim true. A good system will utilise an auger like "ramp" that forces the water to circulate around the tube many times - causing up to ten times longer exposure rates. Others create this sprial effect more like a vortex with some diverters and modified inlets. The later seems to be less efficient though with low power lamps. An in-line system should be on the outlet side of your canister filter so the best quality water will pass through it. A drop in solution should be used alone and without the existing normal filter pump you might have in there. Ok, got it, but how do I actually use it now? Despite common thinking a UV-C system should not run 24/7 like your normal filter. You really only need it to solve problems you should not have in a healthy tank! It is not a magical solution to make your underlaying problems go away ;) Let's start with the most common reason someone buys a UV-C system: An algae or bacterial outbreak causing greenish or milky water. If that developed slowly over a period of weeks then you would be better off to do a good clean of the tank and filter plus a decent water exchange. A few drops of meds will do the rest. And if you constantly get algae growing on your glass, ornaments and plants then your nutrient levels and water quality is not right anyway and needs a good check. But of course there is also the problem of light - too much for too long and unwanted gree appears everywhere. If in doubt reduce the light power, shade out natural light or reduce the on time for your lights. Having said that we now face the problem of a sudden outbreak after introducing new fish or plants. If you don't have a quarantaine tank chances are that sooner or later you get unwanted or even harmful guest into your tank. Here the UV-C will be beneficial, which is why a canister filter with build in light should have a seperate switch or power supply for the light. After an outbreak or while introducing new life into your tank the UV-C will remove a lot of the things that we don't want to bring along. For new life I leave the light on non stop for a week, that is for a small 4ft tank with 200 liters. To control an outbreak it depends on how bad it is. I assume here you can still see the back of your tank  but that the water either appears greenish or slightly milky from bacteria. As a personal thing I prefer to to remove and clean my filter material before treating a severe outbreak. Once done I fill the filter with a mix of activate carbon material and fine filter wool. Reason for this quite simple: The outbreak causing stuff is already in your filter material and will be a constant source of re-infection. And since breaking down all this bad stuff causes even more bad stuff to be produced as biological waste we want to discard it properly once done. Using just fine filter wool and activated carbon also reduces the flow rate bit if compacted ;) Now we can turn on the light and pump and forget about it for a while. It is not recommended to run UV lights on a timer as you want them on all time to prevent short lifespan and have ongoing treatment of the water. Good idea to take a picture at the same of a day from now on to compare and check results. After 3 days the water should definately be clearer, if not then either your filter material is packed too losse or the lamp is no good. Once the water appears to be clear do a readin test - take a newspaper behind the tank and check if the text is clear - blurry means the water is still not clean. You will reach a point where the water quality will not further improve as much as in the days before. This is the time where you discard or clean out to dry your filter material and put the original stuff back in. The activated carbon should be discarded of course. You cleaned filter material will now need a certain time to grow enough good bacteria to go back to the old performance. During this time you should still leave the light on. In most cases with enough fish and plants in the tank a week should be sufficient. After that you can leave the light off and keep the tank fit and healthy. Special case: Algae everywhere! Especially after getting a new plant you can end up with quite pesty algae growth. Be it these long ghost hair types or in a bad case the black stuff growing on plants, ornaments and the glass. I have even seen tanks with algae covering the entire bottom of the tank causing the gravel to look like carpet. Here I can only advise to set up a quarantaine tank for your fish. Then remove all infested material for manual removal and cleaning. Infested plants should be cut clean and what can be boiled should be boiled in water for a few minutes. Now start scrubbing in the tank with ongoing water replacements. I prefer to let everything settle over night without any bubbler or pump running. This way I can suck up a lot of sediment the next day. If you can remove all plants and fish you can now use hydrogen peroxide and add it to your tank water. But this is only feasable for small desktop tanks. Before using the UV as above to cure an outbreak you should consider all water one last time. Allow at least 2 weeks with ongoing water checks before adding plants back in and another week before placing your fish back in the tank. The week before adding fish should be used to monitor the plats for any signs of algae you might have missed - if you find any remove it! A week after the fish is back in you can turn off the UV light. Underwater UV-C light!? In most online stores you will find quite cheap UV lights to be advertised as underwater or in tank use. Although it might sound tempting you should be well aware of the dangers of using them. The glass of your tank will block the harmfull UV rays but the water surface won't, so either don't ever look at it or use proper sunglasses with real UV protection. Apart from the dangers to you these lamps are not just cheap in price but also cheaply produced. That means there is no way of telling how much or how little UV-C is produced. If they are good then you still need to know in what type of tank setup you can use them. As plants can tolerate a bit of UV a placement as far away from the nearest plant should do, especially if you can place a bubble wall betwenn light and plants. The fish is another thing as some seem to be unaware of the danger in their tank. This means they can get too close to the light but I have not found any articles explaining how harmful UV-C is to fish or their eyesight. I guess once your fish starts to bounce into everything you know... ;) My advise is to stay away from the idea of hanging a UV-C lamp in your tank, the risk for you and your tank is just not justified. If you need to go cheap then get two or thre of these lamps so you have spares. But use them externally ;) Meaning: Take a UV proof plastic container of small size and place the light in there. To be really safe tape the lid and all holes for the hoses with black tape. Place the container above the water level of your tank and if you only have an internal filter pump push a suitable sized hose into the outlet to feed into you canister. Check how high you pump can make it and place the outlet or overflow slightly below this level. When to change the light? If you made it all the way down here then you might already had the benefit of using light to "cure" your tank. Now we are faced with the high replacement cost for the lamp itself. Ususally only flouroscent tubes are used. It is always good to check after purchase what type of lamp and manufacturer (if there is one) was used. In some cases the system itself is like an inkjet printer: Just a cheap way to make you buy the consumables. Let's say you new in-line filter was priced at $100 to have a nice round number, some are cheaper some much more expensive. The lamp used might be an exotic type and not even be available easy, so before you buy your system check where you can get spares, not just the lamp of course. A replacement lamp can be as ceap as 20 bucks or cost even more than your system if you need to order it elsewhere. The quartz glass sleeve can break too meaning you then need a lamp and cylinder. Going with a reputable brand and paying a bit more certainly helps to get spares in the future. Let's just assume you either got your system in bulk due to the price of replacement lamps or can get them at a reasonable price. UV-C lamps are not like your normal flouroscent light tubes you have around or maybe even on top of your tank. Consider them like the tubes used in the now unhealthy tanning beds. After a certain amount of time they no longer produce enough of the short wave UV light that we need. As you can't see it and most of us won't have the means to specifically measure it we have to trust manufacturers recommendations. For most good brands the numbers are the same: 8000 hours max. Considering the costs it does make sense to keep written track of the usage. Not too hard since we won't use them like normal lights but instead have them on for a week or more without turning them off. I recommend to have a replacement at hand long before you need it. A lamp can fail premature, crack or simply burn out. The 8000 hours are based on 24 hour usage, so one day on, one day off. This could mean for us the lifetime can be slightly longer but I would not go over 9000 hours. As a rule of thumb: If the water does not show good signs of getting clear on day thre the lamp is due.

Posted by Downunder35m 9 months ago


UV LEDs - I have a plan...

I have a plan for an Instructable, and it needs several UV LEDs. #1 son has a toy sonic screwdriver with a UV LED for showing up secret messages. However, it is also quite visibly purple.Can anybody recommend UV LEDs that emit the most UV and least visible light?

Posted by Kiteman 10 years ago


USB Powered UV Light

Hi, I would like to build a germicidal lamp which is powered by USB for a school assignment that I'm doing and I was wondering if someone could help. I did a search on a trading site to see the type of  lamps and there seems to be 3 types, cold cathode, quartz and ones which actually look like bulbs. Which type can be easily wired so that it can be powered by a USB port? Advice will be appreciated.

Posted by egrayton 5 years ago


Flood Blacklight?

I know there is already some similar posts but i couldnt find anything relating specifically like this. I got a flood light with the intention of turning it into a flood black light. I want to light up a basketball court sized room using 4 at most. I have a few questions: 1) Is there any way to add anything to the front to turn this in to a black light (Don't need it to be UV rays as I know it's not likely. I just want it to make things fluoresce when it shines on them)? I'm looking at doing something similar to the sharpie black light hack. 2) This light puts good clear light for more the 40 yards. If there were a way to mod it into a black light, how much will it affect the range of good light? 3) Is there any way to connect the lighting to a battery pack or some sort of regular 3 pronged plug?

Posted by DavidK52 3 years ago


UPDATE !!!! Sneak Peak: preview of initial results of my prototype display case....

Here is what I got when I fired up the project in total darkness......it needs tweaking, which I will do this weekend and hopefully publish then. WOW !  Is this ever taking a LONG time (and back breaking work at my bench).   Had I thought ahead, I would have saved myself a LOT of trouble and gotten myself some LED sockets....soldering over 90 pairs of leads is tedious at best.....

Posted by Goodhart 7 years ago


Where to get purple UV inks for PCBs?

Hi all! If someone knows, please share the info on where to get purple PCB ink. Or maybe dry film (solder resist)? I'm searching the Internet, but I'm not having any luck. It looks like I'll have to mix it by hand by combining blue and red..

Posted by tlakic97 3 years ago


CFL's putting out too much UV radiation?

Our local (I think) news service has done a story about CFL's emitting too much UV radiation, You can view it here.Would you rather sit under an incandescent light or a CFL for a extended period of time?Do you think they should have warning labels on them?Do you have any other opinions on CFL's and energy saving globes?Or do you think this is all just a way to get more people to but the old incandescent bulbs?

Posted by thermoelectric 9 years ago


Need help and ideas for graffiti

Inspired by the GRL i've thought of a cool idea for some graffiti:Overview:Using clear, or almost clear UV paint in 1 or 2 colors do a artsy stencil somewhere.then using a solar garden light, switch the LED for a UV and waterproof the wires and board somehow and find a way to attch so its hidden or out of reach.I would want to do this on the side of an overpass, perferably metal so i can use magnets to place things wherever i want. The panel would charge the singe rechargable AA (might mod to last longer) and then after it got dark enough the UV would show the work for a few hours untill it drained the battery.What i need help with:will paint like this ( http://www.clearneon.com ) be bright enough, any other suggestions for paint that won't be obvious unless its lit up.Will the UV LEDs be enough to see the art from a car driving below?any general mods or ideas to improve it?

Posted by aaronx 10 years ago


How can i make an duplicate of CND UV LED nail curing lamp ?

Hello there! I am planing to make a duplicate of  CND led nail lamp (image 1) . I have an older normal UV lamp (image 2). I have the led Bulbs and the driver for them anid bought relay timer from ebay and the 12v transformer. But the hard part is to make the exact programs. The CND lamp has 4 buttons witch are different programs. 1st - 10 seconds flashing. 2nd - 60 seconds from witch only the first 10 seconds is flashing. 3rd - 60 seconds on. 4th - same like 2nd program. How can i make the programs i have bought and buttons witch i will install?

Posted by IvoIvan0v 3 years ago


Need small battery powered UV emitting LED light for board game

I'm in need of a couple dozen battery powered "throwie" styled (read: super simple)  UV light emitting LED's for a board game prototype.   The devices (12 total) will be built into simple chipboard player pieces on a stand.  I'd like the entire piece (including the chipboard and stand) to be no larger that 1" x 2" x 1", but here is the catch! Each piece will start with 3 pegs placed in the stand (a la the classic board game "Life")  that keep the light on as long as there is at least 1 peg in.  Don't know if this would mean they are pressing a button or completing the circuit, but whichever is safest is ideal! I also need a 2nd version that will operate with a simple on/off switch or button that can be housed in a small piece of foam core board (.25" thick, approx. 2"x 2" piece).  I need 12 of these as well. Concept sketch attached, but more detailed information will be provided upon inquiry.  I would need them to be completed and delivered by Friday, June 8th, 2012. Thanks in advance for your help (whoever the helpful soul may be!)!

Posted by theharperimage 6 years ago


rgb led uv usb light that responds to music for a DJ

I wanna build a light to plug into my laptop powered by usb thats UV led's to light the keyboard and have either changing to red light or multi-colored lights. Or just keepin it UV and strobing

Posted by ddude04 9 years ago


UV LEDs for Sanitation

Would UV LEDs be suitable for sanitation purposes? If so, does anyone have information on how many, of what type, and how long exposure is required for different materials? Thanks!

Posted by Weissensteinburg 9 years ago


FINALLY, the scorpion is complete with UV lights and GITD paint

The long awaited finishing of the Scorpion that a young aspie friend and I built together is complete:  I have installed the UV LED, and circuitry AND coated the insides with clear coat UV reactant  paint....so it glows both after the UV light is turned on, and also in the dark.

Posted by Goodhart 6 years ago


UV LED LIGHT BOX FOR PCB WITH ARDUINO

Hey guys, im in the process of making a UV LED Light Box for PCB making, im planning on using an arduino nano. the picture is how i plan to wire everything (i used EveryCircuit btw) but i cant seem to make the circuit work in real life, any advice? thanks in advane

Posted by Rafael_RMoreira 2 years ago


UV Filter on a digital camera

I was told by a few people that UV filters are useless on a digital camera. I also listened to the sales guy when I bought a DSLR just recently and he said "No they serve no purpose for the pics with a digital camera, but it adds a layer of protection to the front lens. UV filters are cheap, I bought it based on the salesman's advice. Yesterday it paid for itself . I was getting ready to take some pics of the neighbors new sports car and he was showing off,  spinning the tires when it happened. The filter just all the sudden shattered. It had to be from a rock, but I could not find one anywhere.... anyway... The camera lens is fine and has a brand new UV filter on.

Posted by SlickSqueegie 5 years ago


Transparent Electrical Insulator Film

For a project of mine I need to apply a <1um thick film that is electrically insulating, but transparent to UVC & UVB (and preferably up to visible). Does anyone have any suggestions?

Posted by SillyInventor 2 years ago


UV high power

Don't use on your Hotel room covers, chairs or bed sheets! ...you don't want to know! UVA/UVB high power LED's and some white use UV with white phosphors so be sure to wear eye protection...

Posted by erckgillis 11 years ago


How to make florescent ink?

I have Googled and searched Wiki on how to make fluorescent (ultraviolet) inks. I want to know how to make them. I dont want th lemon juice , corn starch, milk or other types of invisible inks. I want to make the stuff the glows under uv light. I searched using uv, ultraviolet, fluorescent inks but couldnt find anything other than the lemon juice and other types of "invisible" writing. Please help if you know where to find or if you know how to make fluorescent (ultraviolet) inks. You can email me at whitethatchpotentloins@yahoo.com I mean the inks that u can buy for handstampers and that are put in invisible ink markers. I want to make the stuff myself and not have to buy it off the internet.... So while yes there are alot of things that glow under UV, I want it in liquid form.

Posted by WhiteThatch 10 years ago


Best solar light, UV LED to use for UV Sun Jar

I'm making a Sun Jar, but I want to swap out the normal white LED for a UV LED. My plan is to spray the inside of the jar with invisible UV reactive paint, so when then LED comes out, the jar suddenly starts glowing a different color. I tried making one tonight, but wasn't happy with the results.  I was using the black plastic Hampton Bay light from Home Depot - http://www.homedepot.com/webapp/wcs/stores/servlet/ProductDisplay?storeId=10051&productId;=100068888&langId;=-1&catalogId;=10053&ci;_sku=100068888&ci;_src=14110944&cm;_mmc=shopping-_-googlebase-_-D27X-_-100068888&locStoreNum;=1002&marketID;=48.  It's only powered by 1 AA battery, and the resulting glow from the LED was really dim.  I got no reaction at all from the UV reactive ground marking paint I was using in my test. Any suggestions?

Posted by mikejstein 8 years ago


Night vision goggles

Can someone make an instructable for night vision goggles? You could make UV goggles and use a UV led or something.....

Posted by thebeef2 8 years ago


3D Model Maker (CNC)

I don' t have the technical or computer skills to make this happen, but I'll bet someone out there does. I've heard of and read about these polymer 3d model makers and I understand that a few colleges have them. I know that one in my area does, as it was reported in the local newspaper. I also understand that they are quite expensive. I've seen the Instructables for some 2D routing tables, and even a couple for 3D work, using a hot glue gun or some other flexible material for building the model. Crude results, comparatively speaking, but impressive from the standpoint of the home hobbyist.  I've recently learned of a product called Solarez, which is a UV curing resin for fiberglass work. No limits on the working time of the resin, no gelling up in the middle of a job, it seems like a dream for complex fiberglass projects. Put it in the sun and three minutes later, it's fully cured. There are videos on YouTube for the fiberglassing aspect of things. They are not as exciting as the Instructables, but they are instructional. I plan to use Solarez in my future fiberglass projects, but I have a quart of very expensive epoxy resin to use up first. I figure if you fill an aquarium with Solarez and put a Z-axis table at the bottom, and a 2D UV laser on the top, you've got exactly the same thing for which others are paying thousands of dollars. I don't know how strong the Solarez would be in a stand-alone construction and I doubt that the manufacturer of Solarez intended it to be used in this manner, nor do I know how the stuff would react to a UV laser, and if it is practical from an elapsed time frame of reference. Again, I don't have the tech skills, nor even the need for such a device, but I think it's within the skill set of some of the more talented Instructable builders here. Just some random thoughts...

Posted by fred_dot_u 8 years ago


Shattered CRT Safety

I'm thinking of cutting the phosphorecent screen off of a CRT and seeing what effects I can produce by shining some high intensity UV light on it. Removing the screan is going to be tricky since the entire CRT is a vacuum on the inside. I know I'm going to have to be really careful and let the pressure in slowly or it could implode and send shards everywhere, but I'm also worried about what dangerous substances might be in the CRT that I could expose myself to. Does anyone know if there is a danger of lead/mercury/etc on the inside of the CRT, and what safety precaussions I can take?

Posted by kramerr 8 years ago


What would you do with a Deuterium Lamp?

I was going through a box of junk a University Lab wanted to get rid of and I pulled out a Deuterium Lamp. This small thing produces a steady blue-green light as powerful as a camera flash, but most of the light these things create is in the UV Spectrum. I Feel like I must make something with this. My First thought is to block the UV so I don't blind anyone and turn it into a bike light, but I already have an epic 300 LED bike light. Can anyone think of a good application for a powerful source of UV Radiation?

Posted by kramerr 8 years ago


Focus an LED

I was wondering if anyone knew how to focus more than one LED (infra red) into one tightish (about 1m at 100ms) beam. This would actually be for a laser tag gun that i would like to make an instructable about. The game is based on these high powered infrared leds that are focused by a 2cm-5cm diameter double convex lens assembly. Snipers obviously need further distance and have a tight beam while others have a much wider beam. The focus can be adjusted by moving the led back or forwards. Having more than one LED may lead to dramatic leaps in range (so it is theorised). I have been told to use cube beam splitter but i don't even know what they are. Thanks community any help is seriously much appreciated Thankyou Thankyou Thankyou Thankyou

Posted by DELETED_D4VOBRO 9 years ago


Wind-Up Charger For a UV-C Wand

Hi I have a UV-c wand which I acquired recently and instead of running it off mains or batteries I would like to make a wind-up charger for it (similar to the wind-up torches).  It would also be good learning for me as I am a novice at electronics and it doesn't seem like too hard of a project. The mains input for the wand is 6v DC, you can also use it with 4 AA batteries. Instead of having rechargeable batteries I was thinking of having the winding mechanism to charge a capacitor.  The UV light is rated at 4 watts and it would be great if I can get 3 minutes of use from 3 minutes of charging and even better if there was some sort of notification which would let me know when the capacitor was fully charged (like an led lighting up). Another way that I was thinking was that as you were winding, the light would be working at the same time, so instead of taking 6 minutes for the job it would take 3 minutes. Help and advice will be appreciated. Thanks

Posted by jezym108 7 years ago


UV Screen Comments

Hi all, I'd appreciate some feedback on my UV screen project. As a relatively new blog I have effectively zero traffic there, so I thought I'd ask for some feedback here. The goal of the project is to provide an easy way of converting a record player to a UV screen (as pictured). The idea is to replicate the appearance "Death calls the tune" project by Lab Binaer, although I'm avoiding using an arduino in an attempt to keep costs down. The ultimate goal is an instructable, but before that stage I hope to work a bit more on the available functionality (currently it will just write text to the screen, each phrase being written alternately in one of three positions). Here are some planned but as-yet unimplemented short term goals; Investigate replacing the serial connection with V-USB New modes (Bar graph output , Seismograph style output, Spiral text) New stylus using SMD LEDs (currently uses 5mil) Offload all settings to XML file Slow rotor speed further I'd be appreciative if you could offer ideas for new functionality, uses, modifications, any thoughts or comments. Thanks, Drew

Posted by andy 7 years ago


Wood varnish questions

I want to varnish this birch plywood platform to keep it as waterproof and UV resistant as possible but also keep it as close to it's original pale birch colour as possible. i've never varnished anything before so i've been googling for answers and i'm getting some conflicting information, i've been looking at different clear outdoor varnishes and most claim to protect against UV light and not leave a yellow tint but most reviews say otherwise and some general varnishing info articles claim that clear varnish can't protect against UV at all and i'd need a dark stain which i really don't want. so what can i do to protect the wood against the elements and maintain the colour as much as possible? can i combine varnish with other stuff? i found some clear 'marine varnish' is this heavier duty than normal wood varnish or something?is there an alternative to varnish that will have a similar effect?if i need to modify the platform later, cutting bits out or drilling new holes is it ok to just apply another layer of varnish to reseal it or will it need preparing in some way or some additional step?

Posted by ambientvoid 10 days ago


subscribe or patch me!

Hey people just want to know if you can patch or sub me.

Posted by 2hot2hack 7 years ago


Make writing appear on a wall

We are having a party and I would love to make writing appear on a wall. Any suggestions? One thought is to have invisible UV paint and shine a black light on it.

Posted by abugslife99 5 years ago


UV Surface Mount LEDs

I am currently modifying an iBook G3 so that, among other things, it will be fluorescent orange. Currently, when the computer sleeps, a white LED illuminates through the casing. Since the casing will now be fluorescent, I would like to replace the white surface mount LED with an ultraviolet one, so that the case will glow as the computer is sleeping. I was wondering if someone could help me out by telling me where I might be able to purchase an ultraviolet surface mount LED? P.S. The image included will be stenciled and mirrored on each side of the apple on the top of the iBook.

Posted by Ora 10 years ago


Seeing Auras &amp; Ghosts

I have posted this on other forums without much response. Since some of the best minds use this site, I should get a lively response. Friday, on a TV show called 20/20, they interview some kids that said they see auras and spirits. Do any of you know people who can do that? I have tried to see or photograph auras without success. It seems that these things may be visible either in the ultraviolet or far infrared and require someone with eyes that are more sensitive to these wavelengths. Young kids would be better at that. Infrared and ultraviolet light (UV) are in our environment, even though we can't see it. You would expect that different people would look different under UV, just as they do under visible light. Additionally, some things show fluorescence under UV. Perhaps auras are differing fluorescence by individuals as seen by those with extended visual response. It might be interesting to look at various people under just UV or just infrared (perhaps using night goggles) and note the observations. It would be interesting to have someone view auras through various filters to see how the auras change. Are auras affected by magnetic fields? Would smoke in the air have an effect? Does the aura look better with a dark background? Does getting drunk help? Ghosts are probably more difficult. It is to be expected that God doesn't want us asking them sensitive questions (like "Where's Heaven?"). ~Bob~

Posted by ShutterBugger 8 years ago


Resistor value?

I'm making the circuit attached, can anyone help me with what resistor value (marked by "?"). What value will need when I connect 2 UV LEDs into the circuit. The pack says LEDs are 3.1V. Any help would be greatly appreciated...

Posted by Lee Fraser 5 years ago


robotic arm arc welder

Is it a robotic arm capable of arc welding feasible for a diyselfer ? I spotted some robot arms for cheaper than 200 $ over the web . Vantages for the operator would be no weld fumes breathing , no uv rays and such ..

Posted by gabdab 5 years ago


Inkjet $$$ Ink. Why so expensive?

Whats the cost of inkjet ink? 1000/gal?  could somethin else be used? whats so special about the stuff? and could we run lemon juice thru for invisible ink?  or a UV  ink?  or foodcoloring?

Posted by Toga_Dan 3 years ago


Adhesive/fill material needed

I need an adhesive or fill material with some special properties. It should be a moderately viscous liquid that sets up into something very flexible, jellylike would be ideal. It should be applicable in very small quantities. It should flow before curing and be self leveling unlike silicone adhesive. Tensile strength is relatively unimportant. It should not adhere to two part tin based casting silicone. An analogy that comes to mind is E6000 adhesive but it's viscosity is a bit too low and it sets up way too hard. UV cured resin like Loon UV Knot Sense (great stuff that I learned about here) comes close and has the right viscosity also but also cures too hard. If you know of anything, I've got a project on hold until I find something and would greatly appreciate advice.

Posted by dgateley 4 years ago


I've found a UV/Black-light flashlight thing, What should I do with it?

I was digging through some old stuff when I found this flashlight thing. The top is an actual flashlight (broken), but there is a (working) black-light running down the side. Is there anything cool I can do with it? Or build or something?

Posted by Spl1nt3rC3ll 10 years ago


Websites that give you info about the care and growth of many plants.

I need a list of websites that give the following info about a few plants (mostly veggies and fruit.) 1) zone 2) uv light needed 3) water needed 4) growth period and some care tips Thank you in andvance

Posted by crc09 8 years ago


Scholarship Roomba Create Idea: Mouse Trap

My idea is for the robot to be a mouse hunter. I know this sounds far fetched, but all you have to do is load it with peanut butter. To describe the trap: You attach a capacitor, and leave the circuit open. The robot remains unmoving, and waits for the mouse to go for the peanut butter. When the mouse steps on the two separated plates, attached to the Create, the mouse closes the circuit, releasing the charge in the capacitor, killing it instantly. (A disposable camera works great for this, it has capacitor and voltage needed to kill a mouse.) The Create would search for either movement via IR, or, if possible, UV reflections from the ground. Mice leave trails of urine that reflect UV light. These trails give the Create an excellent place to set the trap. Once the charge of the capacitor is released, the Create will sound an alarm and flash an LED. Perhaps scooping the mouse into it's undercarriage and moving on to find another ideal trap site.

Posted by Holeinmysock 11 years ago


LED Lights don't attract bugs

Everyone hates the bugs that gather around lamps and other lights. Everyone loves LEDs. Apparently LED light bulbs don't attract the bugs the same way as incandescent and fluorescent bulbs do, as they don't put out UV light.Check it out:http://energycircle.com/blog/2009/06/16/newsflash-leds-dont-attract-bugs/

Posted by Weissensteinburg 9 years ago


Stereolithography Peachy printer style 3d printer

Simply I'm an RC hobby enthusiast so i have alot of servos lying around I was wondering what would stop me from using a couple of them to control the X&Y axis for mirror alignment when using a UV laser for 3d printing or something like a write head on an old HD?

Posted by Jack Daniels 3 years ago


NES Bedding, Apple Cider Donuts, Metal Casting with Sugru

NES Bedding Apple Cider Donuts Metal Casting with Sugru Hand Lights Dr. Who Inspired Watch Green Tomato Chutney Creepy UV Sun Jar Ultimate Parts Storage Bike Part Belt Make a Dragon Skull Networked Sprinkler Controller Bent Wood Rings LED Monitor Backlight Read Credit Cards Wireless Altoids Display

Posted by randofo 7 years ago


Surface Mount LEDs

I need almost 200 SMLEDs for a project. However, I only want 6 colors of 36 each. If anyone wants to buy the extra 300, or something like that, please make an offer. I will get 6 from this list, but I need them all to look different enough: White Red Orange Yellow Lime Green Green Blue Green Blue UV Or, if anyone knows a place where I can buy them in small quantities, please let me know :-)

Posted by zachninme 11 years ago


Help Needed, 3D Printing Via Electroplating

A few years ago I saw a 3D printer that printed using UV reactive resin and a DLP projector and I obviously started thinking about ways to make this for myself. Recently I have been entertaining the idea of repurposing the old CRT technology with phosphors that produce UV light to replace expensive DLP projectors but I couldn't think of an easy way to do that. I was fiddling with various ways of repurposing one of my old CRT monitors when I had a decent idea. Instead of converting electron beams into light to harden resin why don't we harness the electron beams for the purpose of electroplating! Instead of resin we could use an ion solution and build models out of metal! Of course we would still need to replace the phosphors embedded glass screen with a conductive plate to serve as a non-consumable anode. Unfortunately I do not have the time or resources to do this myself so I wanted to post this to the Instructables Community and see If anyone felt this was a worthwhile project.  Please let me know what you think of the idea! I would love to see this turn into an actual project.

Posted by gooeyideas 4 years ago


Used Camera

I just got a Minolta XG-M Its a little dirty but works fine, is there anything I should check for. Also what type of external shutter thing would it use? It came with: Body Kit lens 50mm 1.4/f Extra lens 35-70mm 3.5/f w/ Macro 1:4 1:7 UV[0] Skylight[1B] Any tips for cleaning I already cleaned the lenses with a micro-fiber cloth but the mirror and body is dirty. Also is there anyway I could get a manual

Posted by acer73 11 years ago


clean and reuse washwater

I want to clean and reuse my washing machine water to wash clothes.  The system must be #1 cheap to build(off the shelf parts), #2 cheap to use(wasting power to save water is stupid). I am thinking, an easily accessed fine mesh lint trap. A second stage to remove chemicals (sand?charcoal?) and a third to kill any buggies (UV light?). I will also need to address which products are best to use for this system. And of course a valve too return to the "normal" system for some occaisions. Thanks for any input . nursenary     

Posted by nursenary 6 years ago


Adruino cyclone dust sensor

I am looking for suggestions for building a wood chip / dust level detector for the collection can of a cyclone vacuum. I have tried using uv detectors, they get covered in fine dust and become in-effective.  I am thinking of using the ultrasonic sensor. My objective is to detect the level of chips and dust collected in the debris can, and sounding an alarm when the can gets to the full point. Any help on this subject would be appreciated.  I am new to working with these Adruino controllers and not real familiar with writing the Sketches for this. Thanks Don

Posted by Don D 7 months ago