Protector Circuit?

How can I make a circuit that will protect an LED when I plug it into a traditional light bulb plug?  hint- homemade LED light bulbs.  

Topic by Buzzsushi 8 years ago  |  last reply 8 years ago


physical ip protector?

Would it be possible to build a physical hub, for protecting your ip, like some sort of adapter, u first plug in you internet cable to it, then you plug the adapter into your computer?

Question by huyu 8 years ago  |  last reply 8 years ago



Custom PC Keyboard protector

I'd like to make a custom fit computer keyboard protector, the type that's made to stay on while the keyboard is in use. This Ducky cover https://mechanicalkeyboards.com/shop/index.php?l=product_detail&p;=999 is very nice, but rare.  Most keyboards have no properly fitting cover available. Also, it would be awesome to say 'I did that.'   What material would be best, silicone?  What mold material? Maybe I could cover the keyboard with plastic film and spray some silicone on top?   It has to be really thin.  I'm guessing pros would use a bottom mold, then squeeze a top mold own on it. Thanks.

Topic by catsintrubles 3 years ago  |  last reply 3 years ago


Lithium polymer protector (LVCO)?

Has anyone used a very small low voltage cut off (LVCO) circuit on a lithium polymer battery? I found a nice collection of lithium polymer cells in a 'dead' laptop battery. Thing is, I don't want to be careful about over draining them and they don't seem to have a low voltage cut off circuit in the individual cells. Sparkfun sells batteries with a teeny LVCO system built into the cell package like this:  http://dlnmh9ip6v2uc.cloudfront.net/datasheets/Prototyping/BatteryProtection.pdf What would be a reliable source of similar reliable boards that protect from over discharge?

Question by snotty 6 years ago  |  last reply 6 years ago


Microcontroller Timered Surge Protector

OK. So I have an indoor garden. A homemade Aeroponics setup for all kinds of lettuce, tomatoes even roses or other flowers for the girlfriend (dude this makes all of it worth it) but I want to be as clutter free as possible and well a gaggle of timers hooked to surge protectos is a hassle. I am looking to integrate a USB stick for the program into a microcontroller that will fit in one of those 8 outlet power bricks. There is quite a bit of unused room in these (almost enough for another row of 4 outlets). In Fact I have seen some of the 12 outlet models with the same overall size profile as the 8 that I have. It is just a regular old belkin entertainment center surge protector but I have a box full of various surge protectors etc. I even have an old backup UPS with a shot battery that I could use that housing but I would prefer a slimmer profile. I want to also use these to control the entertainment area kind of like a smart Kill-A-Watt. Maybe even the computers too. Each outlet could be individually controlled as well as master shutoffs. If you wanted to get really creative you could even set power usage limits for each plug or other Then you would just need a small desktop application to plug all the parameters into. This would by far be the most tedious depending on what microcontroller you use. I am always popping up with these ideas but I lack the expertise in several areas to develop something like this on my own. But I am pretty good at following directions.

Topic by stusatwork 10 years ago  |  last reply 10 years ago


How do cell phone screen protectors affect touchscreen performance?

How do cell phone screen protectors affect touchscreen performance? 

Topic by Ch2112 1 year ago  |  last reply 1 year ago


book styled laptop case

Anyone got any good ideas on how to put one of these bad boys together? I'm not sure how to attach the zipper to the book cover material. thoughts on assembly and padding etc.... http://twelvesouth.com/products/bookbook/

Topic by mrshow555 7 years ago  |  last reply 7 years ago



Tempered glass screen protectors - understand and beware!

I recently had the joy of needing a new screen protector for my mobile after being dumb enough to drop it on gravel. The hard cover took all the impact but the film protector on the screen was scratched badly. Was old and partially worn anyway so I decided to upgrade to a Tempered Glass screen protector. Being somewhere rural I had no chance to get one in a shop so I ordered online. With no intention of advertising for some sellers, I collected a few links so you can check what I am talking about: Item1 Item2 Item3 Item4 Item5 Item6 So, what is my concern with these? They all can be found on amazon and other online services as well as on local markets... As I said I ordered a glass screen protector. If you check these listings and even some of the packing you will notice they all have a thing in common - being shatter proof and of 9H hardness. I also love this video showing how to remove and fix a glass screen protector! The last time I checked glass had one very distinct feature: It is hard and before it really bends it breaks - unless you use fibre optics of fibre glass cloth... What is my concern and warning here? Pretty simple: Stay away from expensive scams! Some claim their screen protector is only 0.25mm thick, even the 0.2mm one I measured was over 0.5mm with the glue... The hardness of 9H refers to the so called Moh's hardness - look it up on Wikipedia if you like. That means these tempered glass protectors would have a similr hardness than a diamond, or at least close to it. Problem is that they are made from plastic to start with and not glass at all. They claims that the screen protector is flexible because it is so thin - again a fake! Even the thinnest tempered glass will shatter if you bend it enough, not so these plastic ones. If you think I am making all this up try to use a really sharp knife or deburring tool and cut the thin sides of one of these protectors. All the ones I tested could be cut quite easy - and I though glass can't be cut with a kinfe... A nice website showing that the scratch resistance is far from the claims can be found here. And a video showing how a real glass screen protector sounds and breaks can be found here. So is it really all bad and should I avoid getting one? Not really if it is only for the added protection. To be clear here, and without the intention to blame any of the above sellers, some protectors actually do have a top layer made from glass and you can hear it as in the above video - it sound solid and not like plastic if you tap it with something hard. Another factor is the simple fact that plastic absorbs impact much better than glass. So where a real glass screen protector might shatter and crack like in the above video, the fake ones might one get a nasty dint or scratch. But you should be aware and clear about what you get and what to expect from it. These glass imitations are made from a strong polycarbonate plastic, similar to the stuff used for bullet and explosion proof "glas" windows - if you every watched the Mythbusters you have seen the big sheets I mean. The top layer of these things is specially treated to repell water, oil and dirt, it also gives the surface the good scratch resistance. The technique is nothing new, camera lenses, plastic sheets and the clear covers you see over the timetable at your bus stop all use it. The new thing is to intentionally mislable a product to make the consumer think it is glass ;) What is the real difference for the user? Check this video. Here a guy performs a drop test with a real glass screen protector. Thing is once the protector breaks the screen itself is broken too but until then it was not too bad. Here it is demonstrated how a real glass screen protector reacts to certain types of abuse - one of the reason I decided on glass. Compared to the plastic counterfeits just the sound on the glass is worth it, but I think the hacksaw was best. Another video from XDA gives a bit more info on how the glass is made - if you can't seeing a phone being abused then don't watch the drop tests at the end ;) Glass with these hardness levels and types of surface protection will give the user a long and worry free use of the phone. The plastic fakes will perform at a similar level for some time but will show signs of wear long before even the top coat of the glass one fails. Both types have their uses and if the fakes would be labeled correctly the user would actually benefit from that. On bigger screens like a tablet I would actually prefer the plastic ones to prevent damage once it needs replacing. On a mobile used in less than perfect conditions I would also go for plastic as it usually is a bit thinner and will fit better within quality hard covers. But when it comes to real abuse like using with dirty fingers most of the time or mostly outdoors where a lot of dust and fine sand can be involved I always go for glass. If you paid attention to the surface treatment then you already realised that the plastic and the glass are in the same region, making them quite scratch resistant. Still fine sand or metal dust will scratch it.... The difference is in the hardness of the actual material that was covered with the oleophobic film. Glass will not give in any way, where plastic is much softer - so not to be confused with the surface hardness! This mean that sharp and point object will easier penetrate the plastic than the glass, something to be considered if you often ecounter harsh use. In terms of actual protection we need to differenciate between surface quality and actual screen damage. After all when badly scratched we can replace the protector but if the display got damaged we are back to square one. The surface hardness was already covered so let's move on to the screen itself. In some of the above videos you can see the abuse a screen might see in normal conditions, and if we would not drop our phones so often repair shops would not be at every corner LOL I have done quite a few screen repairs, mostly for friends and work mates that did not want to pay the hefty extras in a repair shop. From there I got the stories on how it happened and in almost all cases the screen cracked when the phone landed on the corners. In one case the screen and glass protector failed, including the actual display when the phone was dropped out of a 4WD and landed screen first onto a rock. A glass protector will spread the (direct onto the face) impact force onto a much larger area, where a plastic one will produce a dint onto the actual screen much sooner. So again glass wins in terms of actually protecting your expensive screen. But be aware that all this is useless if the phone lands on the corners!! Let me explain: Both the top glass on your screen and the screen protector have a thin layer of "glue". This acts like a shock absorber, so unless an impact goes deep enough so the pressure on the actual screen is too much only the protector should fail. But the screen itself is a tight fit into the frame of the phone, so all side and corner impacts go directly into the glass. As the rest of the glass has no way to give or go the stresses will crack the screen. How should I treat my phone with the new screen protector? Exactly the same way you would without it of course. But if you don't have a proper cover that offers protection of the corners you should invest in one. Having a quality protector and a good case does not mean your phone can be used as a football, see it as an added insurance in case something does go wrong. For obvious reason it can also pay off to have a spare at hand, if something bad happens that requires replacement of the protector you won't be left with an unprotected screen ;) Last but not least, double it up: For people that already know their screen will see a fair bit of abuse in term of scratches it is a good idea to put an extra film protector onto the glass one. Once it is too scratched you peel it off and replace it, while the glass protector gives you the actual protection for your screen. Corning Willow glass As time of wrinting Corning Willow glass is the only "flexible" glass on the market, unless stated with your flexible screen protector you can assume it will be just plastic. I did not list it above as this high tech material is mainly reserved for displays and at least to my knowledge is not available for screen protectors, although I will stand corrected as I have to assume some big players use it for their protectors. The material is actually a sandwich where an ultra thin sheet of glass stis bewteen two layers of durable coating, read it up on their website it is quite interesting. It won't reach the strength of their famous Gorilla glass so without an outer plastic that has the additional oleophobic coating it won't provide the strenght of real tempered glass protectors. Some phones like the Galaxy Round and the fleixble HTC phones use it for example.

Topic by Downunder35m 3 years ago  |  last reply 4 months ago


what is the size of my laptop screen?

 i have a hp dv8t with an advertised 18.4" screen it's got edge to edge glass and i want to get a screen protector for it.  i've searched but i can't find anyone that makes a screen protector for my computer so i figured i'll just make my own out of piece of screen protector the same size (simply missing the holes for the microphone and presumably the rounded corners on my screen).  HP's website lists the screen size as 18.4 " but it says it's dimensions are 17.16" wide (maybe i'm just reading it wrong) www.shopping.hp.com/webapp/series/category/notebooks/dv8tqe_series/3/computer_store .  There's the link for where HP has the specs for my computer.  If you can help with any of my questions, thanks!

Question by cdubnbird 8 years ago  |  last reply 8 years ago


Does anyone have a mod for the Canon PowerShot S3 IS other than the CDHK mod?

Like a protector for its lens, i saw one lensmate attachment so it would protect the lens system, is there like a ghetto version of it, or a poormans mod? :) Here is the lensmate attachment. http://www.lensmateonline.com/newsite/S2.html Thanks for any help!

Question by oginne 9 years ago  |  last reply 9 years ago


How can I create a "C-string" using a cup protector? (because it's underwear, maybe NSFW)

Hello, We would like to create our own "C-String". We already have a cup protector (athletes use this). Is there a way to make something so that the cup protector stays on despite gravity, or despite "size/volume changes"? (It's for a male). The person wearing this will be lying down. Thus, whatever we make the "String" out of (the part that loops around to the buttucks area) has to be comfortable. Perhaps there's a way to make use of the 3 breathing holes on the cup. ...

Topic by makerobot 6 years ago  |  last reply 4 years ago


Can I make a Page Protector a DS Card Case.... thing?

I've got a DS and I'm starting to get a collection of games. The thing is, I don't want to buy a lot of card cases that can only hold 3 or 4 games. Can I make my own with a page protecter? If so, how? Can I do it on both sides or just one? Should I add something in the midde?

Question by Kasanra 8 years ago


I've built a skateboard at school and have a problem with the kick wearing out?

I built a skateboard at school and the first time I rode the varnish wore off the kick. I want to make a kick protector out of somthing like nylon. How could I attach it so I can detash it again. also any Sugestions on how else I could do it? (if i cant do it without glue or bolts please still offer suggestions).

Question by David97 7 years ago  |  last reply 7 years ago


What type of helmet should i use for Mountain biking? Answered

I just bought a biking helmet from walmart. it is fashioned more like a dirtbiking helmet because it has a wrap-around chin protector. but i also have just a regular helmet.  I like the one with the wraparound chin protector but i am concerned that it will be really hot in there. Can anyone shed some light on this? any ideas about the two types of helmets or preferences would be great.  Thanks!

Question by yankeee7 9 years ago  |  last reply 7 years ago


How can I improve the quality of my instructable? Answered

Since I've joined instructables, I have made two instructables so far. My first one was featured on the homepage (which I was ecstatic about) but my second one wasn't. It did have more views but I would still like to improve how I write instructables. Does anyone have any critiques? Here's the link for the screen protector one (not-featured)- https://www.instructables.com/id/How-to-Make-Your-Own-Screen-Protector-for-less-th/ And the link for the phyllo dough squared (featured)- https://www.instructables.com/id/Delicious-Phyllo-Dough-Squares/

Question by jen7714 8 years ago  |  last reply 7 years ago


Uber-Nerd Proposal

"Nerd love at its finest, with a maximum allowance of creativity and a minimum of french kiss retainer entanglement or dual use pocket protector prophylactics."How will you top this one?Gamer proposes to girlfriend by hacking Chrono Trigger via: boingboing

Topic by scoochmaroo 10 years ago  |  last reply 10 years ago


Which Walkman to get earpieces from

Hello guys I need to make up one of the Jackhammer Headphones. Please let me know which Model of Walkman Headphones is best for me to get the Earpieces from. I have a Peltor Ear Protector. Thank you . Lynlin

Topic by Lynlin 3 years ago  |  last reply 3 years ago


Look at detail for preserving owl skull?

Si-yo, I am of wolf tribe with owl protector and hawk and am learning new things, How do I remove the eyes and flesh from an owl head to just have the skull for a totum stick, to present to an elder?

Question by unega wahuhi 7 years ago  |  last reply 7 years ago


what is this movie? I really wanna know? Answered

Its about this guy who works at a hardware store and he has a white car time machine and he goes to a time when there is a book that needs to be protected and there is skeletons that fight the protectors of the book and I just dont remember can anyone help?

Question by builderkidj 7 years ago  |  last reply 7 years ago


Where might I find corner protectors for a cargo truck (like U-Haul has), preferably in Utah?

I have this old cargo truck (I hope that's the right name, they're like the trucks/vans that U-Haul uses where it looks like someone took a big metal box and slapped a cab to the front) that I just bought and I'd like to fix up. I've seen other trucks like it with corner bracket things on them that protect the corners, and I'm hoping to find some after-market ones for mine. Plus I live in Utah, so I'd prefer a resource nearby (sorry, a Mom & Pop store in Japan won't do me any good). An online resource is okay too (preferably in the U.S.).

Question by Shesu 9 years ago  |  last reply 9 years ago


Best protection for computer... LIGHTNING

I've heard of computers fried in electrical storms, even with a surge protector. 1) Is there a better way to protect it, short of unplugging? a friend mentioned connecting it thru a bus, and letting the bus act as a fuse. I'm not sure what he was really getting at. 2) What are the odds? 3) experiences + anecdotes?

Topic by Toga_Dan 4 years ago  |  last reply 4 years ago


Krylon Spraydown

Mike from Instructables teamed up with Mark Clement from MyFixtitUpLife to reorganize their garage space to get it ready for winter & the upcoming football season!! Check out this awesome video where Mike and Mark show how Krylon Rust Protector seals and protects a variety of surfaces. Find more Krylon Spraydown projects here and check out the PDF attachments below for step-by-step tutorials.

Topic by Carleyy 4 years ago  |  last reply 4 years ago


How can I hole punch thin plastic page protectors in bulk? Regular punches don't work...?

Update: I found my answer, see comment below.  In short: I used a Carl Heavy Duty hollow-head Hole Puncher, and it works great! I've been using plastic page protectors (these, specifically) in bulk, say about 1000 a month.  However, I need them to be 8.5 x 8.5 and I also need to punch holes that are slightly off from the factory holes.  I'm basically using these as a cheaper alternative to 8x8 scrapbook page protectors (which are prohibitively expensive - say $1 a sheet or so). I've figured out how to quickly cut the pages (using a rotary cutter), and that works great.  However, I am still struggling to find a way to quickly & cleanly punch holes in these things.  The problem is that the plastic binds, stretches, and does not cut cleanly.  I need a very sharp & precise puncher to do this quickly, and I haven't found one yet. I've tried normal 3-hole punchers.  I can punch them one at a time, if I hit the punch hard, and occasionally it binds & sticks (since the plastic stretches instead of breaking and gets caught in the mechanism).  I've tried hand-held punches as well, same result.  Also, aligning each individual page is time consuming as well. The problem with paper hold punchers is that they're made for paper.  They're inaccurate, not sharp, but strong.  The cheap & heavy duty ones alike only differ in how much paper they can punch, but neither are sharp/accurate enough for thin plastic sheets.  Is there a high-quality razor-sharp & ultra-precise hold puncher out there?  I haven't seen any that look even close. I've tried holding them down & drilling them.  The plastic wraps around the drill bit and they rip to shreds. I also tried a leather punch, but the ones I got were much too dull - they just dented the plastic. The only thing that has had some success is a dremel 115 cutter bit.  That actually cuts into the plastic, and if I go carefully (eating a bit at a time) it'll go through a lot of sheets at once.  However, it's messy, takes a lot of setup, and leaves a very messy hole (all chewed up). Ideally, I'd love to line up 10 sheets or so, have a way to align them (a jig?), and then punch them all at once w/o any binding or sticking. Does anyone have any other ideas?  I've thought of melting a hole, but then the pages would all stick together.  I'm completely boggled - how can I do this?  What tool can I buy for this?  What method haven't I tried? Thanks guys!  Any suggestions are appreciated.

Question by jumpfroggy 7 years ago  |  last reply 7 years ago


RCA Rear Projection TV worked, took apart, put back together, doesnt work?

I have a RCA HD52w56 rear projection tv that was working fine and the coaxial input was broken off. I took off the back and soldered a new coax input.  However I think I mixed up the wires. Now, the tv does the old turn on blink green and turn off, no picture. In fact, one time I just plugged it into surge protector, never pressed the power button, and didnt even have the coax connected and the same instant the power in another room in the house when out but the surge protector the tv was plugged into stayed on. weird   Does anyone have a schematic diagram so I can check if I hooked something up wrong? Not Manual(preferably free, college kid w no money) Did I blow something? Everything was working before the coax got pulled out Thanks for looking and any advice is greatly appreciated.

Question by FSUWakeboard 8 years ago  |  last reply 8 years ago


OSIM uSqueez foot massager sparking how to?

OSIM uSqueez permanently dead. Dismantled unit found mother board 2A fuse blown. Check everything OK on mother board and replace fuse. Power on unit led under stop button light up. Pressed vibrator button works perfect. Pressed massage button strong sparking sound and saw fire in one to two second followed by blown fuse. 1. Measure the motor terminal resistance -> 0 ~ 5 ohms. Or it should should have some high resistance approximately 10 ~ 50 ohms. 2. Measure BR-B3D thermal protector which was in series with the black wire -> 0 ~ 5 ohms. Any idea which one is faulty part? 1. Think the thermal fuse is OK. 2. If the motor short, shall I do rewinding for rotor? Can't found this motor locally and if buy direct from OSIM too expensive! Any idea measure rotor coil? Thanks

Question by GearUp 2 years ago  |  last reply 2 years ago


salvaged parts: instructable ideas?

I found a nonfunctional UPS at a church yard sale and was able to salvage the following items: 1 class h transformer (about 5 cubic inches if that means anything) 1network transient protector plug-in 4 4 x 3 aluminum plate heat sinks 4 6v 11a gel-cell pb acid batteries and the circuit board may have some components that aren't fried too. anything practical would be great.

Question by harlyquin 9 years ago  |  last reply 9 years ago


Using a Rhino FXS Analog Chanel bank to actuate a relay

Ok so i've got a VOIP system that's connected to a Rhino FXS Chanel bank  that's used to control our overhead paging system. From the Rhino we go to a Volcom analog adapter to a Volcom Stacker unit (echo cancelation). Every once in a while this system will "lock up" and just throw static over the paging system (and even more rarely someone will put the overhead paging system on hold which pumps our hold music over the intercom system)...to combat this i've got the Rhino, the adapter, and the stacker pluged into a surge protector so that when the "abnormal condition occurs" we just flip the switch on the surge protector and it drops the whole system. then we turn it back on and all is well.This works great but the system is in a remote location in the facility so it takes a bit of walking to get to it. What i'd like to do is try to hook up a NC relay between the surge protector and the wall and have an open channel on the Rhino actuate the relay to basically turn the power off to the system any time you dial a specific extension.According to the datasheet the Rhino itself has a line current limit from 18ma to 45ma and it emits standard telephone line voltage....i can also configure the ring cadence...so i can probably set the ring duration long enough to actuate the relay before it cuts the system off (which would then return the relay back to closed)i'm having trouble finding out what the actual output voltage on the analog line and a general lack of schematics to try to make this workso...if anyone wants to have a little fun attempting to design a relay that can be actuated by a telephone...please reply

Topic by crapflinger 9 years ago  |  last reply 6 years ago


LED indicator

How should I drive an LED from a 38 volts power supply? The led wizard says I need a 1800 ohm, 2 watt resistor, but it also says' it'll disipate excessive heat. I recently took apart a surge protector and found that they drive an LED from a 120volt source by having a diode, LED and what appears to be either a 1 or 2 watt resistor. I need help driving an LED from a 38 volts power supply just as an indicator.

Topic by guyfrom7up 11 years ago  |  last reply 11 years ago


Rocketeer Rocket Pack, Ghostbusters Ghost Costume, Headless Horsewoman

Rocketeer Rocket Pack Ghostbusters Ghost Costume Headless Horsewoman Lego Indiana Jones Costume Bloody Cut Dessert Easy Leather Punches Spike Through the Gut Secret Message Shirt Large Roller Stamp Lady GaGa Costumes Salsa Fresca Fiber Optic Fairy Wings iPhone Screen Protector Prop Pulse Rifle DIY Calligraphy Instructables.com - 82 2nd St. - San Francisco, CA

Topic by randofo 8 years ago


Update! Nominating Instructables to be Featured Group

Hello again. A little background on the NIF (Nominating Instructables to be Featured) Group, it is a group where people can nominate their favorite instructables to be featured in the group profile page. Click here to visit the group. New members are always welcome. This time there is a lot of exciting news to report: Newly joined members!! Thank you for participating. I can't wait to see your nominations! Locket Rocket The Ideanator Goodhart Hiyadudez Also there are newly nominated instructables. Drumroll please! Living Tealight holder made from hard drive parts by ChrysN Personalized Cards by gergi11 Technology Making a brass pocket flask by Vidar_76 (nominated by The_Ideanator) How to Make Your Own Screen Protector (for less than a nickel!) by jen7714 Put images inside QR codes by killerjackalope Workshop Sugru Soft-Jaw Pliers by mattthegamer463 (nominated by The_Ideanator) Some more news: Instructables such as Cinnamon and Sugar Apples by miso_soup, DIY Calligraphy by mhudnall, and How to Make Your Own Screen Protector (for less than a nickel!) by jen7714 got featured by a feature team member. That means that they were actually featured on the homepage. Congratulations! (A note: I forgot to add this to the groups forum topic post. Is there any way I can add it now?)

Topic by SkysTheLimit 8 years ago  |  last reply 8 years ago


advice about timer?

I need cheap small timer to use in my device ( voltage protector) to use in control of warranty of 3 months, this timer will connect to led and when the time is finish (3 month of real working) the led will off, this timer should calculate the time of electricity working only ( if electricity cut off the timer not calculate the time when there is no electricity)  the timer continue calculate the time of working only is case of electricity is exist. when the total time of electricity on (exist) reach 3 months the timer will cut off the power on the led so will turn off the led

Question by rubellamarket 4 years ago  |  last reply 4 years ago


Flexible EL Display, Recirculating Gravy Fountain, USB Nintendo Gamepad

Flexible Electroluminescent Display Recirculating Gravy Fountain USB NES Gamepad Easy Backpacking Stove Spiced Pumpkin Cheesecake Letter from the Editor Glowing LED Tube DIY Thanksgiving Enter the RM 100 Contest Inner Tube Skull Purse Around the Room Marble Track Electronic Beehive Scale Xbox Kinect TV Mount DIY CMOS RAM Memory Guitar Neck Repair Blender Fish Tank Bottle Cap Antenna Protector Instructables.com - 82 2nd St. - San Francisco, CA

Topic by randofo 8 years ago


How to Repair Air Purifier Damaged by Power Surge?

Does anyone know how to repair an air purifier that has been damaged by a power surge?  I have several Cleanaire D2000 units - which are absolutely outstanding, BUT which have a weakness of being particularly susceptible to power surges.  Since they cost $400 apiece, it makes for a pretty costly power surge.  Are these kind of things repairable, and if so, where would I (or my technically-gifted friend) start?   I'd like to see if it's possible to repair one of these before going out and buying a replacement.  (Then the next step is to buy a good surge protector!) Thanks!

Question by Thaas12 4 years ago  |  last reply 4 years ago


how can i make a video projector?

How can i make a video projector for less then $80.00? i want the projected screen size to be about 1 meter across and exceptional quality. I'm mainly having trouble with finding a SMALL but HD screen. i also want the LCD to be about 5 inches across. it doesn't have to be exact, but i want it to fit inside a shoe box (hopefully cheep  =D  ). i did find on eBay a small, DVD player with an 8.5 inch screen with Analog Audio and , Composite inputs which might work. i also need help for LED's, preferably from www.superbrightleds.com can anyone HELP ME!!?!

Question by -max- 8 years ago  |  last reply 8 years ago


Who is Luke's REAL father? See details before you answer, PLEASE... Answered

OK, so when Anakin meets back up with Padme, he's been gone for ~1 year, right?  Problem.   Padme is pregnant, but hasn't delivered yet.  Logically, that means that Anakin is not actually the father.  Right so far? So who is Luke's real father?  Some random guy?  If we believe that the Force is a power that everyone has that must be cultivated, his father can be pretty much anyone.  If we believe the medichlorion count interpretation of the Force, however, he would have to have a powerful Jedi as a father.  Yoda has been Padme's protector, right?  I don't think I'll follow this logic any further.

Question by emperos 8 years ago  |  last reply 8 years ago


Still can't edit or unpublish old instructables.

1. Windows Professional 64-bit (6.1, Build 7601) 2. Google Chrome Version 43.0.2357.132 m 3. https://www.instructables.com/id/Penny-Screen-Protector-Easy-Doc-Camera/ 4. See attached photos. 5. From the above link, while logged in, I click "Edit" => "More" => "Private" => "Unpublish my Instructable and make it private!". It then takes me to https://www.instructables.com/id/private with the login screen, however I am still logged in as shown by my icon in the upper right. I have been trying to make this instructable private for three years now and I still haven't gotten a solution. I can't even edit the instructable to take out the content. 

Topic by JamesRPatrick 3 years ago  |  last reply 3 years ago


could someone cut a piece of plastic for me?

I have a mp4 player i got a few days ago, but i find that the original cover plastic has a sort of paint that, when combined with the glare of ambient sunlight, makes it totally impossible to use the player outside. not only that, but the plastic on the front got a really nasty scratch on it when i was cutting open the box. There isnt a screen protector on the player. if i gave the dimensions of the plastic part thats scratched (gold-silvery part of the player) could someone cut a new piece for me, be it laser cut, cnc milled, or by hand, whatever. all i ask is that its clear plastic. for those who would like to know the plastic is 1mm thick. if it could be done for free it would be so greatly appreciated.

Topic by zack247 8 years ago  |  last reply 7 years ago


An illuminated light switch that will work on 120/240V AC.

I have a fluorescent light fixture that my dad gave me, it was about 9 feet, so I cut it in half and re-did the wiring so it would fit on my workbench. It uses a plug to turn on and off. I know the wall switches they sell at home depot are rated for 120/240v but they are cheesy looking and hard to locate in the middle of the night in my garage. When I come home from work on my motorcycle, I need an immediate source of light. Is it possible to use an illuminated switch, say from, Oreilly's or Advanced Auto parts and add some form of surge protection so it won't blow or pop a breaker? I want to use the same concept as a surge protector, it uses an illuminated switch, but only cause its components are protected by the surge. Is it possible to make my own involving soldering components on PCB?

Topic by bprins 4 years ago  |  last reply 4 years ago


LED Lamp Buzzing (not a bulb)

About a year ago, I came across this LED lamp that was on sale at my local Target store. It caught my eye because it had a little tray at the base of the lamp along with a USB port for charging my devices. Since the first time I plugged it in and turned it on, it makes a buzzing noise. At first it didn't bother me, but now that I am spending more time at my workbench it has become annoying. I understand it is kind of common for LED bulbs to do this because of the dimmer switch being outdated, however this lamp is not dimmable nor is it a "bulb" so to say. It's about 7-9 SMD LEDs on a circuit with a rocker switch. If it makes a difference, I do have my lamp plugged into a surge protector and don't have anything plugged into the USB port located at the base of the lamp. What can be done (other than throwing it away, of course) to stop the buzzing noise coming from the lamp? Thanks in advance!

Topic by TXVisual 1 year ago  |  last reply 1 year ago


And the winner of the improvisation contest is...

I was just going for a walk, and what do I see? One of those heaters, as shown in the picture.  I immediately saw (pun and hint not intended) the switches, and was anxious to get them home. Unfortunately, I wasn't able to remove the connectors by hand, and didn't have and pliers or wire cutters.  I was 25 meters - less than 5 minutes away from home, and way too lazy to go back and bring some tools. What do I do? Look at the net/grill/cover/protector thing and immediately think that it's sharp and cut through the wires easily, DUH!  Not sure where I got the idea, but I thought that the side, where all of the smaller rods are welded onto the main one, would be pretty sharp. On a second thought, it might not have actually sawed through, but might have ripped through the wires, strand by strand, since it was soft copper. Just thought I'd b̶r̶a̶g̶ share :)

Topic by Yonatan24 2 years ago  |  last reply 2 years ago


Li-ion 5 pin, pinout?

Good Day Fellow TinkerersI have a battery that came out of a Android Tablet that i want to use for another project.It has a cuircuit board attache to the top which i would assume is a over/under charge protector and it has 5 wires coming off of that. 2 x Red, 1 x White and 2 x Black.The two black wires are connected to the same pad on the "protection circuit" and the two red are connected to the same pad. The white wire is on a separate pad i.e. 3 pads, 1 with 2x red, 1 with 2 x black and 1 with 1 x white.I figure the Red would be positive and the Black negative and then i would assume that the white is the Thermistor connection.My Question :How do i connect this externally from the tablet to charge? I figure red and black are the usual, but how do i connect the white wire?Thanks in advance for any help :)

Topic by GhengisKhan1981 11 months ago  |  last reply 10 months ago


This is Why You Don't Stick Fingers into Fans (WARNING: BLOOD)

WARNING BLOOD WARNING BLOOD WARNING BLOOD WARNING BLOOD WARNING BLOOD WARNING BLOOD WARNING BLOOD WARNING BLOOD WARNING BLOOD WARNING BLOOD WARNING BLOOD WARNING BLOOD WARNING BLOOD WARNING BLOOD WARNING BLOOD WARNING BLOOD WARNING BLOOD WARNING BLOOD WARNING BLOOD WARNING BLOOD Enough? Good. I am now working on a project that involves soldering. As usual I set up my extremely powerful fume extractor (I didn't make an I'ble on that, a different homemade one...).  I never put some kind of protector on it, and today I accidentally stuck my finger in one of the fans. If you're wondering whether you should put a guard on a fan, the answer is yes. Why? It takes a long time to type forum topics with one hand... "Nahhh... I'm going to be careful. Why would I even get my fingers close to the fans?" Picture are in the comments section, in case you want to learn what happens why half of your fingernail gets pulled off...

Topic by Yonatan24 2 years ago  |  last reply 2 years ago


Less then 2 yr old flat screen - has died....I believe...

My 17" Gateway flatscreen went blank this morning while I was at meeting. My wife claims she didn't do anything.....that it was blank when she saw it. It was not in sleep mode, nor was a screen saver on. I noticed the "power button" which is normally green (power up, with computer signal) or amber (powered up w/out signal), would not come on. I attempted to see if any of the adjustments on the side might have been bumped, no effect. I tested to make sure there was power from the surge protector (switched power outlets after a shut down) to no avail. After my 4th reboot, I subbed in my old monster sized 17" CRT tube monitor, and it works fine. Resolution is different, but it works.....but that pushed the monitor about 2 feet closer to my nose then I would like (it is about 10 inches from my face. )Did I miss anything as far as testing the monitor before replacing it? I personally think the PSU in the monitor went on the fritz, but I am open to suggestions. EDIT: The old CRT is now back ni it's storage area, and the newest LCD screen is up and running.

Topic by Goodhart 10 years ago  |  last reply 10 years ago


Digital Patches

You may be asking yourself (or everyone else around you), what are these "digital patches" I hear so much about? The answer is quite simple, digital patches are online greeting cards that you can send to other users which will show up on their profile page as a small picture icon. When you click on these little icons, it will display a larger sized image with a personal message explaining why the patch was awarded. There are a number of default images you can choose from, or you can upload your own.For instance, if you really like a project someone has posted, you can send them a digital patch to let them know how awesome it is.Or if someone subscribes to your feed, you can thank them by sending them a digital patch.Or perhaps you just want to send lots of people virtual cookies for a good time. You can use digital patches to do that too!Or if you want to start a club to honor everyone who has ever posted how to make a pocket protector, you can do that!Or you can use it as a way to say hello to old friends by sending them a patch with their two favorite things.Or perhaps you just want to brighten someone's day with some flowers.Whatever is your impetus, by signing up for a pro account, you can receive a number of digital patches to distribute as you see necessary.

Topic by randofo 9 years ago  |  last reply 8 years ago


I need a circuit to run a tiny motor from a USB port? Answered

I made a leather "Steam Punk" case for a portable hard drive. It has several gears that show under a glass porthole and I need a way to move the gears powered from a second USB cable. I'll use a separate USB cable then the Hard drive as I don't want to compromise the original device. I have a very small motor from some Radio Shack ZipZap RC cars. Tried to design a simple circuit myself but can't get the motor to spin. I suspect it doesn't have enough current. The motor does spin if hooked directly to a AA batery. The ZipZaps work with 2 AAA bateries in the charger/controller. The car hooks on top of the controller charges up and then can run for a short time. Opening the car up it has a 1.2 V 100mAh NI-MH battery inside it. Tried looking at a couple of BEAM robot solar engine designs used to run small motors from solar cells but just coudn't figure out how to convert them. I'm looking for a small circuit (in size) that could drive this motor, with a backwards current spike protector so the USB or computer doesn't get fried. I have limited EE experience but can through hole solder but not surface mount. -Steve

Question by nevets_mcd 8 years ago  |  last reply 8 years ago


300 Costume Making Help

I want to be King Leonidas from 300 for Halloween, but I don't want a cheap vinyl costume, or anything like that. I want actual metal..just having some trouble figuring out what all to do.Helmet - I've heard that aluminum roof flashing is easy to cut and work with..any ideas on how to make the skull cap/hair on top?(Mixing bowl suggested by Jessy)Cape - I'm going to take a deep red piece of cloth, cut up an old belt for the straps, and make some kind of clasp.Spear - Probably some conduit with a cardboard or possibly metal tip (how does one paint metal?)Sword - If aluminum flashing is easy to cut, ill cut out a blade, and then a plywood handle. JB weld the blade into the handle.loin cloth thing - I might take some brown shorts and bleach the legs...I think i'd be doing everyone a favor by not wearing a real oneArm protectors - Not really sure about these..any ideas?Shield - A Pizza panIf you have any suggestions on how to improve my ideas/answer questions, i'd really appreciate it. Thanks.Pictures:http://www.kultureshock.co.uk/v3/images/pi_18622.jpeghttp://imdb.com/gallery/ss/0416449/FCJG3000088.jpg.html?path=gallery&path;_key=0416449&seq;=21http://imdb.com/gallery/ss/0416449/FCJG300061.jpg.html?path=gallery&path;_key=0416449&seq;=67http://imdb.com/gallery/ss/0416449/FCJG3000044.jpg.html?path=gallery&path;_key=0416449&seq;=91

Topic by Weissensteinburg 11 years ago  |  last reply 9 years ago


Electronic repair after a voltage spike or power surge

So far I was lucky and never got a lightning strike or other power failure to induce high voltages into my house and equippment. But over the time I got several requests from friends to take a look at things after literally all connected electronics in their house got fried. In some cases there is only a total write off as due to a lack of surge protectors inside all unwanted juice made it's way into vital components. Like a brand new Samsung TV where the replacement of the power board was the only option - which makes you wonder... But in other cases, like microwaves, induction cooktops, computers and such I had some good success with the repairs. Guess it comes down to purs luck on both sides, power surge was not too bad and simple components on the input side failed quickly enough to prevent damage to microprocessors or other sensitive parts. Right now I have an induction cooktop here again that failed after a mains transformer in street blew up during a thunderstorm. I can tell it was bad as everything in the area of fried parts has a vaporizsed metal film on the surface and not much is left that was a surge protection. I cleaned all up, replaced the varistors and missing parts of the traces on the circuit board but the cooktop is not performing the way it should anymore :( At some stage during cooking it turns off with a meaningless error code stating the input voltage was out of bounds. So my next attempt was to literally remove every single component from the filter and power supply board to measure for any possible connections between the traces. By doing so I noticed several points where I had a quite high but measurable resistance in areas where there should be none. Mostly on the direct input side where the varistors tried to save things. So I used my Dremel in a tin drill press to cut the circuit board aourd the affect areas (where possible with a drill, otherwise with a thin grinding disk).. Sure enough I was greeted by charcoal colored dust in several areas. After removing all material until the dust was "clean"  tried again and this time all seems to work fine. I would like to use this topic to offer some help and guidance in case you have devices that suffered a severe power surge of some sort. Many of us either have no insurance to replace those items or even if you do the device might be expensive enough to try a repair despite getting it replaced. Trust me, even it went up in smoke there is still a chance to fix it in some cases and if proper protective circuits were in place the repair could as cheap as a few Dollars for replacement parts. To get useful advice the following things should be included in your request: Some clear pictures showing a close up of the affected parts - if there is visibale damage to be seen. A brief description of what happened, e.g.: lightning strike directly into the house or outside power lines, generator or inverter failure or simply that the power company stuffed up and your entire street was affected. Of course you will need the means to take the device apart for investigation and also some basic soldering skills or somehow how has and can assist you. But if you are up to the challange I am willing to help if possible.

Topic by Downunder35m 2 years ago  |  last reply 6 months ago


I want to Make a HUGE "3D printed" sculpture of a PACHAMAMA DRAGON with a drop fountain in it's eyes and a sensor smoke machine and more.(HOW CAN I DO IT?)

I have close to 0 pratical skill in arduino and raspberry,Questions: What`s the easiest way to make a sensor so when people are close to the head it starts crying in drops (maybe gold like liquid or glow in the dark liquid or red liquid)What`s the easiest way to make a sensor connected to a smoke machine? Where can I buy a drop water fountain?MORE IMPORTANT:What are the name of the professionals who can help me tech the dragon? does anyone knows cool things I could add to the dragon to animate it somehow?Maybe an entrance to put coins and money and some lights would light the whole dragon from inside, maybe a foam machine on the mouth or a flametrower.Is there any light that with a special bulb or opaque acrylic that stays smooth like a car`s neon and not localized when seeing it directly? how could i light the dragon in an epic way , having in account that the dragon has a rooted intricate body and we can put lights inside? maybe i can put the lights. Who is the professional who can put wholes for the lighting system and it-s wiring on the 3d model before we print it?______________________________________________________________________________________________I Will reproduce this model of this dragon (https://www.turbosquid.com/3d-models/3d-rigging-motion-paths-model-1150078) and MIRA ARTS RESHAPED SO IT LOOKS LIKE IT'S BODY IT'S MADE WITH THE ROOTS OF AMAZON,like this one(https://www.kickstarter.com/projects/mira-arts/forest-dragon) , rigged again in an epic way to fit inside a particular room along the walls, with a 2m wide head and an asian dragon body so it can spiral and swirl and curve around the room, like the walls are water, maybe even go behond walls outside and trough windows.it will have simple sensors so when you're close to the head it activates smoke machines there, maybe an "Ha" soundwith the help of architects, we will assemble the creature on site.I will reproduce it with around 500$ of cardboard sheets laser etched in topographical layers (PRICE) with the help of 123dmake (check it out), maybe then plastered and sanded down.like this tutorial until step 4. (https://www.instructables.com/id/Fine-Art-from-Cardboard/)with this system we can 3D print the dragon and anything imaginable at a Giant Epic scale!I'm going to kickstart this project ______________________________________________________________________________ _______________________________________ Fluff to save the World: I will name the Artpiece with a long name "Niu Pachamama Dragon :Bolsonaro, me muda o nome da Amazonia para Pachamama para ter um lugar mais visível no Google para salvarmos a Pachamama, vai!" or in english: "Mr.Bolsonaro (Brazil's President), can you change the name of Amazon Forest to just Pachamama so it can have better ,non confusing google searches and we can finally save it from ilegal deforestation?"Amazon has been unconsciously hidden UNDER Amazon Company IN WEB SEARCH ENGINES for too long,it doesn't have any clicks on search engines, it needs a legit different name for it's core to survive on aND PUMP the PLANET TROUGH THE internet.This way the company and the forest can coexist in different non intersecting google "cupboards" without any confusion for kids and adults alike.If the president changes the name OF aMAZON TO PACHAMAMA TROUGH THIS DRAGON SPLASH, we can bring tons of attention to Pachamama, the New Amazon AND POTENTIALY SAVE THE WORLD!.eCK!For 2020 WE CAN EVEN BE CELEBRATING 3SMAS INSTEAD OF CHRISTAMAS, WHERE INSTEAD OF TORNING DOWN A PINE TREE EACH FAMILY PLANTS 10 PLANTS!MERRY 3SMAS EVERYBODY, TREES MUST SURVIVE!THEI'RE ALIVE!The dragon has become a global symbol for epicness, Myth, entertainment fantasy monster,But the Virgin Amazonian Augmented Dragon or new Pachamaman Dragon CAN BECOME The transcendental symbol of good hope FOR PACHAMAMA,meaning, a guide to Brazilian politicians to "Get a legit Google cupboard for amazon RIGHT NOW!",protector of treasure with the TREASURE representing the Forests, specially the amazon, and hope that we can still save and act for all the forests of the world!a nEW PACHAMAMAit represents the fertility of the amazon, also IT'S deforestation,it's brutality, and future connection with mankind!iMAGINE THAT! and the dragon has an augmented DBZ scouter on the eye that represents the Good side of transcendental connection between human and machine(equals dragon, a symbol of leadership)(https://i.ytimg.com/vi/xiKcimY1iEc/maxresdefault.jpg) It represents the new transcendental connection with technology, you can have a google glass augmented "game" where you become an instant druid in the rainforest, with the camera reckognizing everyplant and medicine that you wish, and dosages for it, and where to get the next one for the recipes AND HOW TO PREPARE THEM.

Question by DIAGONALLIS 4 months ago