how much voltage a laser diode can withstand?

I would like to know how much voltage a laser diode can withstand with out damage to the diode?

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


Hidden Proximity Sensor

Hey guys, I am trying to find a method of creating a hidden proximity sensor that would work similarly to a laser i.e. if the line of sight is broken then an output can be achieved, but without actually using lasers. There are a few problems, the sensor will be in a dark space and will have some smoke blown through the line of sight (lasers would be seen). I want the sensors to be hidden, so they will have to be mounted out of sight, but as they will be used in a relatively open space, i imagine this will mean on the ceiling. This will mean that they will have to detect all the way to the floor, so the range will probably have to be at least 8 feet. Does anybody have any ideas? i'd really appreciate any input. Neal

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


circuit for multiple photo sensors and laser s to activate various solenoids.?

I need a basic circuit that will operate 12v solenoids via IR laser and photo reciever.  There will be 1 photo/IR per solenoid.    Thanks

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


How to measure the distance using laser

Hi everyone, so I would like to measure distance up to 12m using Laser ..the question is how to do so ? I want to make a simple sensor that can do the job.I know that for that i would need a reflector and the basic D=V*tso the problem is how to get the "t" !?

Topic by AbdChahidS 9 months ago  |  last reply 9 months ago


Where can I get a laser and a sensor? (preferably cheap) Answered

I'm looking for a laser that is button activated and a sensor that reacts to the laser. Basicly I want to put the laser in the barrel of a broken bb gun and make the button so that when you pull the trigger the laser goes off. Then I want to make a circle with the sensor in the center and when you hit it  with the laser you hear a sound. Now I am wondering where I can get a laser and a sensor that responds to it. the laser can be visible or invisible I don't really care. Also does the sensor respond to any laserbeam or is this specific? Thanks in advance, Michel

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


How to detect yellow school bus from 100 to 200 yards away? Answered

Is there any type of electronic component that I can use to build something to detect a yellow school bus that is up to 200 yards away? I live on a very straight busy road. From my mailbox I can see about 300 yards down the street before it curves. Is there something out there that would allow me to build a device, mounted to my mailbox post, that will chime a bell in my house when it detects a yellow school bus approaching from at least 100 yards away? Note that I believe it must have the ability to detect color because we also get a lot of big trucks driving by that could set it off if I were detecting by size. Just wondering if this would be possible. Thanks! - John

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


Pin-Pressions/ Rotation Sensor

I'm trying to build a sensitive pinpression device: one that can see 3d digital images. The device would be able to read, record and organize the depth of each pin. I think the first problem to overcome is figuring out a cheap way to measure pin depth. I think it will be best to do this with rotation sensors. Does anyone know how to build or where to buy cheap rotation sensors?

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


Laser Tripwire Turned Off By Laser Pointer?

I was playing through my older Splinter Cell games the other day, and had my airsoft pistol next to me. I had attached a laser pointer on it, mostly for kicks and giggles. While playing Splinter Cell, I turned off a security camera by shooting it with some sort of laser from my FiveseveN and it gave me an idea. I decided that I'd like to make a simpler version of this for a scenario airsoft game. So my question for you guys is, is it possible to make a laser tripwire that can be turned off by aiming a laser pointer at some sort of sensor on it? If so, how much would materials cost me, and how difficult would it be to assemble? Could it be pulled off by someone with little electronic experience like myself? Thanks in advance!

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


how do you get a photo sensor to turn on in the dark instead of in the light?

Is it possible, I am trying to do this so I can make a laser trip wire, but it turns off in the dark instead of in the light.

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


How to measure length of an object approx 10cm long within +-1mm by non-contact method, e.g modded flatbed scanner?

Objects are slender and about 5-10cm long. If it helps they can always be mounted in same orientation by placing them in a long V shaped horizontal groove for example. I currently am using a laser beam mounted in moving carriage of a hacked inkjet printer. When beam is broken carriage stops and stepper motor steps are counted. However this method is ugly and slow. Something like a glass surface I can place the objects on (such as base of a hacked flatbed scanner) would be much better and wipe-clean. By lining object up in same direction each time, only one row of pixels would need to be read for example looking for a sudden change of contrast. Cannot find any way to easily intercept output of a scanner on the web however, especially a more manageable single pixel as it scans across the length of the scanner. Alternative might be photographic, for example camera mounted under the glass surface, or even a moving camera to eliminate parallax error. Any suggestions gratefully received no matter how crazy. Thanks in advance, John

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


Laser detector array?

Hi ladies and gentlemen! I am looking to build a proof of concept, then a prototype on a laser detector array. I need a setup that will pick up a laser beam directed at it from up to 200M away. My idea was to use an array of photovoltaic cells hooked up in pattern. When a laser hit one or more of the cells the current would trip a relay that passed the current to a buzzer or alarm. My concern was that sunlight and ambient refection will cause false signals and trip the alarm. I am sure there is a way to set the system up so that the alarm only went off when there was a voltage spike in a single sensor, or put a variable resistor on it so that only light levels above ambient would set it off. The system will be deployed facing down towards the ground so direct sunlight should never hit the array. I would like to start off with a single photovoltaic cell to prove that the system works and then integrate the others to form the array. Thanks for the help!

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


IR trip switch sensor?

Hi all I have been looking all over the internet for the answer but got stuck I want to make a simple circuit to set up, so that when someone walks in between an IR beam or laser, and  a sensor, it triggers another circuit... Is there a useful instructable or a circuit diagram... I am really stuck.. please help Will

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


How to build circuit for (2) small laser pointers switched from one transistor used as a switch.?

I am building a device with two 5mW lasers 3.5 volt switched by a sensor and transistor switch. When both are in the circuit only one is on. what is the proper way to switch two lasers from one sensor/transistor?

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


interfacing with an old laser spectrometer

I attained a spectrometer and related parts out of an old Beckman Coulter CX7 instrument few searches of the pcbs result in usable information. I'm by no means an expert, but I can solder and have a lot of experience 'tinkering' and as an engineering student I would love to get this thing working.  The images I've attached are of the sensor and control board

Question by BlitzkriegBrain 3 years ago  |  last reply 3 years ago


Salvaging Toy Laser Gun?

I have these two old toy laser guns As Seen Here, Overpriced, and was wondering if anyone knows if there is anything worth salvaging out of it. The guns turn on and stuff, but the sensor to "reload" is on the blink, and even I can't set it off, let alone my 4 and 5 year old nephews. Thanks.Btw, what type of "laser" do you think it is ? An infared beam, like a remote?

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


How do I send data via lasers? Answered

I would like a flexible wearable material capable of receiving data via a laser. I would like the material to not be too affected by outside light and I would like the data transfer rate to be fast (it's only about 3 one-digit numbers I'm sending, so it shouldn't be a problem.) I am using this for a laser tag system, and the back, solders and front two sides is where I'm planning on these sensors being, so flexibility is not absolutely necessary, but would be very nice (being thin and durable, however, is necessary) please no lenses. I don't mind an elaborate setup, as long as it doesn't cost too much and uses minimal tools, but would prefer a simple "attach this to that then wire it to the controller" setup. I'll answer any questions on clarification to the best of my ability. Thank you in advance for any help.

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


Programmable / USB doorbell with IR or laserbeam sensor?

Hello all, I was wondering if anyone here has ever made or come across a programmable doorbell with motion sensor, either IR or laser. Like the ones in shops, but with uploadable WAV or MP3 audio. Preferably to build myself (with a little help) or if there is already a product similar to buy in the shops.Thanks in advance

Topic by chunkypies 11 years ago  |  last reply 10 years ago


IR laser detector alarm

With the new Infrared laser pointers etc. there is no way to tell if light is on or not. I think there is a need for a IR laser light detector that is small enough to fit in your pocket and could be clipped to your shirt. If a IR laser was pointed in your direction the sensor would chirp or make a noise. I've noticed several places selling IR laser pointers. I think they are dangerous and very little use for them, since they are invisible. Anybody want to make one? If you do I want one.

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


can anyone help me with a question regarding laser tripwires?

I need help! I'm absolutely new to DIYs and electronics etc but have always admired what people managed to put together on their own. So far i have only connected a computer fan to USB. I recently purchased a 'motion sensing' electronic guest saluting doorbell. it doesn't have more than a 5 maybe 6 feet range. anyway i wanted to make a laser tripwire with this (so it can also increase the range and work in the dark) so i experimented. A torchlight pointed at the sensor works fine so now i have a 'broken-beam' sensor. Getting fancier, i tried with a little cheap chinese laser, but it fluctuates too much and the sensor won't stop ringing due to the fluctuations in light! anyway, i need something with a steady beam that can keep lit for a few hours at a time - maybe some sort of laser that's plugged into an electric socket or some sort of battery? any ideas on what i can use? Thanks, people!

Question by whisp3r3r 6 years ago  |  last reply 6 years ago


Sensor that detects the height of your hand above a given point, ANY IDEAS?

... Does anyone know a sensor that detects the height of your hand above a given point? ... ... Or does anyone know a laser device that can detect the position of the hand above it? ... >.. I want to apply it on my Laser Harp idea, to control the Volume of the speaker. Mainly the idea is, the position of the hand above the device that produces a laser line will control the volume; if in high position high volume, if in low position low volume, etc. >. Tnx if you guys can comment, suggest, advice. XD

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


sending sound over light?

I have seen those thngs where you can send sound with a laser pen  i have an old sterio with a ir sensor and a laser pen i was wondering how i would go about making this thing  im not the best with eletrinics so need a dumbed down vertion lol      would the laser pen work with the or recever or would i need an ir bulb to

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


Walkie talkie motion sensor?

Alright, so I'm sure this isn't one of those ideas that very many will get super excited about... but I was thinking it would be cool to take a walkie talkie and put a motion sensor or event a breakable laser beam on it. In detail, the idea would be while playing paintball or something similar, you could plant it somewhere... once someone went passed it, it would use the alert function on the walkie (I don't know what the proper name is for that button, but it's the one that makes the obnoxious noise when you press it).  This would allow everyone on your team to know when the other team had passed that point. So, how would I tackle a project like this?  As an electronics newbie am I in over my head, or is this something that I could handle with a little messing around?  Ideas? Thanks!

Topic by xtraorange 9 years ago  |  last reply 9 years ago


How do I make a trip wire?

How do I make a trip wire? Additionally, how do i set up the trip wire to alert me from a remote location so that the intruder will not be alerted but I will 

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


Constructing a realistic lasergame

I am making a laser game/tag system and I would like an IR detector/sensor that can tell the difference between a direct hit and a near hit fly by so that the "bullets"can still cause sounds on a near hit. The sensor should be as invisible as possible but should have a very clear and acurate detection. If there is no way I can make it work I will tweak the guns to be louder. Guns will have to hit over atleast 200 meters "For snipers". I know I need a double-convex lens but I just don't know wich LED I need. It would also help if next to a focused LED there is a way to send an infrared signal in all directions for just a while "For explosives". I have looked at ad hoc but no idea if it would work in there. For the suits I will most likely use sensors connected to a micro-controller/processor. Oh I forgot to mention that I am not using infrared lasers because they will most likely burn or damage the equipment.

Topic by xpalix 3 years ago  |  last reply 1 year ago


measure distance with raspberry pi?

How should i measure 10 meter distance very accurately with raspberry pi ?  if anyone knows any sensor that can measure distance of 10 meter accurately please tell me then i will manage ? thank you.

Question by dharmik123456 2 years ago  |  last reply 2 years ago


BB Gun, shot counter? Answered

I am planning on using an Arduino nano (clone or similar) but am struggling to figure out how I can use a proximity sensor or other method to count shots fired... Am not sure if I could use IR, as don't know if it will detect a break at the velocity the BB's will be getting fired at.. When I get something put together am planning on mounting a nokia 5110/3210 in the butt so is visible, maybe a laser range finder etc.. Any ideas would be much appreciated

Question by sparks_vfr 5 years ago  |  last reply 5 years ago


arduino and 4051 IC?

I have followed your instructions in https://www.instructables.com/id/SNF-Drumming-MIDI-Glove-using-Arduino-and-light-se/ and I successfully. I now make the same project but with 11 light sensors use arduino uno rev 3 and 4051 IC. Please help me to modify the original code to work with arduino uno rev 3 and 4051 ICs. Thank you very much link about arduino and 4051 1. http://playground.arduino.cc/Learning/4051 2. http://miscellanea.com/how-to-get-more-arduino-analog-inputs/ 3. http://dawson-station.blogspot.com.br/2010/01/mux-demux-cd4051-parlor-tricks.html

Question by ylinggarjati 5 years ago  |  last reply 5 years ago


Does anybody know where to get a 315 mm ( -10mm) displacement sensor in the UK? Answered

A friend of mine is looking for a 315 mm displacement sensor (potentiometric). I've tried google but I can only find results over several hundred euro... On ebay I can only find very short potentiometers or expensive laser based sensors. Anybody know any alternative suppliers?

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


Laser Pointer shooting range ideas?

Idea is to slightly modify the annoy a tron circuit to turn on a laser pointer at a specific time interval, then back off... Then i would put this into my lego mindstorms robotic thingy that will point the laser to random points on the walllink to annoy a tron: https://www.instructables.com/id/Homemade_Annoy_a_thing_Annoy_a_tron/thats all great and a work in progress, really just background inforeal question, just askin, is what technologies are there that would allow a microcontroller to "sense" where the laser is pointing and then to link that info to an sensor that would find where the bb bullet hits? Then just give me a percentage of how far off i was from the dot, maybe in the form of an LED bargraph display like this one: http://www.goldmine-elec-products.com/prodinfo.asp?number=G8942this isnt something i expect to do, but i want to do something with 555s and this looks like a pretty cool ideato clarify, on the top part, the laser and lego mindstorms are 2 separate systems, one is simply mounted on the other, but by using the same timings it is possible to make them work synchronously... its a work in progress, stay tuned if interested

Question by raykholo 9 years ago


Audio Triggered by Light

Hello, I'm an absolute beginner and I would appreciate some help. I need to build a sensor that triggers sound either on Pro Tools/Logic Pro/Garage Band or any other kind of audio software when it detects a single red flash of light on it, much like the light a laser pointer would produce. The light will flash from left to right in intervals of 2.5 or 5 seconds apart. The sound is nothing too complicated. It's basically just single notes, pitched a fifth apart so for example, when the left light flashes, it needs to trigger middle C, then when the right light flashes, it needs to trigger G above middle C. Problem is, I do not know how to go about this and where to start. I would be deeply appreciative if someone could help me out here and point me in the right direction. Thank you!

Topic by shuraifa 5 years ago  |  last reply 5 years ago


Name those DVD Burner parts :)

Hi guys and gals, I just ripped apart a broken pioneer dvd burner of mine (digging for the laser diode inside) Apart from some nifty fans, motors, springs etc. I also came across these inside the reading/writing head of the burner. One definitely is a laser. But as often pointed dvd burners tend to have multiple (2) lasers. Now I wonder which of these items is the second one? All of the three upper items were pointing inside the head and (via some mirrors and lenses) towards the lens shown at the bottom of the photo. So they all seem to be involved in either creating or receiving (reading sensor?) of the laser beam. Hope some brave soul can give me some hints on these.

Topic by userman 9 years ago  |  last reply 9 years ago


Extremely basic laser tag setup?

I'm looking into building a cheap, easy to build, no frills (score, shot counter, reload, etc) laser tag setup. All I'm looking for are: - a modulated 40khz IR emitter, with a muzzle flash LED - shot sound (any easy way to do this with a piezo buzzer, or other really easy way?) - a receiver that sends the signal to a piezo buzzer connected to your ear I'm not gonna go for milestag, because it's too expensive to make my goal of 8 guns with, and I don't have the skills to make it (or time), but I will use its general emitter and receiver setup, just no fancy microcontroller. All I want is a "point and shoot you got me". I AM looking for a long range, though, equal to milestag guns, and for that I'm using its modulated emitter and receiver setup (to avoid sun interference... am I right?). So far I've seen this and this as for attempts at making something old school like this, but as electronic-circuitry inadept as I am, I can't put everything together easily without some help. I've included a photo of my schematic, created with the help of the above links and modified/simplified forms of the milestag sensor... please help with corrections. My primary questions are: - how do I add a sound output to the emitter? A beep is acceptable, but if there's an easy way to add a real shot sound, I'd go for that. - how do I limit the pulse to a short, like 0.25 second time period (I realize this was answered in one of the above links, but I need a circuit diagram or more noobproof explanation for it), then stop the beam? - how would I ground the LED (Vishay tsal 6100) and a non-ultrabright, red LED (the emitter output) in the emitter schematic (left)? Do I need resistors before the ground? - how would I add the piezo buzzer to the output in the receiver schematic? I'm using a Mouser part #  539-PT2130FPQ, in case there are resistors i should know to add. - do I ground the #1 terminals on the 3 terminal 40 khz receiver/demodulator? Originally, they would have been linked to the "data" wire on the milestag module. Please help a budding DIY electronics enthusiast out?

Question by MadBricoleur 8 years ago


How to get the right voltages to make a circuit with laser pointer, LDR and motor?

In short, it is for a uni project, and what I would like to do is shine a light (laser or white light) onto a prism that would have a LDR to detect the light and trigger a motor - the motor is attached to the prism to make it spin and refract the light to the next prism for a chain reaction mechanism to happen (I'd have 3 of them operating in a circle, maybe..) What I really need to know is what types of components to buy as there seems to be different kinds of every one, different voltages. (for example, how strong a laser do I need to be detected by the LDR, etc etc...) Don't want to fry anything! Thank you very much for you help! :)

Question by matisha23 7 years ago  |  last reply 7 years ago


How can I trigger an LED sign to turn on when an object is tossed into a bucket? Answered

I am designing a bucket with a small LED sign on it, and I want the sign to light up when people successfully hit a target in the back of the bucket. Everything has to run on battery power, and the entire product has to be mounted on a pole (which will be held in hand). I have considered motion sensors (Parallax PIR) and some sort of laser trip-wire (as one would find on a garage door system), but I am not sure how to implement either.  I have also looked into shock sensors, the kind used on some window and door security devices, however, I am not sure that the objects being thrown would be able to provide the shock needed (think toy cars, beaded necklaces and other small novelty toys). The sign will consist of up to 200 LEDS, and it would be nice to have it stay lit for a second or two before turning off again.

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


Find the inner diameter of the pipe whose inner diameter is varing in the range 0.5cm to 8cm?

I need to measure the inner diameter of the pipe the range of the inner diameter is 0.5 cm to 8 cm . what should i use ? laser ? or I.R sensors or anything else that  you can suggest ?

Question by thakkarjinal99 3 years ago  |  last reply 3 years ago


Arduino

Can any body make some sort of arduino device that shoots something at and intruder crossing a tripwire. I know you get those fairly simple set ups which consists of LED, a laser, buzzer and photosensitive sensor, but this would be interesting. Thank You Super Me

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


Replacing the 2N3904 with an SCR

So i made a laser alarm system some time back, it worked good but had one fault, more like a limitation. it made the buzzer ''buzz'' only when the laser was interrupted and the buzzer turned off when the laser was allowed to hit the photo sensor again. i wanted it to stay on until turned off by a switch. someone suggested something called a monostable flip flop but i had no idea what it even meant, then i saw something called silicon controlled rectifier or a thyristor, but i also learned that they have to be made using a pnp and npn transistor, what i cant understand is what transistors should i use to replace the npn transistor on my circuit, the tansistor on my cicuit is 2n3904, input voltage is 5v

Question by walee 1 year ago  |  last reply 1 year ago


I will pay you to make my Idea!

So basically I want a very simple device which is just a little buzzer and either some kind of laser sensor or even bits of string. I want something that can be worn that makes a noise when the wear slips out of good posture. I am sure this could be easily done. All quotes will be received and considered.

Topic by moogle123 6 years ago  |  last reply 1 year ago


What to Build

I have a bunch of parts here and no clue what to build, I have a: - EZUSB HX2LP LP USB 2.0 HUB 4PRT P/N:CY7C65630-56LFXA - NO DECRIPTION HERE P/N:CYDM128B16-55BVXI - LASER SENSOR TECHNOLOGY ONS1 P/N:CYONS1001L-LBXC - I have 2 ATMEGA168-20MU - I have 2 ATMEGA8-16PU What should I do btw I got all this for free

Topic by icanryme2002 10 years ago


Want more power! I have a several of late '80's World of Wonder "Lazer Tag" pistols, target sensors plus the rifle.

I know they operate in the IR area, but ever since I bought them, back in the day, I always wanted to modify them,amp the power, make the beam visible etc.  I am a noob here so any help would be great!  I love these things.  Thanks!

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


(newsletter) Gummi Shot Glasses, Powerthief, Glowing Coffee Table...

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"); } The brand new Klutz Rubber Band-Powered Contest is officially open to any rubber band-powered contraption! Enter now to win cool books from Klutz!Burning Questions is back with a vengeance with Burning Questions 7. Answer our questions and win the love of thousands, or at least a spiffy new t-shirt!Enjoy modifying the things you buy? Then check out the ThinkGeek Hacks Contest. Hack or modify any ThinkGeek item and win a $250 gift certificate to ThinkGeek!And of course, you definitely want to win a laser cutter!Enter any awesome project with a green twist in the Epilog Challenge and win an Epilog Zing laser cutter or gift certificates from Ponoko! Wave Laptop Stand How to Keep a House Plant Alive Make an Ikea-style Instruction Manual Homemade Annoy-a-thing (Annoy-a-tron) Win a laser cutter! Stretch, twist, and power something cool! Gummi Shot Glasses Musical Bra Make a Chainmail Shirt Powerthief Make A Tesla Turbine Fancy Desk with an in-built PC Hydraulic Ram Pump Plastic Smithing Let your geekiness shine! Get connected! Drill Press Laser Pointer Motion Sensor Cat Toy Glow Tank Coffee Table Paper Airplane Walkalong Glider Sign-up for this newsletter: function openSubscribePopUp(src){ var emailValidate = /\w{1,}[@][\w\-]{1,}([.]([\w\-]{1,})){1,3}$/ 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"); }

Topic by fungus amungus 10 years ago


What fun project can I do with around 300 Liconix high powered laser lenses Collimator ,optic lenses, Optic Filter..etc

Old Neighbor of mine was a Senior Laser Technician for Liconix about 10-15 years ago probably still works there. Anyhow he always would always be working on lasers Argon, Helium, Krypton, and his classic cars and overtime his family became sort of family to me. I would watch in awe as he worked trying to learn as much as possible. So I would help him work on his cars or Fix a PC for him here and there or take care of his son. I was only 13 at the time, but he was nice enough to give me a couple lasers for helping that his work was going to discard, some helium, Argon. I had to give the Argon back though because he sold his house and was moving to a better neighborhood. Plus it kept blowing the fuses in my parents'house from the power load. PGE was getting angry cause for some reason the street light sensors in my neighborhood were somehow getting burned out all the time *shrug* I don't know how and had to keep repairing them. Before he left he gave me some extra tubes for when my others eventually died. Most helium and tons of lenses of various sizes which are all tucked away in a box. In my dad's Garage of Death yeah he's a pack rat. But I found a couple of the lenses when I came to visit that I had sitting around the house and thought to myself time to dig the box out, so I'm slowly digging my way to it. Just don't know what fun project to do with all of it other than making a Laser Beam of doom or putting them on Sharks with fricken laser beams attached to their heads I also have a Fresnel lens from a 45 inch rear projection TV. Any Idea what fun project I should make with all of it ? I bet it would make one hell of a laser pointer for my Celestron GPS-GOTO C11 Telescope haha.Thanks for any idea's.

Question by Laser_PewPew 10 years ago  |  last reply 9 years ago


How to measure the distance up to 200m (with arduino)??? Answered

Hi ... how would you measure the distance up to 200m using the arduino ??? 1. What would you use ??? 2. Is it possible to modify the PING))) sensor to be able to measure such distance ??? 3. Do you think, that this radar kit www.hobbytron.com/r-sg7.html could me modified to do the job ??? There is a 'pdf' file for more information. 4. Or would you use laser - how ??? Thank you in advance for you answers/suggestions. zholy

Question by zholy 9 years ago  |  last reply 6 years ago


Need to build a device to measure verticals

What i need to do is possibly use lasers, i need about 30 of them around a half inch apart inside an aluminum pole or something. then i need a light connected to each one which will be at the bottom of the pole. After the beams are broken i need a sensor to light up to tell me the beam has been broken. this way an athlete jumps and once his fingers break the beam i know how high he has jumped without having to deal with the vanes in the current device. just push a button to reset it all. no messing with the pole or vanes or anything.

Topic by CoachChamberlain 9 years ago  |  last reply 9 years ago


Physical Space Installation Game

Looking for people who are interested in helping out on the electrical engineering side and/or set design of a installation game. Various people in the industry (theme parks and video games) should stop by during the exhibition and credit will be provided. On the electrical side it would be helping out with networking of Arduino boards to run each "gag" and be linked into a show control. On the set design side - help with the set design of the piece, lighting, and construction. The installation will take 3 players and have them "break into" a vault with various high tech security (lasers, pressure sensors, computers needing to be hacked, etc). Other examples of this type of work would be "The Tomb" and "Operation Spy" by 5wits, La Fuga by Negone (in Spain), interactive haunted houses, and theme park attractions. Message me if you have any questions. Thanks!

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


Thesis project engineering

Hello everyone, i'm in my fifth year industrial science, and next year I need to accomplish a thesis project. At the end of this year I need to find an interesting project, something that has to do with fysics, math, mechanics and electronics. of course its almost impossible to have a project that has to do with all of those subjects so you can leave some out. Has anyone some bright ideas? I've been looking but I have not found what I need yet.

Question by SimonG86 1 year ago  |  last reply 1 year ago


are high power ir leds dangerous? Answered

Im experimenting with ir motion sensors and im think i have a working model, but then i realized i would have a ir led on at almost 150 ma and i didn't know if that was safe, so i managed to reduce it to 10 ma and still work, but then i realized that if i didn't know how dangerous ir leds are, then any level could be unsafe for all i know (i came to that realization after i changed the circuit because im smart like that) i couldn't find any safety info on ir leds, just ir lasers, is there a certain power to distance ratio or anything i should know? aside from not shining it directly into my eyes (im not that far-gone)

Question by the judge 9 years ago  |  last reply 9 years ago


Feature Requests: Instructables Editor

Insert TablesCan we have an easy way to insert tables in an Instructable? It's a really arduous task to use the HTML editor to display information in a tabular form.Some use cases for tables: Parts & Material List - includes Part specifications, type, quantity, link, etc Electronic Connections - E.g: If an Arduino is connected to a sensor. The Arduino pins are in one column while the sensor pins are in another column. Explaining Code Snippets (see attached image)Embed GitHub Repository Maintaining code is made easy with services like GitHub especially if you want to make updates or bug fixes. You may have come across an Instructable wherein the code no longer works since it was based on outdated libraries & dependencies. It also encourages users to collaborate thereby keeping the code updated. You can also store electronic schematics, 3D printing files, laser cutting files, etc. Code SnippetsI know its currently possible to highlight code within an Instructable. Example:digitalWrite(led,HIGH); In the above case, the entire line is a code snippet.But what if my intention was to explain the function 'digitalWrite()' and instead only want to highlight the word 'digitalWrite()'.This is how it will look in the current editor:If the pin is configured as an INPUT, digitalWrite() will enable (HIGH) or disable (LOW) the internal pullup on the input pin.Just my 2 Rupees.#Feedback

Topic by Jonathanrjpereira 5 months ago  |  last reply 5 months ago


I have an idea for an arduino project, but I can't find anything that resembles it.

I had this idea for a spy gadget, but I cannot find out anything about some of the functions I want it to have. I wanted to take an arduino uno and first off give it an Infrared LED and program it so that it can drown out all infrared signals by continuously blasting IR when a button is pressed. A universal jammer if you will. Second off I want it to be able to use an infrared sensor to detect infrared light when the function is active, and display the intensity of such IR on a LED board. Third of all I want it to be able to activate a burning laser LED to help start fires when camping, a sort of laser swiss army knife if you will. Fourth I want to be able to stick turn on a small LED for light. I was looking to see how each thing could be activated by a different button. I have a Keyes KT0003 arduino kit with no instructions on how to actually use the thing. Aside from the laser LED which I know doesn't come with the kit, are the infrared based functions feasible? All I want with the infrared is to be able to detect it and then just drown it out completely with the LED, I don't want to block any specific function. I just want to block IR in general. I also wanted to make an infrared universal transmitter out of it, but all of the things I saw relied on the arduino as a receiver. I wanted to be able to use the arduino as a sort of sonic screwdriver, able to activate any IR based device and control it, by pushing buttons attached to the arduino. Like I said though, everything was using the thing as a receiver, I want to turn it into a handheld transmitter able to control anything with a IR receiver.  Here is a link to the kit I have, I'm sorry if it doesn't describe it very well. https://www.miniinthebox.com/kt0003-a-basics-starter-learning-kit-for-arduino_p1861302.html

Question by LMN1 1 year ago  |  last reply 1 year ago


Astronomer's Assistant

My next submission for the Create Scholarship is an outdoor one. And a night. I'm an astronomy student by education and I have had the opportunity to teach both students and the general public. One of the most frustrating aspects of showing folks where particular objects or constellations are located. Just pointing at it doesn't cut it. Unless you get real intimate in their personal space, they have no idea what you are pointing at. Informing them that, "Betelgeuse is the reddish-orange star right there" quickly results in, "they have colors?" I've used a green laser at star parties in the past with much satisfaction however, a shivering hand or a need for both hands for demonstration quickly makes it a hinderance. I would like to build a robot that continuously points at a selected object in the sky and follows it through the sky. The software would convert right ascension and declination and factor in date and time to provide the robot with the proper azimuth (compass direction) and altitude (angle above horizon) to aim with. The Roomba is great at rotating, so I would refine it and add a stepper motor with encoders for the laser arm. It would also have a tilt sensor to compensate for uneven ground. A red-lcd (for happy dilated pupils) display of all the pertinent information as well as object name would also be displayed. The hardware requirements are minimal as the database for popular objects would fit on most any memory stick. A remote control (wireless PDA or the like) for easy navigation and manual override would be also be included. I think most any amateur astronomer or educator would find such a robotic assistant indispensable. I for one can't wait to build it!

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