Welcome Mat weight scales

I would like a welcome mat that would display the persons weight on an eye level digital readout [large].  I have people over a lot and I think this would a great way to start the ladies party.  I have  scales in small hallway and have beeen surprised at  how many people get on it. I love this web page and marlvel at the things ya'll make.  I am so envious. Gail gandr1212@aol.com

Posted by Gandr 8 years ago

acceptable angle of deflection for temporary support

Hi, I am in no way an engineer.  I'm trying to figure out what is an acceptable angle of deflection for a combination frame and hammock support.  I'm thinking of using the the 80/20 t-slot beams.  I want something that is portable, easily assembled/disassembled for moving, and lightweight.  I'm go to make a box in our garden to protect our plants and when the corn is big enough, move the box around to make a hammock support(chicken wire around the bottom part to keep the critters out).  It's basically a box 6 feet wide, 8 feet long and about 6 1/2 feet high. 4 beams to make a rectangle on the bottom, 4 uprights(1 in each corner), and another 4 beams on the top to make it more rigid.  Chicken wire will keep the pests out but let me in to relax until the corn is too high and I move the frame.  :)  I'll put the hammock diagonally from pole to pole; total weight with me and the hammock is about 250 pounds.  It will be anchored to the 2 uprights with 300lb chain at each end. Using the angle of deflection calculator from 8020.net, I found some beams that had 5mm deflection with 150lbs of dead weight in the center of the 6 foot span.  I thought that even if I anchored the hammock to the center of the 6 foot span, that would be 300 pounds, more than the 250 max the hammock and I will be.  And anchored in the center of the beam is the worst case scenario since I'll be anchored to the corners. But is that an acceptable amount of give in the beam?  It's not meant to be permanent.  I won't be in it more than 2 or 3 hours tops. Thanks!

Posted by BobR90 2 years ago

Arduino interfacing with a load cell w/code - PRIZE: 3Month Pro membership

I'm looking for a good example of how to interface some load cells I have with an arduino.   I haven't found a whole lot in that area here on instructables. I recently received a code for a 3 month Pro membership for having a featured instructible I made, and I will pass the membership on to the person I think submits the best, most complete write-up.  Deadline is May 31st, 2014, or until I find a good one :) Success criteria: -------------------------------------------- *Relatively cheap parts (under $20 USD) *Includes a schematic that can be built on perf-board with a plain-old soldering iron (no tiny surface mount parts, please) *Includes some basic code to run on the arduino for proof-of-concept that reads weight from the load cell. Here's some info on the load cells I have: -------------------------------------------- Rated Load: 5Kg Rated Output: 2.0mV/V±0.2mV/V Creep: 0.014%F.S./30min Input End: Red+(Excitation), Black-(Excitation) Output End: Green+(signal), White-(signal) Recommended operating voltage: 5 ~ 12 VDC Input Impedance: 1060±15%Ω Output Impedance: 1000±5%Ω Protection class: IP65 Accuracy class: OIML R60 C3 Thanks & good luck!

Posted by aka_bigred 4 years ago

Need help removing weight off a motor

Hey guys i'm currently trying to make a very simple robot (2 motors, a battery and a switch) and everything is fine exept for the fact that the motors i'm using are from a PS2 controller, so they are vibrating motors. I can't seem to figure out how to remove the weights (half metal circles) that make tthem vibrate when rotating and that's going to be a problem, since i want my motor to have wheels, not vibrators hah... So if any of you have advice on how to do it i'd be glad to hear it. PS: i joined an image of the motors so you can see the half circles i'm talking about.

Posted by poolm 3 years ago

idea for a simple and thin contact based sensor

Hello instructacles, I'm trying to build a simple contact-based set of sensors embedded in card board, paper or thin plastic sheets. I want to make a simple game for my kids that could detect/react to the presence/absence of some random items positionned on such a board? (empty glass bottle of coke, cereal box, shampoo bootle, you name it) Ideally i would use something like those books for kids where they have metallic threads "printed" on think plastic sheets and when you press them, it triggers a music. But i dont know how to print metal basically. don't really know how to get started. I was thinking of sewing conductive thread but i'm not really sure it would work. I have seen many attempts with aluminium foil (ex: https://www.instructables.com/id/Interactive-Art-With-Scratch-and-Makey-Makey/) but those are based on the fact that a human finger touches them (basically it uses the conductivity of skin), whereas in my game i was to use the weight of random objects from the house (in the 50g to 500g range typically) Any idea how i should get started ? thanks fourchu

Posted by fourchu 1 year ago

leg and arm weights

Will someone write up the plans for a HEAVY-DUTY ankle and wrist weight. I have been searching online for a company that will make custom weighted wrist and ankle weights but there aren't any. I'm wanting to make a 50 lb for the arms and 100 lb for the legs. I'm thinking along the lines of several iron or lead bars strapped together with a nylon fiber or other strong material. I've only ever done projects in high-school, where materials were provided, so I don't really know where to get the materials needed. Please help.

Posted by dhill16 6 years ago

Lightweight Speaker Enclosure

Im coming up to the third (hopefully waterproof) upgrade of my longboard mounted speakers. Im looking for something pre-made like a square pipe or storage box etc, that i can use as an enclosure that has flat ends large enough to mount 6.5" PA speakers onto, is no wider than 8" and no longer than 2ft. It needs to be as lightweight but rigid as possible. Any ideas/links?

Posted by ambientvoid 7 years ago

Ball counter or weight sensor with relay to sound alarm or trigger 9v confetti cannon

Anyone interested in a bit of work...I could also run it as a competition. Apologies in advance if what I am doing in not allowed on instructables, but I couldn't find a place to offer this work. Peoplehour does not specialise in tech gadgets! I am a one man band training business in the UK. I am trying to find someone to make this gadget to work with my Gravity Ball Game. Gravity Ball is a two hour team building activity. Gravity Ball requires teams to design and build a construction capable of transporting a ball from one zone to another; the ball must roll freely along the construction using gravity only. There will be a shared zone that will require team collaboration, co­operation and coordination. Everyone needs to contribute to the overall team objective whilst ensuring their own structure functions to a specific brief and works correctly. All teams will release their designated ball (tennis ball, golf ball, cricket ball, squash ball. Etc.) at the same time. Each team ball will roll freely along the team structure, into the shared area and the fall into a collection container. When all the balls are in the container (and a specific weight achieved) then the Weight sensitive relay switch will detonate a electronic confetti cannon. Alternatively, an infra red or sensor can count the number of balls that pass at a particular point and when the designated number is reached, the confetti cannon will detonate The detonation will give a wow factor to the team activity. Considerations: I need a gadget, Arduino, raspberry pi or beaglebone that can measure or count the number of ball and then detonate a confetti cannon or sound an alarm • Programmable weight or ball counter setting • Maximum weight 300g-400g or Maximum number of passing balls is 10 • Work with standard electronic confetti cannon from Confetti Masters, alarm or Siren (http://www.confettimaster.com/streamer.electric.confetti.cannons.html) or Showtec electric cannons (http://www.sblite.co.uk/598-80cm-multicolour-electric-confetti-cannon.html) Message me if you are interested! Kind regards Canute

Posted by GreenflashUK 3 years ago

The Transition to Veganism

Hey Everyone! The question of the week is: "What is the easiest way to transition from a carnivorous, fast-food diet to veganism"? Be sure to check out my new enstructable, "The Hearty Vegan: From Confused Carnivore to Voracious Vegan" tomorrow!  Thanks for your answers!

Posted by murf73 6 years ago

Tips for exercising?

Since I'm entering a new school for the 2010-2011 school year, ( which means 3 schools will combine into one) I thought I might lose weight. Me, a bit tubby at 92.5 pounds, (As of August 17, 2010) So I decided to run. Everyday, I do half a mile running, and half a mile walking. I started 3 days ago, and I've already seen improvement. I was 93.5 lbs after 1 run. After a bit of cool down, I do sit ups. I've got my MP3 player going (The Rocky Theme-ULTIMATE MOTIVATOR) as I run. Any tips? I don't do sports, and I try not to eat after 8:00. I've got running shoes and a appropriate outfit. I'd like to see what everybody can say to me. -NYPA

Posted by NYPA 8 years ago

Weight sensor kit sending message when weight reduces i.e. 80%

Hi, I am looking to muck up a quick prototype of a weight pad with BLE, Zigbee or RFID to send a message to a smart device when 80% reduction in weight has been achieved. Can someone point me in the proper direction? I like it to be fairly small. Thanks in advance! JC

Posted by JCDA 2 years ago

How to lose weight fast?

Hello there.. I’m preparing for a company team building in famous resort here, but i'm really concerned with my big tummy. This really spoils my day whenever i think about it! How can I lose weight without starving my self? Anybody there who can help me??? Thanks!

Posted by meetscottewart01 6 years ago

Sensor to eventually measure weight ( up to 250 lbs)

Hi everyone, I am stuck trying to find a method or sensor to do what I want. Basically, I am trying to make a cheap flat weight scale- light weight and portable; thinner than using load cell sensors. I was hoping for a flat compression fabric or piezo resistive pressure sensor, but have not found what I was looking for. Does something like this exist?

Posted by appl314 7 years ago

Dual energy generation with magnetic Seesaw system and gravity with the help of 3 volt toy motor

This technology is based on  a Seesaw system and magnetic repelling principle Linear motion  .We can generate electricity with very little force with the help of this technology.This will be a radical step in the field of energy generation. In this technology there will be a balance system and two heavy weight magnets(high strength NEODYMIUM MAGNETS) will be attached with each side of this balance system as per diagram. As per diagram there will be two moving weights and these moving weights will move on tracks.These tracks will be fixed at the angle of 8 to 10 degree. Two magnets will be attached on the front side of these moving weights and these magnets will have similar polarity with the magnets of balance system. These moving weights will be attached with two gear boxes and these gear boxes will be attached with two generators. HOW THIS TECH WILL WORK? When one side heavy weight magnet of balance system will be pressed with the help of any kind of external force then this side will come down and repel its side moving weight due to equal polarity of magnets.due to repelling the moving weight will move forward .but when the heavy weight magnet will move upward then this moving weight will move backward due to gravity to get its position back. in this way this moving weight will work to run a gear box and this gear box will work to start a generator to generate energy. This balance system will also work to pass through their side copper coil due to linear movement and in this way this technology will generate Dual energy. WE will take very high strength NEODYMIUM magnets  for balance system. I would like to insist on some following points (1) The balance system will be attached with 'L' form crank with external PRESSING source. (2) The moving weights will also be attached with 'L' form crank with gear boxes. (3) Each side magnet of balance system will work one by one .When one side magnet will come down the another side magnet will move up .These magnets will come down and move up one by one to repel their side moving weight. (4) We can take as much weight as we can of these magnets of balance system .(500 kilogram to 1000 Kilogram or more) to pass through the heavy coils having 100000 turns or more.  (5) External source of pressing this balance system could be anything such as pressing with foot  or solar cell. WE WILL NEED ONLY 3 VOLT EXTERNAL ENERGY TO PRESS THIS BALANCE SYSTEM  AND GENERATE MORE AND MORE ENERGY.

Posted by vikram_gupta11 2 years ago

Fiberglass material help

I have a few questions about using fiberglass: what's the difference in weight? i see cloth coming in different weights like 16oz, 20 oz, 1.5 oz, and i'm not sure the difference and what weight i should use for what purpose. does the price go up as the weight go up, or vise versa? as a beginner what weight would work best for me? what's the difference between fiberglass chop strand mat and fiberglass cloth? aside from a resin, a hardener, and a gel-coat (is there any other type of releaser?) what else would i need chemical wise? what's a good place to find all these materials online for low cost? does anyone know a good simple tutorial for making a fiberglass shell from a form?

Posted by Everfalling 9 years ago

Please help to Calculate volume / weight of Alumium

I wish to make a mold that will take exactly 1kg (or whatever weight) by calculating the volume of the mold before construction. Therefore 1cc of aluminum will weigh? 1gram will occupy how much space? 1kg? I know 1 could take 1kg and use it to measure displaced water, but alas do not have even close to an accurate enough scale. Did try to figure it out from the data on wiki and other sites, but Double alas - it truly is Greek to me.

Posted by Karroo Oakey 8 years ago

Volume of gas from given weight of dry ice?

I'm rusty on basic chem. specifically, molarity, molecular weight... Dry ice, frozen CO2 is sold by the pound. I'd like to know by working formulas, how much volume a pound of dry ice will fill once it returns to gas. Carbon has molecular weight ~ 12.  Oxygen ~16.  But I don't recall what those numbers represent. One mole of gas occupies 22.4 liters, but how much does a mole of CO2 weigh?

Posted by Toga_Dan 3 years ago

branches,tape,wire and plastic sheet for a lean/2 shelter over night light weight

Branches,tape,wire and plastic sheet for a lean/2 shelter over night light weight

Posted by c p skeates 7 years ago

Rapidprototyped Weighted Companion Storage Cube

Here are the .sldprt and .stl files for the projectFor those of you who do not have SolidWorks, you can get the e-drawings file (wcc.exe) instead. Just download it and open it - no special programs needed.

Posted by Zorink 10 years ago

Finding the altitude of a ball using weight and time airborne

I was shooting my tennis ball cannon today, and i was wondering if there was a way to find out the altitude of the ball using the time it was airborne and the weight of the ball. I have no idea how to approach this, i dont know of any math formulas that we've learned so far that can compute this. I think it would have to factor in drag, gravity, the weight of the ball, and how long it was in the air. I just dont know how to do it. If anyone with a better understanding of physics and mathematics can help me out, or point me in the right direction, it would really help me out! thanks!

Posted by John Smith 8 years ago

Electro Magnetic Core Solenoid

Dear Friends, I need to lift a weight of 100 grams or 500 grams weight using a solenoid. I can use any current DC or AC. What is the procedure for calculating this. Please help me. Ramanathan PS INDIA

Posted by RamanathanP 3 years ago

Help me guys! I need to measure a motors lift weight(for a flying machine)!

So, I'm making a hover bike. Yea, dont judge me. And i have to measure the motor(s) needed to lift my bike. I have measured that my bike will weight about 75kg with me without the motors. So i need motor that can lift 75kg+(motors weight) at a power consumption of (something). Help please? :D

Posted by ТерентийМ 1 year ago

Robot wheel torque to weight calculation help

It's been a while since I've had a physics class and I'm scratching my head to remember how to figure out the following problem.  If I have a pair of motors for a robot wheeled base that have a torque of 6 lb/in each and, lets say, a 5 inch wheel, how heavy of a robot can I build?  I'm starting to build a robot base that I would like to future proof so I can add extra electronics and hardware and start with a battery with plenty of power (which of course means more weight).  I'd like to avoid building the robot and find out later that the motors don't deliver enough force.  Any ideas?

Posted by Grosseinator 6 years ago

Pan / tilt base

As some of you alredy saw im trying to make a Wired pan and tilt base....but im a bit a novice in all this.... MayB someone have plan or can make an instructables (or mayB there already an instructable on it and i didnt see it) on how to make a Wired pan / tilt base that would support the weight of a standart mini Dv Camcorder( not because im using a camcorder is just the same weight :P) and that would turn slowly thxKoax

Posted by koax 10 years ago

How to make Balloon Beach Tires

Has anyone made Sand tires for soft sand .. to move boat to the water ? .. weight capacity =500 lbs.

Posted by ~Frog~ 7 years ago


I am an bus-boy at an Italian restaurant and once monthly we have event called wine tastings, the waitress goes around and pours wine and every fifteen minutes or so a bus-boy that is brought in just for the event goes around and passes out food on a large tray. Because of labor laws and school (during the school year) the bus-boy's only job during these wine tastings is to pass out food and total the bus-boy is getting paid 6-7 hours wages for only an hours worth of work. Me being lazy and labor cost conscience think that it is just a waste of money to have a bus-boy when a robot could do the job for only the money to charge it up. My idea is to take the iRobot create and add a visual "People" sensor and a weight sensor to make a robo-bus-boy, or a bus-bot, I haven't really decided. In order to do this I will have to wire a series of LED's into a power source. One series of LED's must be blue, signaling a command to take the plates on the bot. Another series must be red signaling to place plates that are finished on there, flashing red LED's will mean that the robot is at weight capacity and will go back to a specified area to unload the trays by the normal bussers. Now the three problems I have not explained yet are as follows: Sliding plates, making a shoulder level, high-class, stylish stand, sensing when the bot is at weight capacity. To make the plates not slide I will use a clear rubber "gripping" substance that I have rolled up from when I had carpet in my computer room. To make the bot stylish and not at all an eye sore I will use an aluminum sheet metal and the waitresses trained style eye. For the weight capacity issue I will wire and electronic scale to the bot and program it to change the LED color when a certain weight is reached and in some cases when the max weight is reached will change the behavior of the bot from making laps around the dinning room to going to the wait station. When at the weight station the bot is reloaded and a reset switch is pressed and the LED change to blue; then laps are resumed and the process repeats till there are no more people left.

Posted by adrewmc 11 years ago

Please: Unpublish My Two Deleted Instructables

I deleted two Instructables, but forgot to unpublish them, before deleting. For those of you who are not aware of this, an Instructable should be unpublished, before being deleted: Click the "Publish" tab, then scroll down to the "Unpublish" button. Then return to the edit page to delete the unwanted Instructable. I botched this by erroneously thinking that "unpublish" and "delete" were one in the same.  Here are the deleted, but still published Instructables: https://www.instructables.com/id/How-to-Quickly-Field-Estimate-the-Weight-of-a-Stan/ https://www.instructables.com/id/How-to-Quickly-Field-Estimate-the-Weight-of-a-Stan-1/ But  this deleted one continues to appear at the top of the Google searches and continues to send internet users to a dead end, a blank page: https://www.instructables.com/id/How-to-Quickly-Field-Estimate-the-Weight-of-a-Stan/ Here is my current, and correct Instructable, but is crowded out of the internet search engines by the above deleted Instructable: https://www.instructables.com/id/How-to-Estimate-the-Axle-Weights-of-a-Standard-2-A/ I have already been informed by the Instructables staff that is probably an automatic filter issue, and that they would catch it after Labor Day and that they would unpublish and clear out the deleted Instructables, but this still hasn't happened yet. Any assistance would be greatly appreciated. Thanks  

Posted by shastalore 5 years ago


Just a spot to post random ideas for inventions. Example: If you took a crank, put the right amount of weights on it, and let it go from the top, it would go around forever due to the momentum. Anyone interested?

Posted by Epeoples 9 years ago

Weight Watchers Points Tracker

I'm not really sure how useful this is going to be to people, but as it's helped out several friends, I figured I'd share it here. <<>> A good portion of my immediate family and their significant others have been doing Weight Watchers.  My mom and girlfriend kept asking me when I was going to do it to.  Hoping I might get out of it, I told my girlfriend I'd do it to so long as she kept track of all my points.  She agreed, and so I was stuck. (To be fair, I agreed to Weight Watchers as opposed to any other diet as it seems more of a “how to eat properly/lifestyle” kind of thing as opposed to a “diet” kind of thing, so it also peeked my curiosity.  Like, “How much SHOULD I be eating compared to what I have been?” (Answer: A lot less)  To express this point, you don't have to lose weight while on the program, you can adjust how much you eat to gain, lose or maintain whatever weight you want.  It's kind of interesting to realize the amount of food intake it requires to affect your body.) After a month of letting my girlfriend track my points, I decided to do it myself.  I wasn't going to learn anything about what I was eating if I didn't take part.  Soon after I started tracking, I realized I needed some kind of automated system that I didn't have to constantly add, subtract and keep count of for days at a time.  All of the information was already stored in a fairly easy to follow spreadsheet my girlfriend made, so I decided to add a few formulas to keep track of things a little easier. To put simply, this spreadsheet keeps tabs on what you're eating, how many points it costs, and determines how many points you've used/have left for the day and week.  Like I said, I'm not sure how useful this is to anyone else, but I figured there'd be one or two people out there that might enjoy. <<>> Please let me know if you have any questions...I edited the files a little bit in hopes that it makes more sense.  Feedback is always appreciated. Who this is for: If you want to try weight watchers, or currently use weight watcher, but don't want to pay them, this might help you. If you want to count your calories in a point system, this might be for you. (This is essentially a glorified calorie counter.) If you want to keep track of what you eat, this might also be for you, though it may not be in depth enough. What this isn't: This doesn't tell you how many points things are worth, that's your job. A quick guide to points: Every 50 Calories = +1 Point Every 10 Grams of Fat = +1 Point Every 5 Grams of Fiber = -1 Point (you can't go below 0) (and don't forget to keep an eye on serving sizes!) This doesn't tell you how many points you should shoot for.  Again, your job to find out If you want to lose weight, there's guides online to figure out what it should be. If you want to gain weight or stay the same, figure what you need to do to lose weight, add five or ten points to that and see what happens. This doesn't track Workout points. I don't believe in them, I don't use them, I didn't add them. What this is: You enter in what you eat. You enter in how many points it costs. It will tally everything for you. Tracks Weekly Points which are bonus points that tally though the week These are a buffer in addition to your daily points They count down throughout the week (you don't want them to go to zero) ...use it for a couple of days and it should start making sense. What you need to do to make the most use of this: Download the appropriate file and put it in a place that's easy to access. I use different computers depending on where I am, so I also downloaded Dropbox and put this in a folder that's shared with all of my computers. Figure out how many points you should eat and enter that in the ??????? field on the spreadsheet (see the attached picture). Enter in what you eat, as you eat it, and see how things go. If you use this, and your weight changes, ten pounds more or less, make sure you re-figure out how many points you're allowed to eat. Voila! Now you don't have to pay $17.00 a month to a website to track your points for you! Attached you'll find the Open Office and Excel versions of the same file.  Choose what suits you.

Posted by StumpChunkman 8 years ago

Searching for Hardware

I'm desperately seeking hardware for a set of stilts I'm making.  I *need* certain weight grades, etc and am having trouble finding anywhere (online or in the real world) that gives me sufficient information on their products to be sure that what I'm purchasing won't let me down at a crucial moment, like when I'm surrounded by kids and might injure myself or them if I fall. I have looked on several websites (like McMaster-carr) and just can't find the info I need.  Any recommendations would be greatly appreciated.  Thanks!

Posted by dirtfaery 5 years ago

Can paracord hold a 103 lbs boy

 im 103 lbs. and i want to know if some really thin paracord can support my weight!!                       -M

Posted by GianniMora 8 years ago

Elevator or counterweight lift beds

Can anyone reverse engineer and make one of those elevator beds that are made with counter weights? They are becoming popular in Europe.  Ana White made one using garage door but it uses four corners.  The ones in Europe use only one wall or also add the ceiling across for the other end.  I like the one that spaceurc_com has which uses counter weights. BedUp_fr & espace-loggia_com seem a bit more difficult.  I can build a murphy bed, but these are a challenge and I like a challenge but it is too technical for me. Thanks for your help.

Posted by froman 1 year ago

lithium vs lead acid for gokarts

For electric go karts, which one is better (for the money)? Lead acid is by far much much cheaper, but it is much much heavier. With a heavier battery you need a stronger frame, which weighs even more. With all of this weight you need an even stronger motor to push it all. With lithium you can build a lighter, cheaper frame, and power it with a weaker and cheaper motor and still obtain the same speeds. Lead Acid batteries take up about 1/3 the weight of a gokart with rider (1/3 being the driver, and the other third being chasis and motor and such). Reducing the weight by about a third (honestly, lithium, batteries weigh like nothing) could have huge performance improvements. So, does spending more money on batteries, and saving money on chasis and motor equal out to spending less on batteries and more on chasis and motor?

Posted by guyfrom7up 9 years ago

cheapest and lightest boat possible

I want to know how to make a lighweight weight potable boat thats cheap, and also small yousing materials like plastic 44 gallon drum maybe. can you help me?

Posted by JACKBARRY 5 years ago

Working with pneumatics

Anyone know how to setup a simple air system? I have a pneumatic air cylinder with dual 1/4 inch NPT threads and a 6 inch throw. Ultimately I would like to have the cylinder extend when I flip one switch and release/contract under weight when I flip another switch. Think automotive airbag systems. Anyone know how to wire or plumb something like this up? Ultimately a compressor only option is what I'm looking for as a air tank would add too much weight. Any help would be greatly appreciated! Thanks

Posted by prototype27 11 years ago

Arduino project engenniring.

Hello my friends my name Mohamedi need sime help to my arduino project.itcontains an arduino,keypad and lcd.its about IMC(indice de masse corporelle)to input the weeight then height and mesure the IMC.which IMC=weight/height*height.actually everything was fine.i can input nulbers with the keyoad for the height and weight but when i d like to see the result i mean imc value it showd on the lcd ilc=-1.00 its like don t use the value what i put with keyoaf.plz i need help and i will send u later my arduino code that i made it by myself.thank u friends .

Posted by VladimirO10 2 years ago

Welded structure for 2 camera

Hello, I am building a sensor base one modified stock camera for agriculture survey,this sensor will be under a drone. I an looking to build the structure that hold this two camera. I know how to weld using Stick and Mig so i was looking to use mild steel plate, and bend it to get more resistance. but i don't know how to calculate the minimum thickness ( weight is really important). On the photo attached the red circle and opposite screw hold and the blue one is a bigger screw hole. Each of the two camera weight 250 grams and they are 10 cm heigh. All the best Vincent

Posted by VincentD48 1 year ago

Magnetic spec

I was wondering how big a cylinderical grade N42 NIB magnet i would need to pull a copper weight of 20 grams from 3inches? I dont know how to calculate so... If you could, that'd be great

Posted by lifelong-newbie 10 years ago

Medium weight quilting Fabric

Hello Everyone, I'm new to this type of project but I was looking to make a knife roll for a friend who will be starting culinary school soon. The one she bought for school is kind of dumpy and while it does the job we had found some great looking roll up ones online they were just kind of expensive. So i figured I could make her one for half the cost. It all seems doable. The wall I'm running into is the majority of my sewing experience has been stitching hems for Halloween costumes so my familiarity with fabric types is minimal at best. I wanted to make her a roll out of a fabric with a print on it and and finally finding the right one, at a good price point, I find myself worried the quality of the fabric may not be what I'm looking for. Basically what I found was described as "medium-weight quilting fabric 100% cotton" another one was called "broadcloth." I, however, have no idea what they are. The majority of no leather knife rolls we did find were made of canvas so I was hoping to make one of similar durability. To sum it all up I'm just wondering if this "medium-weight quilting fabric" is anything like twill, canvas, linen or musslin. I feel like those fabrics, especially the first two, would be quite durable for some like a chefs knife problem is the pattern I'm looking for isn't on those types of fabrics. Any and all help is greatly appreciated. Thank you in advance!

Posted by geekluve 8 months ago

Sea Fishing tactics?

So...I go fishing for mackerels a lot. I normally use feathers and weights. What do you use? floats? nets? and what type of bait do you use? 

Posted by NXTHacker 6 years ago

Revolutionary Knex Gun Competition 1 Results

The winner is a weight powered slingshot made by Hiyadudez. His explanation of how the gun fires; It's basically a normal gun rail, with a 'car' on the rail. Attached to the 'car' is string that runs to the front of the gun and over some pulleys. Attached to the other end of the string is a big weight/counterweight. When released, it pulls the car forward (the bullet is in front of the car) and sends it flying out of the barrel, but the car stays in. It shoots a blue rod 10-15 feet. Thanks to everyone who participated. The next contest can be found here.

Posted by Oblivitus 8 years ago

how to build a balance board with proximity sensor and arduino

Hey guys,  So I am trying to figure out how to build a virtual balance board( using processing and Arduino), that responds to human weight when leaning left or right. An object would be falling in the screen on one side of the balance board and the person has to lean to the other side to keep the balance.  I would like to use a proximity sensor to receive and send the data ( weight ) to Arduino. I may want to use spring board for enhancing the force. So i need your help with the Arduino part, connections and coding, I appreciate your help and guidelines. 

Posted by shanymz 5 years ago


Hi I am making a drawbot and was wondering how to safely attach it to the wall. I've seen options with fishing wire and string etc. However, my concern is that it won't be able to hold the significant amount of weight. What other alternatives do I have? 

Posted by hthnc-student 5 years ago

Robot Competitions?

I'm thinking about building a battlebot (ant/beetle weight)but I'm not sure if there are any competitions near me. I live near the San Francisco Bay area, if you know any competitions please tell me!!!  The date right now is June 16, 2012

Posted by Xthinker 6 years ago

Expressing my sincere appreciation......

I really love the jacket I just received in the mail from Instructables, it has a nice high collar to keep out the wind, and is about the correct "weight" (I rarely wear coats) for me.  It is greatly appreciated. 

Posted by Goodhart 7 years ago

Do Colleges look at Freshman year?

Do Colleges look at Freshman year? I'm just wondering cause I'm kinda freaking out about my english grade. I'm not sure what I have right now, but last marking period I had an 82%, and right now I've not been doing so hot. It's a weighted class (an "A" is a 5.0, a "B" is a 4.0, etc.). I know a "4.0" is perfect (but I'm starting to look at a "C" here, which is freaking me out), but perfect isn't so great anymore. I'm taking almost all advance/advance honors class (all my classes are weighted, except German 2 and some electronics course). Should I be freaking out?

Posted by guyfrom7up 9 years ago


Charging for the print book and the classes you are pushing on us is like Microsoft forcing us to download windows 10 and it bricking the screen or the $1500 computer then running a message your equipment does not match and you need to update and now you have ballast to put corner weight in the race car 

Posted by hdrideblue 1 year ago

Power assited dolly

Could someone recommend a dc motor strong enough but @ the same time gentle enough to be used for power assist. The item will be a custom built dolly used for lugging around camera equipment. The total weight will be approx. 50 - 75 lbs. Thank you to those that help.

Posted by sofiadragon1979 6 years ago

fancy dress tin of sardines

I would like to dress up as a tin of sardines and cant find a fancy dress costume anywhere.....it has to be uber laght weight as its for a festival and i dont want to have to carry it about....also waterproof.....and cheap......CAN YOU HELP ME!!!!

Posted by katylord 10 years ago

micro camera for Rc planes

If been wanting to film some of my Rc flights iv been thinking of two ways to do this: A.) buy a mini camera (not wireless could cause interference with other planes or mine although it should only affect 2.4GHZ or spreed spectrum channels which are designed to handle this kind of interference but i dont want to cause any accidents) or B.) Buy a cheep digital camera and mount it to plane Things to consider:Any thing will add weight to the plane which will affect balance (to solve this add weight till balance)I want to avoid wireless. How to power; battery's weight a lot and take up lots of spaceDragSize of cameraIf i do use micro camera where will it record too?Dose any one have any suggestions or ideas on the best way to do this on the cheep?Original form (it was origanaly posted in that group but it got separated) *update* i found a Camera called the flip video camera it has every thing iv been looking for its cheep about 150$, has a tripod mount, records 60 min of video, comes with editing software, runs on 2 AA batteries, and has a small (1.5inch) Lcd screen

Posted by i make shooting things 10 years ago