# COMMUNITY

### Plastic recycled 3D printer

Planning to design a 3D printer that takes plastic bottles as input, I mean long narrow pieces of plastic bottles are fed as the printing filament. What will the difficulties in realizing such a design?

Posted by SHAMSUDHEEN MARAKKAR 2 days ago

### How the circuit will be, when we have solar panel(3w,6v) and dc generator of 6v?

Circuit diagram

Posted by prasad1909 2 days ago

### Construction of a robot learning to move in internal rooms

I am looking for a person who knows how to make a robot that will move inside the space, avoid obstacles and create maps of the rooms in which he works?

Posted by finder11 2 days ago

### WheatStone bridge

Recently i studied the wheatstone bridge in me physics book in class but i could not understand it properly. I asked the teacher about my confusion but he also dont know. i have posted the picture of topic(wheatstone bridge). My question is ;1.Why current I1 is following through point A to D in loop ADBA. 2.Why current I2 is following through point D to C in loop DCBD.My confusion is that why current are following through these two paths. As current always flow through level of a higher potential to a level of lower potential but here it seems opposite.

Posted by DabuHackker 2 days ago

### Error message while publishing Instructable

Posted by Thorondor95 3 days ago

### How to combine charge from solarpanel(3w,6v) and 6v d. C generator?

Combine charge from solar panel and dc generator and charge the battery.

Posted by prasad1909 3 days ago

### Slip ring

I am looking to build a rotating electrical connector, better known (in the electrical world) as a slip ring.The basics (my layperson terms) would include a stationary ring (fed by a power source AC/DC) and a rotating ring having 2-4 connecting points being in direct contact with the stationary ring allowing for power to be supplied to moving (rotating) devices connected to the connection points of the rotating ring.

Posted by Bill Haas 4 days ago

### Friendship Lamp

You may have seen these online selling for ridiculous priceshttps://www.uncommongoods.com/product/long-distanc...But it occured to me how easy this would probably be on arduino. Do any of you know what would be the bare minimum you would need to get this to work? I would assume you'd need them to connect to wifi, and just send a simple signal but I'm not quite sure how to implement this. Any ideas from those more knowledgeable in the particulars?Thanks,

Posted by gravityisweak 9 days ago

### Text window won't allow typing

Trying to add new instructable but the edit window will not accept any text input?Win7, Firefox which always used in past without trouble.Ideas?

Posted by stuffdone 10 days ago

### STATIC LED DISPLAY MESSAGE

My name is Simon Njoroge. I have successfully made a 9(rows) x 24(columns) LED display panel that displays a scrolling message that uses the attached code. The panel consists of course of LEDs, 3 shift registers, a 4017 decade counter together with transistors and resistors. However, I would like the panel to display a static message of a maximum of 7 characters for my project need. Kindly can someone edit the code for me? I followed the instructions from the following site:https://www.instructables.com/id/Make-a-24X6-LED-matrix/

Posted by NJORO1975 10 days ago

### Motion sensor and dimmer for LED strip 24V DC

Hi I am designing a table lamp using LED strip with 24V DC. I want to use a motion sensor with distance range maximum 20cm and 24V DC. Here is a link that explains what I am looking for. Any one who can custom made this type of sensor?RegardsMehranhttps://f2rq3.app.goo.gl?link=https://app.alibaba....

Posted by ManiA2 11 days ago

### Need help making this bunk bed a reality!

So, I want to do this project with my kids. They’re 5 and 7, and I want to start early in educating them that all this stuff that surrounds them is made by someone, and that someone can be them...Also, they want a bunk bed. :)Take a look at the photo...Can anyone help me turn this picture into a design? I’m pretty handy, but I’d love it if someone with the carpentry-and-CAD skill intersection could take a crack at turning this pic into something I can use...Best,Dutch

Posted by DutchFlyer 12 days ago

### How do I put do mp3 playback in a vintage phone please?

This might be a double post by me. sorryWondering if this is possible. I would like to make an old landline vintage style phone work so when I pick up the the earpiece, it automaticaly plays an mp3 through the earpiece, until its set down again. The style of phone I have is the one where the listening piece hangs on the side and the talking piece is part of the phone, the two handed style. Can anyone give some advice on how to do this please or point me in the right direction. Cheers

Posted by blind oly 12 days ago

### Opening and closing a small door

I want to build a small cabinet based on the TARDIS. I want the doors to open and close automatically and, of course, make the sound. It will only by 12 or so inches tall so I don't need anything big to do this. Ideally, I'd like to activate it by touch. My first idea was to start with the wiring for The Most Useless Machine and move on from there. Think that's a good start? Any better ideas on how to do it? The full build will be in an instructable.

Posted by mvealey 12 days ago

### I need help writing a program on Lego Mindstorms EV3

Whattup y'all, I have a Lego Mindstorms project underway, but I can't figure out how to write the program. If somebody out there who is familiar with programming EV3 could help or give me some tips, that would be great!The project is as follows: I built a start/stop timer for micro drones (i.e., a Tiny Whoop) so you can measure your time around your course. Start the program by pressing the center button on the Smart Brick. The setup measures whether or not the drone is on the starting block with the color sensor (either ambient or reflected light intensity). After the drone leaves the starting block, a timer will be set. The timer stops after the drone hits the stop gate, which presses the touch sensor. The time is then displayed on the screen, where you can view it, and then the program is restarted by pressing the center button again.My problem is that I have no earthly idea of how to make a timer with the EV3 software. If you know how, then screenshot it and send it to me, and you will be rewarded with a great Instructable in the near future!Auf Wedersehen, and thanks in advance!

Posted by Thorondor95 14 days ago

### Need Strong Wire Coat Hangers for projects

Where can the strong dark clothes hangers be purchased? If you purchased good ones from Amazon, please indicate which ones were the good ones...Thank you so much

Posted by DoraS14 14 days ago

### Wood varnish questions

I want to varnish this birch plywood platform to keep it as waterproof and UV resistant as possible but also keep it as close to it's original pale birch colour as possible. i've never varnished anything before so i've been googling for answers and i'm getting some conflicting information, i've been looking at different clear outdoor varnishes and most claim to protect against UV light and not leave a yellow tint but most reviews say otherwise and some general varnishing info articles claim that clear varnish can't protect against UV at all and i'd need a dark stain which i really don't want. so what can i do to protect the wood against the elements and maintain the colour as much as possible? can i combine varnish with other stuff? i found some clear 'marine varnish' is this heavier duty than normal wood varnish or something?is there an alternative to varnish that will have a similar effect?if i need to modify the platform later, cutting bits out or drilling new holes is it ok to just apply another layer of varnish to reseal it or will it need preparing in some way or some additional step?

Posted by ambientvoid 14 days ago

### Would a small scale model of your own house fit in the theme the Tiny Home contest?

Question for mods. Sorry if this is the wrong spot.

Posted by DIYJRAY 15 days ago

### Laser Engraving Under Glass.

Just put a video on Youtube about Laser Engraving under glass.A lot of people have made their own Laser Engravers using one method or another.I did the same using old DVD drive mechanism's a couple of Easydrivers an Arduino UNO and a 2 Watt Laser Diode and a Constant Current Laser Driver with TTL / PWM.Arduino has GRBL 1.1f loaded on to it and I use LaserGRBL (free program) to do the image settings, generate the GCode and burn the image.It's a good little machine, although the workpiece size is only 39mm x 39mm max.Eventually I'll build a bigger machine, but for now it does what I want it to do.Recently I removed the fan that blows the smoke away because it was whining a bit and getting on my nerves.So instead I tried using a piece of glass cut from an old flatbed scanner, on top of the workpiece.Seems to be good quality clear glass, I suppose it had to be if it was in a scanner.This stops the Laser from producing smoke and also soot.It does however produce a sticky residue on the back of the glass, but that can be cleaned off in soapy water.I was quite surprised at the results.Laser Engraving Under Glass.

Posted by StuartB44 16 days ago

### Will pay someone to make this for me.

Https://www.instructables.com/id/Counter-Strike-C4...I want to make this but I'm missing alot of the parts needed to do this myself. So I'm paying anyone who can make one look as close to the ones the others have made with working LED and everyone.

Posted by razz5 17 days ago

Posted by kbihmdigital 17 days ago

### We should have a Back to School Challenge!

I think that this would be a great, fun, and relevant contest for the months of August and September.

Posted by jseely23 18 days ago

### BUG: Not able to post an 'I made it'

The other day I wanted to post an 'I made it', well because I made it. But the function is not working. I tried it in Google Chrome, Google Chrome Incognito, Microsoft Edge, none worked. Cleared my browser, tried again, still no luck. Tried it on my phone (android 8.0) in Google Chrome, didn't work either.I've attached a photo of how it looks on the website. I'm able to press the 'I made it' button. Then the options 'add tip', 'ask question', 'post comment', etc. pop up. When I click 'post comment' (or another option) however, the area in where you should type doesn't appear. I also cannot add an image, because that button cannot be pressed.Hopefully you are able to help me with this.Ruud

Posted by ruudcreates 18 days ago

### Lightbulb!!!!! Anybody up for a Rubik's MP3?

Once again, I have had an idea beyond my capability to perform (I need to get my first job soon...): an mp3 player inside a Rubik's 2x2 cube. I am not sure if it would work while still being functional, but even if it can't move, it would still be cool! Can someone PLEASEPLEASEPLEASE do this and post it? Danke schon!

Posted by Thorondor95 19 days 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" !?

Posted by AbdChahidS 20 days ago

### Survey on the Workflow and Collaboration of Makers and Their Community

Im currently conducting research for my final year thesis which the aim is to identify insights gathered from this survey to understand the workflow and collaboration of the online and local maker communityMy aim at the end of this is to identify what could be beneficial for the maker community, whether it be in the form of a physical or online tool or even a set of guidelines to act as stepping stones during conceptualisation and prototyping for a user. You can answer the survey herehttps://goo.gl/forms/f2zjFwxyefxrKRpO2 This will be great help to get some participants and I hope my research and resources gathered will be a benefit to the online and local maker community.

Posted by Renegade Designer 20 days ago

### Keyboard problems

When I was cleaning my PC keyboard buttons G(because typing "G" character letter got some lags) and F(now it's not working I was cleaning Windows logo button and it's still working properly and in opposite side of this button is down when I loosen it, it skews diagonally.[img]https://i.imgur.com/pODvObr.jpg[/img][img]https://i.imgur.com/r6x5LyC.jpg[/img][img]https://i.imgur.com/OuotzUb.jpg[/img] It was when I was cleaning my keyboard with ear sticks slightly soaked in spirit(alcohol based liquid with transparent colour)[img]https://i.imgur.com/uBpBGEm.jpg[/img] can you help solve me this problem?How can I fix it?Should I buy new PC keyboard guys?

Posted by luke11685 22 days ago

### Hi forum hav 300wt wind gen at high wind is producing 18 to 20 volts before regulator am using sun yoba 20 amp mppt charge controller so looking for info on wind charge controllers the one i am using not correct mabe why no or little charge

I think i wrote details in title it did say topic or question

Posted by linny mac 24 days ago

### Am I missing something or is this battery charger just insane?

I bought this cheap charger that charges 2 Li-ion 18650 on eBay: https://www.ebay.com/itm/182586752606?ssPageName=S...But it charges them in PARALLEL!So if I put charge two batteries that have a different voltage, the charger will drain one and charge the other one at a pretty high current.If one battery is older, or has a different chemistry, it must not healthy to charge both.If I decide to charge only one, will it push too much current into it?If someone accidentally inserts one in reverse...If you want to charge 2 batteries that are exactly the same, make the charger a built-in feature in the device that uses the batteries, why disconnect them. Used batteries will always have a different voltage!I used to charge them with this cheaper charger, but I recently found out it charges them to 4.30V sometimes, and I want to be able to charge more than one at once...I don't care about charge time since I have a bunch of batteries always ready to use, prefer not to have our house burn down, but don't want to spend too much \$ on a charger. Watt do you think of these? I don't want to pay 8x the price to have a charger tell me the voltage and be limited by USB cable's current...https://www.ebay.com/itm/VONTAR-LCD-Intelligent-Ba... ("smartest" & most expensive. Still, only tells the voltage)https://www.ebay.com/itm/Liitokala-Lii-202-18650-2... (confusing)https://www.ebay.com/itm/4-Slot-Smart-Battery-Char... (not "smart" but seems the best IMO)https://www.ebay.com/itm/50-1000MA-Lithium-li-ion-... (Hmmm...)Because we all know what can happen with an 18650 gets angry... Though I have used this charger to charge 15 y/o 19650s that were 0V, back to normal and they are like new now...

Posted by Yonatan24 27 days ago

### Any idea how to build something like this Blood flow restriction device?

I saw this https://www.bfrshop.com/products/signature-series-...And now im thinking about building one, but i don't know what parts i should or can use for it. Any suggestions?

Posted by jonathans401 4 weeks ago

### Pyrolixer - can you help me figure out what it is?

I need to figure out the actual name of something I bought years ago under the name of "Pyrolixer" for pyro-effects (in Germany). I am also curious as to whether you could diy it.Let me describe what this is about: a liquid that you apply to paper and let dry. When you set fire to that area, it will smolder away, but only where you applied the liquid. From what I gather, it is used for magic tricks and similar effects. In addition to have paper smolder slowly, you can use it to reveal a message by letting it burn away specific areas.Can anyone help me out? "Pyrolixer" does not appear to be a good search term, and thus probably now the English/original/technical name for this. Any feedback is appreciated, and ideas about how to make your own even more so!Thank you!

Posted by Dominic Bender 4 weeks ago

### How to wire a 3 terminal socket ( i believe they are called 2 way sockets

I would like to put led mini lights inside of a liquor bottle lamp that i bought, my question is how can I connect this to a 3 terminal socket so i would be able to turn on just the mini light, or just the lamp bulb or both at the same time.

Posted by jeffsdad 4 weeks ago

### Search problem.

I wrote an Instructable on how to use the Verowire technique to make circuit boards. Rather oddly a search for "Verowire" does not find it. It finds other things which do not have "Verowire" in the title, but not the article that does. So perhaps I didn't need to bother writing the article, perhaps my search to see if it had already been written wasn't as conclusive as I thought.

Posted by andypugh 4 weeks ago

### I made it post keeps disappearing?

Hi all,I just added an I made it! post to an Instructable I followed. After I added it, it appeared on the site, but when I refreshed it disappeared. I tried again and the same thing happened. Do I need to use a different browser or is there some kind of hold? Thanks!

Posted by lollicopter 5 weeks ago

### I'm having trouble with my sketch regarding how to code , my stepper motor traveling to a limit switch then reversing and accelerating to another limit switch.

I'm having trouble coding at a point, I built an Equatorial Platform for my telescope so I can track the stars.I have a Nema 23 stepper( 1.8 * step, 200 steps per rev.) motor with an Arduino and a Easy Driver for my micro controller. My problem when I make my sketch I have the stepper motor running at 92- 104 RPM with a potentiometer to fine adjust, at this point when my platform hits a limit switch then I want to reverse the motor and accelerate it to 2000 RPM then decelerate to 25 RPM before the platform hits an other limit switch, then start the process over.How do I incorporate accelerating coding that to a certain point then decelerate motor before it hits the other limit switch. Do I need to find some timing coding ( for some length of time), before I want the motor to decelerate to hit the second switch. I don't want the motor running at 2000PM to hit the limit switch, I want it to decelerate before the limit switch. then reverse the motor again to 92 - 104 RPM. I'm a novice at coding with little electrical background. Your assistance is greatly appreciated. Jack Brockhurst e-mail jacam9803@yahoo.com

Posted by jacam9803 5 weeks ago

... are much improved. I like the fact they're all rolled into one list, that I can now respond to tips, and select best answers for questions, and upvote anything I so choose. Great improvements from an authorial standpoint, thanks!

Posted by makendo 5 weeks ago

### Foam Board/Cardboard Shoes

Hey, I was walking past my little sister watching PBS Kids and on one of the shows this girl was trying to make her own shoes. Out of cardboard. Lightbulb. The only reason that they didn't work is because they got waterlogged. I am thinking that with good enough sealing and strong enough glue, useable shoes made from cardboard are a possibility!The only problem is that I don't have foamboard or time to spare or a working camera at the moment. If anyone could carry this idea further than me, have at it!

Posted by Thorondor95 5 weeks ago

### New ideas for Tiny Whooping?

Guten Tag! I have a Tiny Whoop sitting around just begging to be modified in some way. I need some new ideas. Anything I successfully pull off will be published as an Instructable, so it'll come right back at you!

Posted by Thorondor95 5 weeks ago

### Hi, I'm a student and I'm looking for an experienced partner for help with my project :)

Hi, my name's Chaitra and i'm a 17 year old product design student in the UK, doing A level product design.As part of our coursework, we are required to find and interact with an "expert", a person with a good level of understanding of product development and technology.As you might expect, it's quite hard to find someone like this at random, which i why I've come here to see if anyone is willing to collaborate with me :)My coursework will be based on air conditioning, specifically regulating and purifying air conditions during sleep, so it will involve a good amount of electronics and physical design. As the "expert" of my project, we might exchange ideas and offer suggestions to improve the project, and even maybe advice on the best ways to manufacture the final prototype for assessment. You can be as involved as you want to be honest, I appreciate that everyone is busy so you won't be able to commit a huge amount of time to this, but maybe exchanging emails around once a month? I might send over some sketches / cad files over email for you to evaluate and suggest some improvements or ideas on, nothing more than that.If you're willing to help, please answer this topic so we can work something out! Thanks a lot :)PS. this is my first time using instructables, if I've submitted in this wrong place or something, please let me know

Posted by chaitrakawathekar26 5 weeks ago

### 15W laser

Help help help! Ive just fitted a 15w laser to my cnc 3018 and I cant get the laser to switch to low power mode. It just wants to burn everything! How do I fix it? Ive attached two pictures, one of the laser and one of the board. The board is a woodpecker GRBLO 9. Please if anyone can help me I would be eternally great full.

Posted by MattK171 5 weeks ago

### 3D Printer use

I was wondering if anyone would do some printing for me. I don't have the item designed yet and wasn't really wanting to buy a 3D printer just for one idea so I would need some help designing it and what format it needs to be in.

Posted by wsround 5 weeks ago

### Site takes me to malware

I was interested in going to the site on the off grid solar panel that I recently got an email about. The reference take you to a malware site

Posted by richardnml 6 weeks ago

### Pro membership for exchange of donations for a friend fighting cancer

I'm organizing a gofundme campaign on behalf of a friend, mother of three young kids, fighting advanced stage cervical cancer . And I have many pro memberships to exchange for donations. For a \$5 donation, I will give you a 3-month pro membership, \$10 donation a 6-month pro membership, and \$20 donation a 1-year pro membership. I thank you a million times for your kind help!

Posted by babybayrs 6 weeks ago

### Question

I've bought 3 ebikes one a Raleigh select,p/assist, one a throttle type, but wires on 1of the other bikes I've bought,the wires that lead into hubmotor are cut they don't seem to connect via a hole in wheel axle/spindle,so need help please,also the p/assist Raleigh can it be converted to throttle powered, as its a very old ebike with a sanyo hubmotor? Thanks...

Posted by AlanW131 6 weeks ago

### Arduino color sensor 34725

I was using color sensor 34725 with arduino to detect colors but it seems it is working a bit strange i have uploaded the picture of the data i gather from my experiment here are the confusing things1.why green value is also high when i place sensor on blue paper?2.why green and red color are significantly more in yellow as compared when they are place on their own color.and so on, i mean the color sensor does not seem to work properly

Posted by DabuHackker 6 weeks ago

### Can't access new mails in inbox or reply to messages

My inbox shows new messages but I can't access them and they do not show in my message list. I tried to reply to an old message as a test and could not do that either. I tried both IE and Chrome. any suggestions?

Posted by Mr. E 6 weeks ago

### Pov display with arduino

I was making pov display with 10 leds using arduinobut it seems it is not working as it shouldhere is the codehttps://hastebin.com/etovafuvab.cppi would appreciate an kind of help

Posted by DabuHackker 7 weeks ago

### Launch Stats Not Working

11 days ago I reported that the Launch Stats on my members page was not working ... it was working but suddenly stopped. Others have the same problem too but to date there has been no response from those who manage the website.Reposting as perhaps my first post has been missed?

Posted by lingib 7 weeks ago