Search for contrast in Topics


LCD contrast issue?

Just got a LCD 20X4 character screen. 10K pot connected to 5V. Can controll contrast. problem is, only 1/2 of it???"--------------FADED----------------""--------------DARK------------------""--------------FADED----------------""--------------DARK------------------"only 2/4 rows of character blocks go dark when full contrast. why is this!!!

Topic by Killa-X    |  last reply


Arduino LCD display contrast

My LCD display is acting up. Whenever it transitions, there is a weird afterimage. i have tried turning the contrast up and down, nothing helps. Has anybody experienced this and know how to fix it?

Question by JohnM703    |  last reply


how do we perceive contrast in colors?

Does the human eye see more constrant in specific pairs of analog colors, comparing to other pairs that are equally (matematically in RGB) contrasted? looking at the triangle in the image, how do you feel the contrast between pairs of analog (neighbor colors)? are there pairs that are more constrant than others?

Question    |  last reply


Sexy Black w/Red Contrast Stitching Pencil Skirt! For Sale!!

Hey check out my pencil skirt slideshow! This skirt looks so hott on, but when i made it i was ten pounds lighter, never even got to wear it out! Soooo, now i have to get rid of it! I have it for sale on artfire.com http://www.artfire.com/modules.php?name=Shop&op;=listing&product;_id=636541 check it out! its womens pant size 0-2 equivelant, its a nice mid-weight stretch cotton with a wider waistband. Theres 2 zippers in the back one at the top and one at the bottom to control 'hobble'. It sits slightly higher on the waist and the dark red contrast stitching at the hem and around the zippers really makes it pop!

Topic by mistresscroft69  


What is the first thing you look at in a website?

I am redesigning my website (again) but this time I am doing it all myself. No Wordpress or phpBB involved this time!! And this year in my Computing class, I have learned a fair bit on contrast, hierarchy, and how to lay website elements out proportionally. Have a look at what I've made so far: http://geekify.geek.nz (all the links are dummies, and the navibar has a couple of bugs in it). However I want to find out what people first look at, when they visit a new website. Is it a big banner, bright colours, a logo, an annoying 10min Flash intro? For instance, what first catches your eye on this....design crime: http://www.havenworks.com/ ?

Question by asasklfjklasfkljasklfjaklfsjkl    |  last reply


GameBoy Advance overly saturated screen... How to fix? Answered

I got a GameBoy Advance a few years back, the Nintendo DS of last decade. It worked great for about a year and then (I think I may have dropped it) it started displaying the colors on the screen way too brightly! Nothing else was effected, but the screen looks as though it doesn't know what "dark" means. All of the games I try to play are way too lightly-colored, to the point that I can't see any details at all. As you can see, I try to play Frogger's Adventures: Temple of the Frog, but I can barely see where I'm going because the screen is too saturated. Oh, and another thing: After the screen started doing this, I dropped it once more, and it switched back to normal for a time, but then after 30 seconds, it flipped to the higher saturation again. This would lead me to thinking that something is broken inside... Is there anyone out there who knows of this problem, and perhaps, knows how to fix it? Thanks, Win Guy

Question by Win Guy    |  last reply


is a coilgun (gaussgun) better than a railgun? Answered

I am writing an essay comparing and contrasting a coilgun and a railgun. i know the differences between the two but i am in need of outside opinions on what is a more effective tool.

Question by BrendenK2    |  last reply


Is arduino nano can power many sensors and IC?

Is 5V in arduino nano is enough to power up two IC555, DS1307 RTC, LM35, DHT11, 74HC595N and 74LS14 IC's. 20 x 4 LCD at the same time without affecting LCD brightness and contrast?

Question by Rajkumar2506    |  last reply


What is this bright yellow growth on this log? Answered

No camera editing of any sort (no contrast or anything: it's really that brilliant Big Bird yellow). Found it in the woods here in Northern Vermont. What is it? It looks so cool, doesn't it? Photos taken summer '08.

Question by Pompom    |  last reply


There is an problem in my account/control panel.

Normally I can see my statistics in my control panel. There were some different sections in contrast to image showed. Last days, sometimes I couldn't reach my control panel, today there is nothing to see my statistics . What is the problem, I couldn't get it.

Topic by JeoleX    |  last reply


Why does wine or beer pair better with matching food?

This has always stumped me; however should not be confused with the question: "what goes with wine or how to pair wine?" I know that in theory, heartier wines pair well with heartier food; and that light, refreshing wines should pair with light, refreshing food. In practice, I agree that wines or beers tend to pair better with matching qualities in food. Whereas with all other beverages, I always feel that contrasting pairings work best. Dessert for me always requires a black, robust cup of coffee; and a cold, sweet Coke always goes very nicely with a savory lunch. The reason why these pairings work so well is because of their contrasts. So, what is so special about beer or wine that they pair better with food of similar characteristics?

Topic by N.fletch    |  last reply


photo editing while publishing instructables

This isnt really directed at anyone, but i think when your making an instructable you should be able to edit a photo you have already uploaded. nothing major, maybe rotate, flip, crop, contrast, sharpen stuff like that. i was just thinking out loud.....

Topic by bumpus    |  last reply


Glitchy I2C LCD (lines on the display)?

So, I am working on a little project with an Atmega328 and an 16x2 LCD. I have it wired up and when I went to test it with the "hello world" example, The LCD does work, but there are random lines on the display..  It's not the contrast or the code, and I checked the connections and it all seems ok. What might be causing my problem? 

Question by Dashing Rainbow Dash    |  last reply


Photographic Atmospheric Perspective: Does anyone know what this is?

Ok, so my not-so-tech savvy cousin called me and asked me about atmospheric perspective. It is a college assignment, and I believe she has to exhibit atmospheric perspective with a picture of a playground play set. Should she take the picture during sunset where there is a different contrast on different objects? Thanks for your help.

Question by Brennn10    |  last reply


reuse contest prize distribution.

Hi, as a proud winner of the recycle and reuse contest in December i told all my friends of my good fortune, now they ask 'well?lets see your prize then' To which i can only reply i have not got it yet. in contrast the runner up prize for the photography contest arrived swiftly. here are pictures of instructables iv made since then.

Topic by crazyg    |  last reply


My Custom Converse Shoes

My purple and black with white contrast-stitching custom Converse shoes showed up yesterday. Check them out as I try out my new treadmill desk (Instructable forthcoming...). Converse is an advertiser on Instructables, but I thought the custom shoes were cool enough (and actually the creative on their ads, too) that I bought a pair irrespective of any business relationship.

Topic by ewilhelm    |  last reply


How to Full a Sweater into Felt

Scope this post at CRAFT to learn how to upcycle your old wool sweaters into felt!  Brookelyn compares and contrasts the techniques and benefits of hand-fulling vs. machine-fulling, and shows us samples of the results.  Fulling is the process of turning knitted or crocheted wool into felt. So check it out, and start upcycling those old wool sweaters into new Instructables!

Topic by scoochmaroo    |  last reply


ibles movie media dump

Hi all this forum is where people who want their media(pictures,clips, voice overs.....) can drop them off and we can see if we can fit you in. I am using a ubuntu computer so if you could keep the format a general format. And we can also put together our own movies so we can compare and contrast against other iblers.

Topic by acidbass    |  last reply


Projecting outside: colours?

Is there a way to get colours to be more contrasted so that they can be seen more clearly? I want to take this: https://www.instructables.com/id/PROJECTION-BOMBING/ and turn it into this: http://www.gregbernstein.tv/walmartwatch/ Also, is there a way to increase the lumens of a projector by changing the bulb or something? I have a feeling my projector isn't bright enough to project outside. I was thinking of using this: https://www.instructables.com/id/Halogen-Work-Light-Projector-Mod/ Would that be bright enough for outdoors projecting or is there another cheap alternative?

Question by 123fakestreet  


bug report == or at least it is to me

I use Corel  Photo Paint 16 to edit all my pictures. It is running on a fast Windows 7 system. I often shoot pictures sideways with my camera for a better use of the rectangle format. It is a DSLR by Olympus.  So when I edit the pictures I rotate them and fix contrast and everything. I also reduce the size since the camera takes things at the max resolution.  But a strange thing happens when I upload the pictures to instructables. It changes the orientation back to the original. All the cropping and contrast adjustments are there, but the pictures are sideways. Not just the thumbnails the entire picture. So I have to go through them and use your online edit program to rotate them back to where they should be. This is sometimes a problem when I am trying to put up a new instructable and I have a lot of pictures and I have to spend a lot of time re editing the pictures again. What is an even bigger problem is when the online program messes up and I have to just post things sideways until the program starts working correctly again. I almost missed the deadline on a recent contest because of the pictures needing to be fixed. Any clue as to what might be causing this?

Topic by Vyger    |  last reply


How to drive a Graphik LCD Optrex DMF6104NF-FW?

Hi I happend to get hold of an 256x128(dots) LCD (Optrex  DMF6104NF-FW), and want to controll it with an arduino or an PC. My proble is: -I'm new to LCDs and -I'm new to the arduino I got the datasheet of the display and managed to power it up and regulate the contrast, but now I stuck. I don't know how to go on and get grafiks on the display. what do i need or what should I look for ? can someone help me ?? thx EDIT: here is the link to the datasheet : http://www.datasheetarchive.com/pdf-datasheets/Datasheets-24/DSA-464875.pdf

Question by virsing    |  last reply


Quantum random-walk puts single atom into observable superposition of states

Http://physicsworld.com/cws/article/news/39802Single atoms have been spotted doing the quantum version of the random walk by physicists in Germany. This sighting of a "quantum walk" could help in the design of quantum search algorithms, or in the understanding of the transition from the quantum, microscopic world to the classical, macroscopic world.Update 15 July 2009: The actual paper appears in this week's Science (pay-per-view, unfortunately). Here's a nice diagram from the article, contrasting (left) the quantum superposition with (right) one of the classicial random walks. The histograms below show their actual measurements in the two situations.

Topic by kelseymh    |  last reply


This is what happens when you're on the frontpage

Here are graphs of the stats of two of my instructables. They clearly shows that being on the frontpage or featured in the weekly newsletter really gives you a boost.The Marble Clock (the graph with 0-5000 as the scale for pageviews) got in the frontpage as Popular in the afternoon the 14'th, you can clearly see the rate increase of pageviews.The Spooky Led Lamp (the graph with 0-10000 as the scale for pagevews) made it to the Weekly Newsletter sent to the subscribers in the eventing the 14'th. As can be seen on the graph the numbers of pageviews increased really fast at the next few hours then went back to the normal pace again. In contrast to what happened with the Marble Clock this instructable also got a real boost in the ratings due to the newsletter.Here's a link to the Instrugraph Instructable.

Topic by matseng    |  last reply


Powering a 16x2 LCD Screen? Answered

Hey all I am relatively new to the Arduino platform and learning as I go. I have a 16x2 LCD screen that I am trying to learn how to use. I hooked my positive lead to pin 2 and the Ground to pin1 and nothing lit up. I then hooked a potentiometer up to pin 3 to try and adjust the contrast still nothing lit up. Does this mean my LCD screen is broken? I haven't sent any code to it so I am not expecting it to "say" anything, but i thought when the power was on it would at least light up? Please let me know if i need todo anything else to make it light up or if I need to buy a new LCD. Thanks!

Question by Mpc1055    |  last reply


Patchwork fabric paving concept.

On Freshome, via NOTCOT; Juliana Santacruz Herrera decided the streets of Paris were too gloomy and needed a little fresh touch. With these in mind she came up with the concept of decorating the potholes of the city using colorful strips of fabric. These were placed randomly in shallow breaks and cracks, creating a fun and colorful change in the landscape. The artist’s visual intervention brings a happy touch to the gray streets of Paris and creates a fun and appealing contrast with the dark cement. But what if we were to take this idea further? If you like how this photos look, perhaps you could use them as a source of inspiration when it comes to patching up your own courtyard, patio and so on. Sounds practical? So, how could it be made (reasonably) practical? Maybe a pourable clear or translucent resin?  What do you think?

Topic by Kiteman    |  last reply


Thickening enamel paint. Answered

I am looking for a way to thicken enamel paint to a buttery consistency similar to the acrylic paint you get in a tube. I worked out a decorative effect years ago which uses acrylics and is good for painting tins, but was never hard enough to last well. The only thing I could think of was ground glass, but I'm not sure if you can buy this as a hobbyist, as it used to be used as a poison. (If you're curious, the way I used to do it was to lay down a layer of acrylic in one colour, pick up the surface with a brush to make it stand out, wait for it to dry, then put a contrasting colour over it, and when it is dry sand it with wet sand paper until the colours from below stand out. It makes a marbled ripply effect which looks pretty e.g. in purple and orange).

Question by ganglion    |  last reply


Cal Lane's steel lace

The photo of this cut-steel lacework make me want to run out to the shop, grab the torch & some scrap steel, and start carving. Cal Lane cuts shovels into lace, oil drums into tapestry, and I-beams into filigreed sculpture with incredible delicacy. From the New York Times article: "The work is about the contrasts between the industrial and the fanciful, the opaque and the transparent. Ms. Lane described herself as "a person who always has opposites in my head."She started her adult life as a hairdresser (her mother owned a salon in Victoria), but she said she was a tomboy and "welding seemed to fit me better." The mix of feminine and masculine vocations (teasing hair and welding steel), she said, is encapsulated in her work."Check out more of Lane's work here and here. Amazing.

Topic by reno_dakota    |  last reply


i need help picking out a TV?

i want to buy a 29-37 (preferably 32) inch TV that has Internet Apps; (maybe 3D); at LEAST an 80,000:1 contrast ratio, (maybe 120 Hz or more, but I'm not very picky as long as there is no flicker on the image); and 1080p full HD. i found many models rounding at about $900 (without 3D, of course), little pricey huh?   my QUESTIONS: 1) picture-wise, what is the difference between "back-lit LED", and "edge lit LED" and is there any other technology i have not heard of yet (NOT including back projection of a projector)? 2) which would be the best choice LED, LCD, or Plasma, (of if cheap, small and light enough,      back projection DLP)?         (i don't really care about efficacy, but i do want one with a good lifespan; really bright colors     (like led or plasma) and good contrast, and has deep "black" blacks; hopefully 1080p, but     ill settle for 720p, less than 8 ms response time; has a great viewing angle; and last and     certainly not last, one that is under the $1600.00 price tag!) 3) whats the difference in the picture quality with edge-lit-LED and back lite-LED? (i know the led      placement in each corresponds with the type of led tv it is.) ____________________________________________________________________________ right now, i have a 19 inch CRT 4:3 aspect ratio (i am guessing 480p res) the TV itself is a "CurtisMathes-Tronics" brand (i never heard of it) (model # "CM 19022S"). its OK. it works, but its getting too small for me, and after i bumped into some money last summer ($700) at the peek and i am thinking saving for a "state of the art" HDTV! next year, with my summer job, i should have $1500 to spend.

Question by -max-    |  last reply


Hydrogen car to be Open Source

The manufacturer of a hydrogen car unveiled in London on Tuesday will make its designs available online so the cars can be built and improved locally.The Riversimple car can go 80km/hr (50mph) and travels 322km (200mi) per re-fuelling, with an efficiency equivalent to 300 miles to the gallon....The company will distribute the engineering designs to the 40 Fires foundation, a not-for-profit organisation that will make the designs "open source".The idea, they say, is to allow local manufacturing in small plants. This stands in contrast to the "economies of scale" that drive current plants to huge sizes and workforces.In addition, designs can be adjusted for local markets, using locally sourced parts or materials.The agreement will be such that if the designs are improved by a local manufacturer, those improvements will be sent back, so that what the company refers to as its "network of manufacturers" can contribute to the overall development of the product line.

Topic by Kiteman    |  last reply


crt monitor image distortion

I have huge 21 inch crt monitor which i found yesterday in the trash i plugged it in now. it works but the image has some distortions the color that should be black is bright gray and all other colors are like addition to it. the image looks very bright and with bright gray tint. setting brightness and contrast to minimum does not help much there are some kinda scratch lines across the display. the lines form a shape of a 'lightning' with horizontal lines and diagonal that connect them. the density of lines is higher when i switch to higher resolution the image size is severely affected by the brightness of what is displayed. it grows larger about 1 cm on each side when i open a window with white background other than that the monitor works ok in all resolutions from the bios screen and up to 1600x1200 what can be the problem ?

Topic by 11010010110    |  last reply


Hispanic or Latino?

I cringe everytime someone uses the word Latino when generically speaking of Spanish-speaking people. I prefer to be called Spanish or Hispanic. Some people may disagree with me but I think that calling me a Hispanic describes my true ethnical and cultural origin. Although many people will bring the fact that the colonization of America by the Spanish conquerors was bloody and opressive, we still owe to Spain the origin of our countries. From Mexico to Patagonia and the Large Antilles, the Spanish conquistadores left their footprint in the form of language, architecture, religion, cooking, stories, art, crafts and culture. In contrast, a Latino is anyone who descends from people that speak a Romance language like: French, Italian, Portuguese, Spanish and Romanian. By that definition, when we speak of Latin America we include countries like Brasil, Haiti, French Guyana and, Surinam. The same definition could apply to Italian-Americans, French-Americans, French-Canadians, and Cajun people.

Topic by blkhawk    |  last reply


Newbie needing help please

Hi everyone, I'm new here, and new to making circuits. I've been scrapping them for quite some time and feel terrible about how much goodies I've thrown out in the process :(  anywho, I saved a ton of it, And today I picked up a "Futura 100 color graphics at its finest" box, it has 5 knobs on the front for: Hue, saturation, contrast, black, and white, has a power on led and reset button, floppy drive. in the back it has a 3-25pin connectors (2female and 1male) for printers, a video in and video out, power switch and 3 prong plug, fan, keyboard connector, and a 9-pin male test port?  Inside it had a dark drive and has TONS of ic chips. ill quit blabbering and get on with it, does anyone have any ideas on what this can be turned into? One or multiple projects is fine, as long as this thing gets a good use. I'm hoping to make a variables power with led display for my atx.

Topic by Ryan53090    |  last reply


Pi 3 Displaytech issues

Hi I'm currently making a project involving a Displaytech 204A 20x4 LCD display. I've have followed several guides and made my own changes but I am not getting any text on the screen when I run the program. I'm using test code as follows: from RPLCD.gpio import CharLCD from RPi import GPIO lcd = CharLCD(cols=20, rows=4, pin_rs=15, pin_rw=18, pin_e=16, pins_data=[21, 22, 23, 24], numbering_mode=GPIO.BOARD) lcd.write_string(‘Hello world’) I have a 10K pot resistor for the contrast (LCD pin 3), and have tried several different resistors and pots on pin 15 but to no avail. There isn't any backlighting too it seems. Everything is wired up as it should (I believe) with the GPIO pins matching the code, could it be a difference in the display? I have checked the datasheet and the LCD pins do match up with the model used in the guide. Any help would be greatly appreciated, thanks.

Question by PiController1  


How do you convert a UHP lamp specifically for a DLP Viewsonic pj250 projector into an LED lamp? Answered

I have a DLP type Viewsonic PJ250 projector, it uses a UHP 120 W lamp, gives 1000 Lumen's, and 2000: 1 contrast. Our current technology doesn't seem to have made an actual LED version lamp for this or replacement LED for them yet, but one day someone will, is it you? Current lamp costs $200+  so developing this will help out people that need a lamp last more than 2000 hours. So is there someone that is up for the challenge of redoing or making a way to connect this and other projectors with LED technology in a relatively affordable manner? I have researched online and seen people do it for other types of projectors, like LCD, and understand the precise lighting in such a small area needed for my type of projector. I believe it is possible very soon to recreate a new lamp even if it takes a little rewiring and ingenuity. Thank you, I look forward to learning something new.

Question by robadelic27    |  last reply


Transparent LCD - Alpha Channel Monitor

I'm working on a project for my MFA, and am trying to figure out how to hack some LCD's. The idea being that I need a screen that will simply display black or transparent, no colors, but it should be able to accept video input of some type. Hacking a tv or iPad seems the most likely route. The remaining image should show the ambient background through the screen with certain areas shaded according to the luminance or darkness of the video input. While I understand that with all of the polarizing filters applied, light transmission is less than 5% in some lcds, I don't know what happens if you remove the polarizing filters? I remember the old 'Tiger' lcd games that were quite transparent and high contrast, but they definitely didn't play any video! If anyone has any experience with LCD's and the polarizing filters, I'd love to hear your input. Alternately, if anyone has ideas on a video capable b&w; display... They all seem to be for medical purposes and are quite expensive! Thanks!

Topic by Designer Dan    |  last reply


ATC 1000 Helmet Camera -- On the riggers

I let a friend of mine borrow the ATC 1000 helmet camera from the Magnet Challenge... I also let him use my 256MB SD card -- so he was able to get about 12 minutes of video at best quality outside(high contrast = less recording time). He started it really early - so he did not get the whole race but there's still some cool stuff on there (I edited out about 8 minutes). For a digital camera, it's not the best -- but it's pretty good for it's size and weight. And it handled the partially wet conditions like a champ :)He attached the camera to the riggers (the part that supports the oar) on their shell (aka the boat). The white box thingie is a speaker to help out the coxswain (the person yelling commands, encouragement and counting off).Video is cut short - but you get to see them start off in their power 10. At one point you can hear them catch their rhythm and everything makes nice sounds :PVideo is not as good a quality as the raw footage (too big to upload :P). I think this convinced my buddy to find one of these cameras too :P

Topic by trebuchet03    |  last reply


broken monitor help?

I've had this monitor for years and now when i pug it into any computer it is black. i know it is getting something to the monitor because when i plug it into a com. it turns a different shade of black. Plus when i turn the monitor off then back on it show me a quick glimpse of what the screeen should look like if it worked. i presume there is a short in the monitor. i believe it is a cft monitor. b4 i open it up i want to know if there is a simple diagnoses. oh and i did try messing with the brightness and contrast. i wouldn't be suprised if i had to open the monitor. i le it sit for a few days to allow the capacitors to discharge. i am really good with a soldering iron so if i have to replace a resitor or capacitor it'll be fine. and p.s. is there a way make a tesla coil out of simple parts like a day creation? and to all those who have jailbroken ipods and iphones with installer is anyone els experiancing problems downloading Cracked apps? thanks -miiwii3 some one help

Question by miiwii3    |  last reply


Modular Furniture Parts (or Legos for Adults)

I've been considering building more flat pack furniture (I'm sick of moving around awkward cheap crap made of MDF or particle board) and I've been thinking of maybe making some kind of modular parts that could be configured in different ways to become different pieces of furniture. Does anyone know if such a thing already exists? Also one of my sketches involved building frames out of posts and cross pieces with some surfaces built from strips of wood suspended on metal rods. I was wondering about the feasibility of making something like that. I realize I'm sort of babbling here so I'm attaching an image from my sketches. Does this make any sense? What could these supports be made of? Originally I liked the idea of using metal for the contrast in materials, but I don't have a metal shop and I think getting them fabricated would be expensive. If anyone has any input, let me know. It would be cool to have an open source modular furniture system (well I think so).

Topic by drocko    |  last reply


Take a Black and White Photo, Get a patch!

 Hello again. It's time for another photo contest! This month the theme is a nice broad one, just to get things going after the first one last month. Black and White This months theme is Black and White. Try and focus on those distinctive shapes and defined shadows that make black and white photos pop. Get into the mindset of what will look good when in black and white. A good contrast is normally a good basis for a black and white photo. Any black and white photo is allowed, digital or analogue. Nearly all modern digital cameras have a black and white mode. The one stipulation is that you have to go and take a new photo! Not just upload an old photo. The idea is to encourage you to take some new pics, opposed to showing off what we have done before. Attached are a couple of shots I took today! Every black and white photo uploaded gets a Patch! If I missed giving you a patch last month, let me know in your comment, and I will send you one of each to make up.

Topic by gmjhowe    |  last reply


What NOT to do.

Not sure whether this is a contest idea, or just a philosophy, but the idea that we learn more from our mistakes rings true.  Although it might be tediously long at times, I'd kinda like to see some -ibles that include the messy details of attempts that didn't quite work, what was learned, and how. Sometimes tangents xyz come out of an attempt to acheive abc. y'know- the happy accident.  Examples?: I was annoyed with Apple for making a keyboard with light grey lettering on white keys. I like to dim the lights, and am not really a touch typist. So, I photocopied the keyboard, increased contrast, and printed this onto transparent sheet with adhesive backing (available at a photocopy place. Fed-ex, kinkos, i don't recall)  Turns out that the ink on those copies is on the top surface of the plastic. After cutting out my qwerty stickers, I found that the ink wears off the surface.  Not only that, but after peeling the stickers off, the goo remains. (sigh)   So, if u use this technique, put clear tape over the clear photocopy. I just bought a microwave with grey on black keys. I may havta explain to the copyshop why I'm photocopying my microwave. ;) Any other examples?

Topic by Toga_Dan    |  last reply


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    |  last reply


Effects on metal

So I really like this clock.  I think I'll buy it soon. But as a beginner's art project, I'm trying to replicate some of the metal effects here.  I'm curious for techniques on how to accomplish some things, like: The back plate is copper, which the artist says is "oxidized".  I expect oxidation to turn copper green, blue, or black, not this silver/grey color.  Any ideas how this was done?  Is it just that it's a light oxidation? I really like the metal texturing here.  I've been able to replicate something similar on copper plate by hand-sanding in one direction with a fine-grained sandpaper.  But notice the vertical texturing on the backplate - how would that have been done?? I like the polished metal look of the minute hand contrasting with the reflective look of the hour hand.  How would you do that - similar way as the backplate?  Same with the gear? I've actually made what I think are much prettier nails by taking old (originally quite rusted) square iron nails, removing the rust and grinding the crap out of them with a bench grinder until I get a cool reflective finish.  Doing the grinding in patches gives it almost a hammered metal look while keeping the reflectiveness.  I think the effect is cool and really works with the "old-but-new" look of the square nails.  I'll post before+after pictures if anyone's interested.

Topic by ischorr    |  last reply


What do i add to my alcohol fuel for my flamethrower, to make the flames brighter? Answered

Hi Im working on a flamethrower which is turning out pretty well, the only issue is, since im using alcohol as the fuel, the flames are pretty much invisible, i was wondering what i could add to increase the carbon content. Normally ide experiment with adding a little gasoline, or diesel to it, but i have to be careful with my pump, its made from either ABS or PLA, and for some reason everyone on ebay who sells them are very sketchy, ive bought 4 in the past and only the last one ever arrived. Anyway, what can i add to my fuel to make its flame more visible? Fortunately my flamethrower does not leak at all so its safe to move up from alcohol to something with a higher burning temp. What can i add that will not dissolve the plastic, increase flame brightness, and not increase the burn temp too much. Before hydrocarbons, are there any salts or chemicals i can dissolve into the alcohol to do this? i beleive i can dilute the alcohol a bit with water so it will take sodium, but will that have any significant effect? The sun is pretty bright here so alcohol flames are invisible, gasoline flames however are very visible in contrast. Thanks

Question by oldmanbeefjerky    |  last reply


Advice to build a tank to film dunking a basketball!

Hello!Here’s my challenge! I need your help. Could you recommend a build for this project?I’m looking to build a solution so I can film myself dunking a basketball. I would like the shot to follow me as I approach the hoop from about 10-15 feet away. My idea is a tank with a mounted GoPro onto it, possibly on a tabletop tripod as well.My budget is $50-100. The tank would need to move simultaneously with me as I approach the hoop. I thought perhaps a line tracking sensor could work, I could lay a piece of contrast tape on the solid colored basketball court. Or if I can program a movement with proper timing. Whichever is easier.I chose a tank versus car so that it would reduce vibration and steadier shot. Also a tank is sturdier so in case the ball flies over and hits the tank and camera.I don’t have any programming or robotics experience, but I’m a quick learner. I’d rather not tinker too much, and just want to have a working solution so I can focus on dunking!thanks for your help!Bhere’s a possibly chassis: OTTFF Robot Tank Chassis Track Compatible with Arduino Tank Aluminum Alloy Chassis Raspberry DIY STEM - Speed of 20m / min Maximum Load 2kg https://www.amazon.com/dp/B07C2Q63XG/ref=cm_sw_r_...

Question by bsee20  


easily viewable cheap LCD in bright glaring sunlight?

I recently bought the cheapest screen I could on amazon for around 20 or so dollars for use on my quadcopter, it is a really crap quality display (only 480 x 272 resolution, and very poor color reproduction, viewing angles, and contrast) but it does serve the purpose of a FPV display for my quadcopter. However, I remember my old faithful flip mino camera as well as my old palm centro phone which had some type of semi-reflective LCDs on them! The displays could easily be seen in direct sunlight even with the brightness set to the minimum! They seemed to work a bit like calculator LCD displays, where they work on a basis of reflection, but also have backlights in them. To verify that the display on that flip camera does indeed reflect light back, I charged it up and turned it on with my 2000 lumen LED torch shining directly at it. images on my GS3's AMOLED panel would only be visible with the brightness cranked wayyyy up, and similarly on most LCD displays. They just could not handle the same way the flip camera did! You could clearly make out a picture on the flip camera display even when it was charging and the backlight was 100% off! What would I be searching for to find a display with a composite video input capible of being viewable in direct sunlight like this? Might it be possible to modify my current LCD to make it more viewable in direct sunlight?

Question by -max-    |  last reply


Submit your instructables for a sustainability guide!

Hello community! I haven't posted any instructables in a long time because I've been in college, studying for a sustainable manufacturing degree. After being frustrated at my lack of tools and workspace, I realized that I could just use other people's work! Bear with me here. I'm not stealing your projects or ideas, far from it. I am looking for a few instructables that I can analyze and review based upon their sustainability. I will compare and contrast several projects, relate all this to sustainable manufacturing principles, suggest changes to design or process, and then finally write it all up and publish it as an Instructable for the community to enjoy and learn from.  All projects and photos will be fully credited to their original creator.  I don't have an exact time frame of how long this will take, but I estimate that with in depth research and ample procrastination I can get the guide done in two months at the absolute maximum.  I'm also not sure how many projects I will need for the guide, but I'd like to set it at no more than 5.  So, if you are interested in having your project analyzed and expanded upon for the benefit of the community, comment here. Here's a few guidelines for what I'm looking for.  PICTURES. If I don't know what the hell your project looks like I can't do anything with it. Also, you must be okay with me copy pasting them into the guide and editing/marking them.  WRITTEN DETAILS: Again, if I don't know what you did to produce the project, I can't really give any complete feedback on it. The more in depth and well written the better! I might very well quote you directly in the text. DURABLE GOODS: Because I'm a manufacturer, I deal with things that are built, in one way or another. I'm sure your recipe is delicious or your computer code can power a spaceship, but I can't really practically analyze it if it's been gobbled up or is buried in some program files. I don't speak code. AT LEAST 6 MONTHS OLD: one of the parts of sustainable practice is to make something that lasts. Therefore I would like to use projects that were made a while ago so that I can ask you how the object is holding up and if it needs to be repaired, how it has been used, any changes you would make, etc. IT DOESN'T HAVE TO BE GREEN AND HEALTHY: It wouldn't be much of a compare and contrast guide format if everything produced clean energy and rainbows. I need a spread from environmentally friendly projects to things that belch black smoke and get gallons to the mile.  YOU CAN TAKE CONSTRUCTIVE CRITICISM: I'm analyzing this from a professional standpoint, not a personal one. If your object has killed a couple of owls in the forest, that obviously isn't very sustainable, and I will mention it as a negative thing. If you can't take this kind of critique, then you won't like this guide very much.  YOU ARE WILLING TO COMMUNICATE: I'll be asking you some questions about your project, if you never answer your Instructables messages or reply in one word answers or 133t5p34k I can't get any useful info for you.  if I use your project you get a patch from me, and further exposure for your project on the site, as well as a lot of good information for a re-design or refinement of your original idea

Topic by ilpug    |  last reply


What on earth could I use this 'Lectern Commander' for?

I picked this up on ebay for 5 dollars last month, apparently it retails for a couple of thousand, but im yet to think of a novel way to utilise this guy. Here are some specs from the pdf file i found on this lectern site.The Lectern Commander is able to communicate both direct Infra Red and RS232Combines the best features of a dedicated key control panel and a colour touchscreen in a single unit - Fits directly into unmodified industry-standard lectern - Modular design allows integration of microphone sockets, lectern light etc. for special applications - 32 key digital matrix touch overlay - Flexible – can function as a stand-alone controller or in conjunction with any of the CommBox range of processors - Easy to program with standard Joey software, tools and library - Low power consumption allows operation on long low-voltage cablesKeys: 32, including 10 touchscreen keys Panel Type: Colour LCD, CCFL Backlight Panel Size: 4.0” diagonal Resolution: 320 x 240 pixels Brightness: 80cd/m2 (Typical) Contrast Ratio: 17:1 (Typical) Display Colour: 8 Colour Connectivity: IRBus (6.35mm TRS), IR (3.5mm phono), RS-232 (DB9). IR carrier frequency: 38kHz (industry standard) Power Supply: 12volts (Supplied by IR-Bus) Current demand: 100 – 200mA (depends on brightness setting). Standby current: 5mA. Enclosure: Steel, black powder coated Dimensions: 540mm x 80mm x 70mm hmmm any ideas???

Question by daulef    |  last reply


Multiple Ideas / Scholarship Submissions

My first two ideas pertain to the realm of sports. Luckily enough I have a city park for a backyard that is big enough for me to hit my low golfing irons. The only problem is having to chase after the balls myself thus consuming valuable time and energy. My proposal is to alter the irobot to retrieve the balls for me in one of two methods. Additionally I would also like to enable to robot to possibly record the location of where it retrieves the ball to help in my swing analysis method 1: Add a mechanical arm, cage and rake system a la the golf cart guy at your local range by sending the robot out on pre-programmed sweeping patterns. method 2: develop some sort of mechanical arm that can retrieve individual balls by locating them with an ir detector as the white of the ball contrasts with the green of the grass. This could also be modified by loading the golf balls with RIF chips and having the robot detect this symbol. The second idea is to turn the robot into a living assistant for my grandmother. Some of the various functions that I would look to add include some sort of panic button, or emergency button especially as it pertains to her falling down and being unable to get up, others functions would include picking things up off the floor as she has troubles bending, and assisting in the transportation of groceries and other items through the use of either hamper like structures attached to the robot or a coat tree like structure. Additionally I would program the robot to take advantage of pre-existing sensors so that it could follow my grandmother wherever she went and possibly provide a better platform for her cell phone as she never hears it and complains about carrying it and possibly add some pda like features.

Topic by bigtheo23  


Windows 2000 running from USB stick, need done by monday

I looked over google for this, but i dont get any of it. The idea is: My school have the best Web-Filtering system, SWGfL, and have RM connect, and the IT guys installed Win XP on all the PC's, by USB stick, which i figured when the PC wouldnt boot with my memory stick in. Knowing this hack, i want to know how to install Windows 2000 onto my 1 gig USB stick and have it boot on any USB-boot enabled PC. No one suggest linux, cause its obvious im running linux and i would get banned from the school PC's for a bit, or an Afterschool at the least, and because my account on the schools lets me change my background picture (My pics: Right click, Set desktop.....) and i seem to be one of the only ones that can, and because the high contrast lets you choose win classic for a theme (cause they disabled the display control). All in short...... I want Win 2000 to boot from my USB stick, let me change the background, and have it run on my school PC's. NO LINUX!! I have a sort of grudge against it aswell as the fact my ICT teacher saw me use Ubuntu once and said "Youre only allowed to use Windows on theese pc's" He never said which one. BTW: Everyone knows i can change my BG, even our schools admin, and they know i like having the theme as windows classic. And i need this USB windows ready by Monday, my deadline.............please dont read and not respond, and dont link me to pages you find off google, they dont make sense to me.

Topic by ultimatesx9    |  last reply


A Perplexing Plurality of Privacy Policies

Near the bottom of many of the pages found on Instructables.com, there is a section labeled "About Us", and underneath that heading there is a list of various links,  titled: "About","Advertise","Press","Contact","Jobs","Legal","Help", and "Privacy Policy" The problem is this:  The link titled "Privacy Policy", does not always link to the same URL. On some pages it links here: https://www.instructables.com/about/privacy.jsp However on other pages it links here: http://usa.autodesk.com/privacy/ One of those pages is the simple, honest PP that Instructables has had for as long as I can remember, going back to the distant bygone era of at least 2008, by my recollection at least. The other page is, what I am guessing is, the privacy policy "inherited" from Autodesk, back in 2011, which was a long time ago, but not that long ago. In contrast to the old Instructables PP, the newer Autodesk PP seems to me to be a little bit more labyrinthine.  You know:  you follow a link, then you follow another link... http://usa.autodesk.com/adsk/servlet/item?siteID=123112&id;=14175119 http://usa.autodesk.com/adsk/servlet/item?siteID=123112&id;=14175119#9 http://usa.autodesk.com/adsk/servlet/item?siteID=123112&id;=13252943 and that leads to an op-out form, which contains the plural question: "Would you like to receive information from Autodesk, our affiliates, or partners including information about new products and special promotions? Via Email?Via Phone? Via Postal Mail?" And there are three little [Yes][No] radio buttons for those. For some reason, maybe it's just the voices in my head,  I don't even want to know what happens to anyone who submits that form. I mean its probably mostly harmless.  Probably.   But, still, I don't want to touch it. Anyway... my point here is that even though no one ever actually reads the privacy polices, it would be nice if all the links that say "Privacy Policy" on Instructables point to the same page.  I think it  would look more consistent and sane that way. Moreover, it would be extra special nice, if the PP page all Instructables pages link to is the nice, simple one, on the Instructables domain, here: https://www.instructables.com/about/privacy.jsp And maybe everyone here could just ignore that other PP on the Autodesk domain. I mean, that's my suggestion for solving the consistency problem. In fact there exists a clause in the Instructables PP under "Business Transfers", and the language in that sort of infers  the Autodesk PP may be in effect.  That is, assuming everyone knows about Instructables being owned by Autodesk. What I'm saying it that you could just leave it up the members who read the Instructables PP, to conclude that the AutoDesk PP may be in effect,  that might be good enough, and interested persons could look into that can of worms, on Autodesk's domain, on their own if they want to. In conclusion:  Just change all the links titled "Privacy Policy" to point to: https://www.instructables.com/about/privacy.jsp and call that good.  Because the alternative, links to plural PPs across different domains, is confusing, and kinda looks inconsistent and bad.

Topic by Jack A Lopez    |  last reply