Cutting off the top of a light bulb

Hello! I'm having a problem and have ruined quite a bit of incandescent light bulbs over it: I need to open the thing just below the thread and I have no idea how. I've tried doing it with an X-acto knife, but it never breaks evenly, and usually, there are tiny cracks along the edge. Anybody out there have experience doing this and any words of wisdom? Thanks in advance :)

Posted by TashaDax 6 years ago


temporary video projector bulb fix

has anyone ever had a bulb go out on you while using your video projector and not had money to fix it i came across a way to temporary to fix it but i dont know if it will work for all projectors so im getting peoples opinion on if i should put this up as an instructable. please let me know what you think

Posted by kane89 8 years ago


Light Bulb Lamps

Oh what to do with the light bulb now that you're basking in the efficient glow of your CFLs? Well, you could convert them into these light bulb lamps as Sergio Silva has done. It's a pretty sweet item with neodymium magnets holding them in place on an included acrylic plate with embedded bits of steel.However, the price tag is $650 for the set which is pretty flippin' ridiculous for what can be remade with scrap and $10 of materials, if that. To be fair, the light bulbs Silva makes are sturdier than the regular item, are all made by the original artist, and are limited to a run of 66. So you're buying some design-y street cred before they get knocked off and sold for one-tenth the price. Linkvia bbgadgets

Posted by fungus amungus 10 years ago


Toshiba has stopped making incandescent bulbs after 120 years

Lighting has taken another step towards energy efficiency as Toshiba stopped making incandescent bulbs yesterday. It will now be focusing more on other lighting such as LEDs. This is all great news as incandescents wasted a lot of energy as heat instead of lighting. Now with a greater focus on the energy-efficient options we can expect to see quality and efficiency improve as prices come down. Lights out on Incandescent Bulb Production at Toshiba via inhabitat http://www.flickr.com/photos/laszlo-photo/ / CC BY 2.0

Posted by fungus amungus 8 years ago


Searching for new instructables!

Hello everyone! I am the founder of Light Bulb (Group) and am currently looking to finish placing all of the instructables related to the group. I have found all of the items worth putting on this group that were under the following seaerch terms: Light Bulb Bulb Right now I need help with LED and any other ones you can think of, if you finish off a search for this group, please post your search term here! Lukethebook333

Posted by lukethebook333 10 years ago


Giant Hanging Light Bulb Lamp

I'm wanting to create a giant hanging light bulb lamp, similar to the ones I've uploaded, but I'm not really sure how I would go about doing it. I think I would make it out of plastic. So I would need to create a mold and then make two halves on a vacuum form, but I have no experience doing that. I'm not sure how I would make a mold of a giant light bulb, what materials to use and how to make it. I had thought about maybe cutting something out on a lathe but I don't have a lathe and it seems like it would have to be pretty big. I also thought about paper mache but I was afraid it might be too bumpy and light bulbs are smooth. Also once I have created the vacuum form plastic halves how I would attach them together with out having a large seam show.

Posted by stuarttt 2 years ago


Is there any way of powering a light-bulb with usb?

Could you connect a usb cable to a light socket...? or would usb not provide enough power..? 

Posted by BradSabbath 2 years ago


Led light bulb uk

Hi , I wounded if any body would be able to help me out? I have been give a few led chip, all 10w 12v 900ma, have seen people make or replace lights in there house with 1-3w bulbs , but mostly there also in the us :(, and wounded if anyone could give me some light guided help   I live in the uk and would like to light my house on these if pos so if the first works ill have to make 9 more at least to change all my bulbs lol cheers and thanks :)

Posted by Xxxdvxxx 4 years ago


Tesla illusion ideas / wireless light bulb help

So I was considering going as Nickola Tesla for Halloween and showcasing his ideas as sort of party tricks...like a Tesla turbine blade and whatnot. But seeing as he is primarily known for electricity work, I thought it would be cool if I could somehow come up with a way to make a lightbulb glow while holding it. I tossed around the idea of running a powersource to a conductive glove to power it and also of making a self contained powered bulb but not sure. Any ideas on how to make some sort of electrical phenomenon illusion? Thanks.

Posted by jimijmarshall 9 years ago


Fish In A Light Bulb

So I was wondering do you think it would be possible to take an old ligth bulb hallow it out and use it as a fish bowl for a mini fish?  Im just not sure should I put a small plant in there and if so what kind of plant so maybe just a little air pump while Im gone.  Or would a small fish be fine if I put some rocks on the bottom and then just changed it once a month or so?  Or would it end up being every day do you think? Ethan PS I hope people dont bite my head off thinking Im a horrible person I just like the idea of having a fish in a light bulb I think it would look cool so Im asking before I do it and accidentally kill a fish...

Posted by mindstormmaster1 8 years ago


Small Lightbulb question

Hi there I feel ashamed to ask this question as it is probably so simple I have some small MES bulbs.. they have 6/8V 0.15A stamped on them I want to run them off a battery... on a parallel circuit... would 4x 1.5V batteries (6V total eg 4 AA batteries) in a battery holder work for them?? and would I need a resistor to stop them blowing?? (I am trying to run 3 bulbs in parallel for an instructable... best reply gets put in the credits at the end, but you don't get royalties lol!) any help welcome Will

Posted by IllegalFun 8 years ago


LED Conversion from battery to socket

I've found a few projects that touch on converting a standard light bulb to a LED configuration. But nothing that I have come across has a complete diagram for the conversion. I know that LED lights will last longer than most lamps and are much cheaper to run. But they cost upwards of +$20 each! Any help would be AWSOME!

Posted by Chef Chad McIntyre 9 years ago


Removing the stamp on a bulb

Hi!  Just a really quick question: Is there a way to remove the stamp on the bottom of a light bulb (you know, the bit that says the number of watts and the manufacturer) without damaging the bulb? Thanks for the reply.

Posted by TashaDax 5 years ago


Wireless controlled (bluetooth/wifi) dimming light bulb

Hello guys! I was wondering if there are dimmable light bulbs in the market that can be controlled over wifi or bluetoooth. I have an idea for a product and an app to control it. Can anyone help? Thanks a lot! Sam

Posted by samumar 6 years ago


temperature controller

I have a code that can increase the duty cycle of the pmw output to control the brightness of my bulb and i have lm35 conneted next to the bulb to sense the temperature and now my problem is i have to add two more additional switches for my gain and make the other two the setpoint of my temp,and i de an attachment of my code

Posted by PapaneE 3 years ago


Light project for a new room.

Hi everyone.My parents recently bought a new house and it turns out one of the rooms has no lamp connections whatsoever(Everything is ok, there just isn't any wires for the light bulbs).Because of multiple reasons we can't call an expert over so the job falls on me.I have experience in electronics but I'm afraid to try adding a route like the one that should be there so I'm searching for something safer :).All ideas are welcome :)

Posted by Hristo 9 years ago


led bulb dimmer

How to make a dimmer for led bulbs which are non-dimmable type?

Posted by allwynkumar 8 months ago


More Old Light Bulb Action!

Instructables users have inspired others yet again. Using LinuxH4x0r's Light Bulb Greenhouse and the dual homemade responses to the $650 Light Bulb Lamp--by bumpus and CYNICALifornia--as a starting point, Treehugger has added to the list of ways to reuse old incandescent light bulbs. Plenty of options to both make something useful and help protect the environment at the same time.Link

Posted by joshf 10 years ago


Mirror with 20 light bulbs

I am making a standing mirror with 20 light bulbs along the frame. Can somebody give me advice on how to wire it properly. What voltage should I use for sockets/bulbs? PS I live in Canada. 

Posted by Svet LanaN 1 year ago


Question on CFL and incandescent mix

This is weird, and occurred just the other day: For about 2 days in a row, while sitting at the computer, I heard a very high pitched whine. Naturally I thought it was the HD going, since it was about 8 inches from my head. The second night of this though, was giving me a headache so I pushed back from the computer to try to find which direction it came from. To my surprise, it wasn't the computer, but was at that frequency that it was hard to find which direction it actually did come from. Then, one of the light bulbs in the light fixture blew out and the whine vanished. Background: the fixture has 2 bulbs in it, one was an incandescent bulb, one was a CFL. The bulb that was complaining so loudly, was in fact, the incandescent bulb. They are wired in parallel, so the other bulb (CFL) continued to light the room after the one bulb failed. The question is this: Is it unwise to mix bulbs like this (I only did it because I only replaced the one burnt out bulb with the CFL) ? Did the CLF cause the filament of the incandescent bulb to vibrate at I high frequency and finally burn out? Or was this all just co-incidence?

Posted by Goodhart 9 years ago


midflex idea bulb

I was in my quantum class today taking in some nice Schrodinger equations. The professor was having a hard time figuring out which students were understanding the material. I thought to myself, "Wouldn't it be nice to have a consistent way to show the teacher you understood." So then it hit me... why not have a classic idea bulb on top of a hat. You could push a button and it would light up. Thus indicating to the teacher that you understood the material. Simple enough, but kind of annoying to push a button every could of minutes. Why not use the new Mindflex toy to gauge your understanding of the material? The user could wear the headset like usual. Instead of controlling a ball like in the game, a sudden decrease in concentration (the realization of an idea) would turn the light bulb on. The electronics should be simple enough. It would obviously be better to use an LED instead of an actual light bulb. I would build it myself, but I don't want to spend $60 on a mindflex game. What do you think? Elijah

Posted by Mirage_662 6 years ago


Bike Lighting - Pedal-Powered 60W Incandescent Bulb?

I know, I switch projects a lot. I just can't stay focused on one thing for too long.Anyway, here's my idea:There's a local museum called Fort Discovery, which, by the way, is quite cool. But, there is this exercise bike they have there, and connected some how (I haven't been there in a while) is a few different home tools, like an incandescent light bulb, a drill, a hair dryer, and something else. There are switches, so you can turn whichever ones you want on, to see what you can power. The "exhibit", if you will, is to show how work = power. Now, I'd like to try to hook something like this up, except a few things will be changed:It would be a regular, moving bike.There would only be a light bulb.I want the power to be stored in a capacitor, because what would be the purpose of having a light while riding in the daytime?Now, besides from the point of me not knowing at all how to hook this up, I wonder if there would be a capacitor that would store enough power to light the bulb for a reasonable amount of time, if say, I used a 60 watt bulb. Then of course, I have a few questions, some of which I may of already said:How big would the capacitor have to be hold enough power to light the bulb up?How many hours (or minutes, if applicable) of moderate riding would it take to store enough power to light the bulb enough to see for about 15 minutes?Would the power stay in the capacitor so that I could charge the bulb a bit over the course of a few days?How would I hook such a circuit up?Could I hook the circuit up so that the power is stored from the wheel going around, rather than my pedaling?Thanks for any and all help, and if this turns out all right, then I may just put an Instructable up. I guess I'll have to see. Thanks again!

Posted by Bran 11 years ago


Is Ikea the only place that recycles incandescent light bulbs as well?

CFL bulbs need to be recycled properly due to mercury content, and there are many places: Park districts, hardware stores, Ikea, etc. that recycle CFL bulbs. However, I haven't found any place that recycles incandescent bulbs, I searched online and they say, they don't contain any toxic chemicals and can be thrown in trash and not curbside recycling. However can't the glass be reused to make new bulbs? I am sure they can reuse the glass, and the filament is probably too hard to recycle but the glass could be. I know Ikea recycles incandescent bulbs as well, but why aren't there any other companies that do? Also LED bulbs, I guess dead LED bulbs can either be returned to manufacturer if it has warranty, or in electronic recycle.

Posted by ADRIANT28 1 year ago


Hand-blown Sculpture Amazes, Illuminates

Take a good look at these crazy and beautiful hand-blown light sculptures. Prices are in the range of $200 - $1,300 and look like they're not recommended if you have small kids in the house, but hey, they come with a free filament replacement. artist pagevia BoingBoing

Posted by fungus amungus 10 years ago


[newsletter] Light Bulb Lamp, Predicting the Weather, Chocolate Speed of Light...

June 19, 2008 Sign-up for this newsletter: function openSubscribePopUp(src){ var emailValidate = /\w{1,}[@][\w\-]{1,}([.]([\w\-]{1,})){1,3}$/ if(emailValidate.test(src.value) == false){ alert("Please enter correct email"); return; } window.open("/newsletter/newslettersignup?email=" + src.value,"newslettersignup1","status=yes,scrollbars=yes,resizable=yes,width=420,height=250"); } Welcome back! Want to put some insanely cool, lights on your bike? Then enter our Let It Glow! Contest. The prizes are super sweet and blinky, so enter before the contest closes this weekend! RoboGames 2008 is over for this year, but you can still enter our Robot Contest to win a trip to RoboGames 2009! Air fare, hotel, and entry fee are included!Winners have been announced for the Discover Green Science Fair for a Better Planet Contest. See who won, and bookmark some Earth-friendly summer projects! Check out these cool Instructables! DIY Vinyl Wall Art Liven up your apartment, without risking your deposit, by putting up some slick-looking ConTact paper designs to decorate your walls. posted by britsteiner on Jun 17, 2008 How To Measure the Speed of Light... Using Chocolate! Enjoy some gooey warm chocolate and learn some science at the same time! posted by bradpowers on Jun 13, 2008 Building Small Robots: Making One Cubic Inch Micro-Sumo Robots and Smaller With only cubic inch, you'll learn to be efficient in your robotic design. posted by mikey77 on Jun 12, 2008 How to make a piano keyboard Build piano keys from raw materials and make a piano you can truly call your own. posted by threesixesinarow on Jun 19, 2008 Steampunk Style Fan Cool off in neo-Victorian style with a custom built fan. posted by reluctant_paladin on Jun 13, 2008 Steel Centipede Turn that scrap metal and chain into a unique sculpture with nothing more than a welder and a bit of creativity. posted by Mikey D on Jun 15, 2008 LED matrix using shift registers Play with patterns of light and display messages on a custom LED matrix. posted by barney_1 on Jun 15, 2008 Predicting the Weather with Clouds Learn to understand what the sky is trying to tell you. posted by randofo on Jun 12, 2008 Instructables Robot -- Paper Model Print and cut out this template to make a papercraft robot of your very own! posted by =SMART= on Jun 13, 2008 Central Vacuum Retrofit Install a central vacuum system in an existing house to have quieter vacuuming and an external exhaust. posted by a.doovz on Jun 13, 2008 Rock Band Guitar Stand/Drum Support Tidy up your virtual rock star gear and keep your drums steady with this PVC setup. posted by evilbunnee on Jun 12, 2008 Win great books for your travel tips! Closes on June 29! Winners are up! Animating Multi Layered Engravings Take glowing etched acrylic to the next level with animated frames. posted by japala on Jun 18, 2008 10-minute electronic leather band Enhance a leather bracelet with a flashing light that can record and play back patterns. posted by craft-tech on Jun 14, 2008 The Lucid Dream Machine Control of your dreams with the power of flashing lights. posted by guyfrom7up on Jun 18, 2008 SketchUp, Inkscape, and Ponoko Laser Cutting Install this plugin and you'll have a free way to design in 3D and export your files to be laser cut! posted by flightsofideas on Jun 19, 2008 Light Bulb Lamp Put your dead bulbs to use by turning them into stylish oil lamps. Just be sure to put them in a safe place. posted by CYNICALifornia on Jun 14, 2008 Now go make something awesome, and I'll see you next week! - Eric Sign-up for this newsletter: function openSubscribePopUp(src){ var emailValidate = /\w{1,}[@][\w\-]{1,}([.]([\w\-]{1,})){1,3}$/ if(emailValidate.test(src.value) == false){ alert("Please enter correct email"); return; } window.open("/newsletter/newslettersignup?email=" + src.value,"newslettersignup2","status=yes,scrollbars=yes,resizable=yes,width=420,height=250"); }

Posted by fungus amungus 10 years ago


I'm making a lamp...

Hello Instructables community! I'd like to make a desk lamp, and I'd like to plug it into a wall. Now here is my dilemma I have, the lamp would have 9 main lights inside glass globes and I'd like to have small little lights (like LEDs) around the outside like little points of light. Now in my experience LEDs aren't typically plugged into the 120V wall socket. I have a friend who's good with electronics who has tossed around LEDs, fiber optics, etc and it's all just mind boggling to me. He's even suggested using some kind of controller to make the small lights twinkle and I have no experience with that kind of thing. I'd appreciate if I could get some input as in what options I have for lighting this lamp. Right now it sounds like a valid idea is to use "super bright" LEDs for the 9 big lights and just regular LEDs for the multiple points of light around it.  I can provide as much additional details as needed. Thank you for any input.

Posted by hzillmer 4 years ago


Voltage Drop

I have a 12v led bulb, I need to connect the led bulb to 12V rechargeable battery  and connect bulb for  long distance from battery and i connect the bulb i won't  work, i think the voltage drop would be the  answer and how can i solve that????

Posted by rshan 4 years ago


Hot bulb stirling engine dimentions

I am going to make a hot bulb sterling engine and am unsure about the dimensions of any of it. If anyone can help, please do.

Posted by DELETED_robobloke 4 years ago


Use guitar amplitude signal as a switch to light a bulb

Hello,  I'd like to light a bulb by using a guitar as a switch. My problem is I don't know where to plug the guitar into. Is it some kind of switch I have to tweak, or is it some kind of resistor. I've attached an image to explain the electric circuit. 

Posted by davcoccio 4 years ago


need help finding special bulb 60v2.4w

Ive been making a project out of a night-light, but i need to replace the bulb but its a type thats been very hard for me to find. this is the only place i can find it; http://www.atlantalightbulbs.com/ecart/nw012104/B3064ORBITECH.htmdoes anyone have any suggestions on where i can find this bulb without buying 20 of them?or perhaps how i might modify my project to accept a more common bulb?

Posted by synthetic_iron_oxide 11 years ago


CFL

Who else uses CFL ( Compact fluorecent Lightbulb) I my self replaced all my rooms light with them, so 4 bulbs in total. They sell them at Sams club, 8 CFL units that replace 60 watt bulbs for about $10. Instead of using 60 watts they only use 13, also they do not get as hot making your room cooler in the wee hours of the morning. Im not sure if they sell them for the smaller bulbs like the skinny ones ceiling fan, because thats the kind of bulbs we have on our wall. I decided not to use that light for now. Most of all the light bulbs in our house are fluorecent, except the bathrooms, a few lights we use rarely and the 3 different intensity bulbs. Who else uses CFL and if you don't, do you want to switch?

Posted by acer73 11 years ago


Battle of the Bulbs!

Whilst looking through the recent -ibles i saw CYNICALifornia's variation to the light bulb lamp. Running, er, clicking as fast as I could, I got to the home page and saw that his -ible was featured as well, as I scanned the page I saw, parallel to his, My -ible! IT'S ON!!! not really, I just thought it was funny that they were both featured, almost the same -ible, and right next to each other..

Posted by bumpus 10 years ago


ECONIMIC LIGHT BULB HELP

         I've started changing the light bulbs at home. I want to use economic ones like the one in the picture. The only problem that I have is that when I turn off the light , the bulb starts blinking. I have a power switch similar to the one in the picture. It has a little lamp behind the red dots that goes on when you turn out the light. It helps you find the switch in the dark. I heard from someone that the blinking is related to this lamp. Does anybody know how to fix this? without removing the little lamp in the switch

Posted by ZoDo 7 years ago


Some LED Projects !!!

. You can see my LED Projects: https://www.instructables.com/member/pandyaketan/ reg ketan

Posted by pandyaketan 7 years ago


Burned bulb detector / switch

Hello to all instructable community, I was trying to find a device that would detect when a bulb is burned and will switch to another lamp. The lamps I am using are 25Watts ac bulbs. I tried to Google a bit, probably didn't search the right keywords, but I couldn't find anything that does what I want. If you got any idea what i am talking about please reply. Thanks to all Omar

Posted by omarharoun 10 years ago


Battery powered 120V light bulb

I'm trying to build a steam-punk costume and wanted to use a motorcycle battery to power several edison squirrel cage style bulbs. Fortunately these blubs look better if they are dimmed, but what I'm having a problem with is a schematic and what type of transformer to use.

Posted by Deepeyes 6 years ago


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.  

Posted by Buzzsushi 8 years ago


Diffuse or direct bulb light for an area.

Http://img.alibaba.com/img/pb/891/178/257/ws_transfer_pic_7849270_1.jpg Say that you had a 5W led and you wanted to light a small room, would it be better to use a bulb with a clear / no dome or one with a diffuse / frosted dome? Would there be a big difference between the two?

Posted by Full Metal 4 years ago


Waterproofing LED bulbs.

I want to use LED bulbs in my turtle tank, but it MUST be waterproofed. I plan to pun it off 12V, with a resistor. I'm not going to run the 12V cable into the tank, I'm going to place the resistor outside the tank with it's own cable going to the LED. Any ideas on how to do it?

Posted by Josho 10 years ago


120V LED Under Cabinet Lighting

Hello everyone. I recently purchased a new home, of which has some nice Under cabinet lighting. But they are extremely hot when I use them. Heat = wasted energy right? I want to be as Green as possible in my new home. The problem is, the Bulbs are these weird straight 120V Bulbs from Westek.http://www.servicelighting.com/Westek-00862-LB25B-25W-120V-HALOGEN-Double-Ended-Halogen-Incandescent-Light-BulbSo, the question is, Can I some how make an LED replacement Bulb? Each housing has 2 of these bulbs, and I have 4 of the housings. I can't read schematics, but any info would rock. Thanks everyone.

Posted by Leejin 9 years ago


9W Fluorescent U-Tube Bulb w/ 6V 4Ah Battery

Hi Guys! I would like to create a sort of emergency light with the following... 9watt fluorescent u-tube bulb 6volts 4Ah sealed lead-acid battery HP AC Power adapter (input : 100-240v | output : +32volts 625mA I'm not really good with electronics... please be so kind with me :)...  I'm wondering what will be the things needed here to create the following battery charger and to power up the 9watt bulb Thanks a lot in advance

Posted by acl_20032003 4 years ago


desoldering iron

I am thinking of purchasing a desoldering iron, because braid gets annoying, and i was looking at one at radioshack, its just a soldering iron with a hole in its end and the hole leads of a mounted bulb. i was wondering how they work, the iron heat the solder, and u press the bulb and it sucks the solder, but where does the solder go? into the bulb? how do you get the solder out?

Posted by um0123 9 years ago


Circuit Diagram for LED bulb running on 120V AC

I have been watching a lot of YouTube videos of building your own LED bulb using a scrap CFL bulb. Since I have watched a lot of those videos, I want to build one. However, almost all of those videos are about making one that runs on 240V AC, and where I live I use 120V AC. Take this video for an example: I also noticed that in that circuit diagram, there is a 5th diode that is unnecessary. So I want to build an LED bulb similar to that one in the video above. But I am not so good with electricity, so I am not so sure how I can modify the circuit so that it will run with 120V AC instead of 240V. Can someone help me with this?

Posted by ADRIANT28 1 year ago


Is it possible to use a CPU fan to generate electricity to power an incandescent electric bulb?

Okay, I have to make a  model of hydroelectric power generator. I know that a DC Motor can produce only AC current when its rotated. But as far as I know AC current can power an incandescent electric bulb. So,Is it possible to use a CPU fan to generate electricity to power an incandescent electric bulb?

Posted by mroy9 6 years ago


Adjustable bed remote fix

I  will have to throw away, at much expense,  and replace a terrific adjustable bed because no one seems to know how to fix the remote control broken red bulb.  After a trip to and from the supposed specialists in WinstonSalem N.C., it came back with NO bulb, and both a screw and a small piece missing!  When I called, he informed me it was working when it left there... How would he know WITHOUT  the bed?  Top that with him insisting it 'doesn't NEED the bulb to work'.   Any advice on what bulb  for a 9 volt, and precisely how to know circuit board terminals ?  

Posted by 10TanToes 1 year ago


Can I reprogram this?

This is for a LED USB BULB, can i reprogram it?

Posted by SelinA4 9 months ago


Control bulb with inductive proximity sensor

Please see attached diagrams in my other message below. I am using an NPN NC inductive proximity sensor (specs attached) to control a light bulb. The bulb is normally on and goes off when metal is detected. It is a 12v/21w bulb, powered by 12VDC. I have placed a heat sinked TIP120 NPN High Power Darlington Transistor 60V 5A TO-220 , a 2.2K 0.25W resistor and a 560R 0.25W resistor as shown in the circuit diagram on the right. Please ignore the left diagram for the LED. voltage readings for sensor with no metal detected: Between brown and black: 12.06/07V & -12.03/04V. Between blue and black: 0.0033V & -0.0032V (3.3mV & -3.2mV)  with metal detected: brown/black: -0.6/7mV & 0.7mV  Blue/Black: 11.96/97V & -11.93V Although the sensor is powered and detects metal ok, the bulb stays on. The polarity of tIP120 is correct and gives out heat ok. I can't figure out what I'm doing wrong so could you please see an obvious error?? thank you

Posted by nathanimate 3 years ago


How to add 2nd battery to circuit or increase voltage

I have a Normally Closed NPN inductive proximity sensor which operates at 10V. I use it to control a load (light bulb), which is normally on, and goes off when the proximity sensor detects metal. The problem is that I need to work with portable batteries, or something like an acid battery, and ideally not exceed 12V for safety reasons. Since the sensor needs 10V to operate, this only leaves me with 2V for the light bulb. I need to increase the voltage to the light bulb so that I can use a decent light source. Is there a way of adding a 2nd battery to the circuit so that the bulb has its own power source, yet that too is controlled by the sensor (otherwise the bulb would just stay on continuously). Any other solution would also be appreciated. Current circuit diagram attached. Thank you.

Posted by nathanimate 3 years ago


how to make this device?

Hi, i want to make a device, please tell me how... there is something that looks like a tv remote . it has 9 buttons on it. And there are 9 light bulbs. when i press each button, each of the 9 light bulbs should light up. for example, when i press button 1, light bulb 1 should light up. when i press button 2 , bulb 2 should light up, button 3 turns on bulb 3, and so on. this needs to be wireless. i have done some research and i have found that i need something called an RF transmitter and RF receiver. I just need some hints on how to make this device. i hope it is clear what i want , english is not my first language, if its not clear let me know and i will clarify.

Posted by create90212 10 years ago


Wiring a 3 bulb lamp

I know this is basic, but I'm not familiar with wiring anything that could potentially burn the house down so I feel its better to ask. I'm wanting to wire up three lights to go over my basement workbench to all work on the same switch. The image shows what I planned to do, was just wondering if there an expert out there who could tell me if this is going to be safe? Would 60 watt bulbs ok?

Posted by REDnumber5 8 years ago