Topics

Watching the moon without the blurry view?

Topic by Downunder35m

how can I embed images in an instructable ?

I have read a thread detailing image embedding using https://www.instructables.com/id/How-to-Embed-Photos-in-an-Instructable/ However, I can't make this work : I upload the images. I embed them using the img html tag. The image is correctly shown in the edition window. When I press "preview", the images are no longer shown. I have tried different sizes and formats, some have briefly worked (= were shown in the preview window), but all ended up disappearing at one point or another.

Question by IverB    |  last reply

Relay with small in size

I have a relay with an Outline Dimensions:(15.5x10.5x11.8)mm 5V,3A--> Switching voltage 230VACDatasheet is given above..could you suggest the similar capacity with small in size (not a solid state relay) relay ??i was search website like MOUSER,LCSC .didn't find any suitable one.

Topic by shavanwe0    |  last reply

Three Dual Voltage Output Circuit required

I have an 30v 0 30v 10 amp with 12v 0 12v 1.5 amp AC Volt Output Transformer. I required +24v 0 -24v and +12v 0 -12v and 05v DC Voltage, How can i taken these three output using this transformer. I am using a audio board so its required less than 1 amp output capacity only, But in transformer capacity was 10 amp. I want to to know excess amp will affect the board or Not ?Kindly sent the idea and Circuit diagramThanking You.

Question by ragavan123

Why or why not does .9 repeating equal 1?

I already posted this as a regular question, but someone told me to make it as a burning question, so here it is: HI! I am wondering if .999...=1? I mean if 1/3=.333 and 1/3+1/3+1/3=3/3 and 3/3=1. So wouldn't .333...+.333...+.333...=1? But it actually equals .999... not 1. I googled this question and I got many different answers ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ For example...(someone wrote): I'm not really into math, but a friend brought something up to me today that really seemed very strange. (For the duration of this post, .999 will mean .9 repeating unless otherwise specified- just for the sake of ease) .999=x 10x=9.999 10x - x = 9x 9x=9 1x=1. .999 = 1. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Someone else wrote: Numbers are fake. They are a manifestation of our minds to describe something, similar to words. Just because we say "red" doesn't mean something is red. what is red? Languages and math are very similar. Math is universal...at least for our planet though. .999~ does not = 1. But what .999~ repeating represents, does in fact equal what 1 represents. No-one will ever be able to comprehend infinity, os its time to stop trying. Think of space and the universe. IT IS GROWING. how can it continue to grow with no stop? what is there to contain it? WE need something to contain it in order for us to understand it. We need a stopping point, but there is none. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Another person wrote: In your proof that .333...*3=.999... you forgot to include the fact that .3333... is NOT 1/3. 1/3 if not a number that can be turned into a decimal in any way. I thought someone might like to know this fact. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ And the last person wrote: Just a pedantic point the equation for differentiation is given by lim x->0 [f(x+h)-f(x)]/h, it has the minus sign. It is after all just telling you the slope and is no different really from doing simple trig using the tan function. Here you just take a really small triangle. As to the 0.99~ thing, this is really just writing the supremum (spelling might be off) of the numbers less than 1. Just think of it as taking the smallest number 'n-word' than 0 away from 1. They are not identical for if they were we would not have a continuous number line, but rather a dashed one with lots of wholes in it. I could simply argue that 0.99~8 is just as close to 0.99~9 as 0.99~ is to 1. For those who really want to understand go and look up supremum numbers and the axioms of the real number line. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ So who is correct? Do you agree that .999...=1? Or .999... does not equal 1?

Topic by Pizzapie500    |  last reply

Using two 12V batteries in series with both a 12V and 24V output

I have a tornado shelterthat I have wired for both 120V AC and 12V DC. All of the lighting is via 12V DC while the AC is used for recharging the batteries and running a 1500 VA UPS system that powers a small TV and radio. The UPS system normally uses two small 12V SLA batteries in series. To increase the run time of the UPS I want to use auto batteries instead of the small SLA batteries normally used. In order to cut down on the cost of batteries I want to use two auto batteries, one 100AH battery used for the main lighting and a 50AH battery in series with the 100AH battery to provide the 24 volts for the UPS system. The UPS system will only use the two batteries when the AC is out which is normally rare. Do you see any problems with this setup providing I install a diode in the UPS battery feed to prevent the UPS from recharging the batteries and use separate smart chargers connected to each individual battery? I feel I have overlooked something but I can't seem to put my finger on it.

Question by Uncorkvet    |  last reply

Is the KNEX gun community dead?

So there has not been a post in the KNEX forum section for weeks about KNEX guns and It is getting so slow and dead around here that I could not stand it any more so I thought I would post a topic to see what others think. Are any of you working on stuff? I know some KNEX gunners have moved to YouTube but there is still very little content also a lot of people have left I know years ago everybody was saying that the community was dead but there was a nice jump in activity in the last year or so but It seams that stuff is dead as meat around here know. I found this community to be are very welcoming and fun place on the internet and I would hate to see it dead for good. Is there anybody that has plans of posting again? I just want to know how things are going has everybody lost interest or just grown out of this hobby? I hope that we can come back to life but I don't know will 2015 go down as the year the KNEX gun community died? Hope all is well with all you KNEXers!

Topic by sonic broom    |  last reply

Cover image darkening Answered

Hello,I recently made an instructable and when i saved it, it always darkened the cover image so it made it really hard to see. I tried over and over again but every time and even with different pictures, after generating the image, it would make it really dark.I'm wondering if there is a way to fix this? I hope it does not affect my instructable as it is entered in a contest. I took a screenshot to show the difference, i might not look bad but on the contest its really dark.Contest linkInstructable Link

Question by Perfect DIY    |  last reply

how to reduce current with out affecting the voltage?

I have a 12V transformer and i want to hook it up to my NST but it has a current rating of 8A but my transformer is to powerful and the lowest voltage is 12V.

Question by Jimmy Proton    |  last reply

FPGA and video projector

Hi I want to use FPGA as source for a Video projector.Is it possible? And if so,Should I code it as when I want to connect it to VGA monitor?

Question by Saeid_haghighipour    |  last reply

How can i run 5 phase stepper motor without a driver

Good day all. i have this 5 phase stepper motor sitting in the garage for a while. how can i run this without using a driver, or expensive driver. i just want it to run clockwise and counter clockwise at low speed, no accuracy needed. i have a lot of arduinos here and a couple of transistors etc. my stepper motor is a VEXTA PK566AEM, .72 degree / step, 1.4A has a magnetic brake and a 7 wires

Question by YamaroE    |  last reply

Water heater with nichrome

Hi ... i want to make electric water heater with solar panel how much nichrome wire in lenght should i use and how much gauge of nichrome wire should i use. is that possible ... i heard about 32 gauge nichrome wire which can work on dc.... is that possible....

Question by nts06    |  last reply

My favorites count reset

Favorites of my instructable are zero. Was 59. On my last instructable more then 1k visualization. No favorites. I saw several instructables that had many favorites, now zero. Nobody signaled this?

Question by andrei.erdei    |  last reply

Title photo of project has disappeared. How can I solve this?

I tried to edit the title photo of my project in the cardboard speed challenge and now there is no photo at all and I can't figure out how to solve this. Any ideas?Note - this only appears to be a problem on google chrome

Question by Person074

How to Build a cheap small stone cnc machine?

So here is the thing, I have so much stone on my property that I no longer want to remove and throw them away. I wanted to buy small cube stones so that I can lay a driveway and make paths around.So instead of me going to buy which are expensive by piece and I will need a huge quantity, I am thinking about building a CNC machine that I can use to carve out the stones into smaller cubes until I get enough for my driveway. I have been looking for systems unfortunately these are huge and very expensive and unable to find smaller ones for my needs. I also need to know about the types of drill that I will need for specific types of stones. I need to be able to move the machine around my property instead of moving the huge chunks of stones.Here are some examples that I have been looking around Thanks

Question by Chamburn

servers are busy. Instructable failed to publish

About 6 times I've gotten that message.

Topic by Toga_Dan    |  last reply

Please i need a circuit diagram for a project

I want a circuit diagram for a project. It was a YouTube video and he actually did a very quick connection part which was not clear to me. Well i don't know more about the circuits (i am 14) so i wanted somebody to design a clear diagram for me to make the connections. Contact me on my gmail id babyumesh26@gmail.com

Question by Nithin Umesh Anchan    |  last reply

What size engine (electric) would I need to power a go-Kart at 10-20mph? (weighing 10.5kg) Answered

I would like to know what size electric, brushed engine I would need (eg.wattage, voltage) to power a go-kart that wieghs 10.5kg w/ wheels, exculding Batterys. The diameter of my wheels are roughly 250mm I am thinking of somwthing like a 34v+ motor? I do...do alot of electronics but unfortunaly I dont regulary use motors in my Projects. If you want?...as a bonus question what potentionometer would I need to use for a throttle? The Best awnser will get a patch. (if there is one!) Thanks Oscar

Question by oscarthompson    |  last reply

Best magnet size to coil size ratio for an electromagnetic generator?

What is the best magnet (neodymium - disk shape) size to copper coil size ratio for optimal electron production per one break/pass of flux lines across coil at a 1/2" distance? For instance, if magnet is 2" diameter what is best inner diameter for copper coil? Best number of windings? Best gauge wire? what are the best specs for optimal electron production before you reach "over kill". I know some things are variable like core material and magnet grade. I'm looking for an all things being equal kind of scenario. Also what would be the best thickness of magnet at 2" diameter? If anyone could point me in the direction of any existing tables or ratio information on this subject it would be appreciated. Thank you.

Question by BishopKnight    |  last reply

Interactive Surface creation, minimal implementation

Hey guys!This is my very first post in this awesome community. I am not a native make so please forgive me if I may cause any misundestarning with my post.I stumbled upon this video : https://www.youtube.com/watch?v=lvtfD_rJ2hEI started to thinking about creating a simpler version of this, with someones face as a 3D model projecting. My background is in computer vision, so I can handle very well the 3d reconstruction of someone's face from a 2D image.My problem is that I cannot seem to find a way to create the mechanism that will raise those bars and what those bars are going to be made of. Does anyone has any clue on how to create a simple mechanism with not a very complex design?PS: I can handle very well raspberries pi, motors and software.

Topic by konsalex    |  last reply

Cheap beef jerky

Topic by Downunder35m

Help with noob to cnc

So I'm totally new to cnc and would love to be able to build a CNC router just looking for some advice please, iv looked through most of the instructables and iv got some grate ideas on how to go about the build I'm just off a little with the electronics, are all in one control board any good or is it better to keep control and driver separately, iv found one board in particular that's got my attention Any help would be much appreciated thanks

Question by jmh474    |  last reply

Material recommend actions for realistic dinosaur suit for marathon

Hi all I'm looking to build a realistic dinosaur for a marathon attempt next year and I was hoping to pick some brains here to do it. I guess I should ask whether anyone here has a dinosaur suit, or whether anyone could recommend light materials that would fit the bill. Thanks in advance.

Question by billybonker    |  last reply

How to fix Windows 7 laptop after downgrading from Windows 10?

I recently upgraded  to windows 10 to try out the new OS. However I found that I preferred my old windows 7 OS better. Thus, I decided to revert back to my old operation system. I went into settings and under recovery found where it said "Go back to Windows 7" and clicked on it. I let it go about its business and when I come back, my computer no longer starts up. It repeatedly gives me an error along the lines of "The computer encountered an unexpected error. Windows installation cannot proceed. To install Windows, click 'OK' to restart the computer , and then restart the installation." But when I click okay, the computer simply restarts and I get the same message again.  The problem is that I do not have an external backup of all of my files because I did not expect anything like this to happen. If there is any way I can solve this problem without losing the files that I have I am all ears. Please provide any help or suggestions you can as I need to get my laptop up and running again. The laptop is an Acer Aspire 7750G-9807 running Windows 7 Home Premium. Please help, anything in greatly appreciated!

Question by Science102    |  last reply

Speed Control for AC Electric Motors

Can anybody tell me how to build a controller to adjust the speed of an 110VAC electric motor, ( ex: blower motor, fan motor ) I was cautioned about using a light dimmer. bill

Topic by broham    |  last reply

RSS feed source URL

It seems like if this topic has been left over the last years, but I´m still looking for an instructables.com rss feed source URL that passes the test on the W3C Feed Validation Service.I´m trying to show all instructables with a specific keyword on my own website (using a WordPress plugin like RSS Aggregator).Any idea someone?

Question by koen.michiels12    |  last reply

Can roundup be used for making anything like what stump remover can be used for?

Hi, Can Roundup be repurposed into something flammable, explosive or anything like what The King Of Random turns stump remover into?Thanks

Question by Disasterific    |  last reply

How do you trace electric wires in a wall, without tearing the wall apart?

I have a wall switch that I can't figure out what it is to. I have taken the front plate off and the switch works. There is electricity on the wires leading out of the box when the switch is on. Is there a way to trace the wires through the wall?

Question by Juliusredwings    |  last reply

how does pine and willow charcoal differ from plain old random tree charcoal when used in pyrotechnics? Answered

hello, i am starting up an online store, and am already starting to sell some of my pyrotechnic supplies, such as manganese dioxide and charcoal, but i just realised, on ebay (my online store is not an ebay store), people are only ever selling pine charcoal or willow charcoal! which doesnt make much sense since is a super fine powder and is made up of carbon. i need to know what makes these so much different from regular random tree charcoal that comes from just anywhere, and, is the charcoal i have now, which is of unknown origin, but mostly of from pine-like trees in the tropics, the same? i need to know if it makes any difference since i dont want angry customers demanding refunds because it isnt as good as other charcoal!

Question by oldmanbeefjerky    |  last reply

Instructables prize pack?

What is the instructables prize pack, besides the robot t shirt?

Topic by RiverFlame    |  last reply

Knotless way of tying a fish hook - how to animate it?

Recently I went to "fishing expo".Down here it is on some lake, freshly stocked with fish and on top of all the anglers you get stands with all sorts of fishing stuff to check out.Weather was not to my liking so I stayed dry under the tends and had some smalltalk.It was not long until I wanted to check some braided fishing line offered at one of the stands.And with nothing bad on my mind I took one of the hooks to test the knot strenght.The guys had a nice rig for it.Little did I know about their teaching intentions, claiming that a lot of people have no clue how to properly deal with braided line.Let's just say their way was way too complicated and time consuming for my liking.On a rocky boat you want to be able to do things quick and easy.It was a line rated for 25kg and with their best know on offer it lasted till 22kg until the line failed at the knot.Asked if I could test my way as I would like to know how the line would perform and my wish was granted.The line failed at 27kg and snapped quite some distance form the knot.....Never mind the 25kg rating....The fellow fisherman around as well as the guys selling the line wanted to know how I did my knot without actually making a knot.What was easy out there tunred into a nightmare at home.I tried my biggest hooks and a camera on the tripod but it is not giving me a detailed enough view of how the "knot" is done.Now I could try to make a hook template from some aluminium round bar and use paracord or a thin rope....Then I found a nice app for the phone that uses animations to teach knots.Is there a simple way to create an animation showing a "rope" and a hook with the required details and motion?Would love to share this way of attaching a hook to braided line in a way that is easy to understand and follow....

Question by Downunder35m

My laptop won't connect to our wireless router?but other computers will? Answered

So a few days ago my computer disconnected from our wireless router which im used to this happening so i just let it go i figured it'll connect again just like before...and now a week later it still doesnt connect. So far i have tryed doing a system restore, updated my wireless card drivers, and have done an automatic update from windows. Still doesn't connect to it at all so im lost..any ideas as to what is wrong or what i should do? im running windows 7 intel i7 and a intel wifi link 5100(i believe thats what it is?) and if you need more info let me know.

Question by tubanator-2.0    |  last reply

How do freezing food/expiration dates work?

There's a supermarket right next to my apartment, so I usually go there once a week to buy groceries for the next 7 days or so. I notice that a lot of food has an expiration date that is not far off, so it feels like I have to hurry and eat all of my meat and fruits in vegetables and then if I'm trying to stretch food for another week, all I have left is rice and some odds and ends. I don't know much about freezing/thawing and what you can and can't freeze. My question is, how can I learn about the proper ways to freeze things to extend their usability and not have to buy food again every week. Any pointers

Topic by SheldonTrever    |  last reply

HACK FOR AN HP FOLDABLE KEYBOARD MODEL G750?

I've got a leftover FOLDABLE KEYBOARD for an HP iPAQ (circa 2002) -model G750- that I'd love to use with my current laptop (an HP). This is a wired device with a broad, flat connector - not a USB terminal.  Anybody had any success in converting this or this type of device for use with full-sized current model laptops?  Maybe its a conversion plug or an adapter??  If you know where to get one these I'd like to know. Thanks, KEY~

Question by KEYTURNER    |  last reply

Cannot post comments or reply to questions

When I tried yesterday to post a comment, it displayed a message: " Oops, something went wrong! " Today, I tried to reply to someone's question, but it wouldn't work: " Oops, something went wrong! " He was able to post the question, but that was eight days ago. That means this glitch happened between now and then.

Topic by Techno_Bot01    |  last reply

Q: worn-down mtb cleats/pedals - welding fix?

Hi, the bike i brought from the u.s. over here to europe is falling apart (like me). latest issue: the cleats as well as the mtb-clips of the pedals are simply worn-out. i looked around online for new parts. that sh it is expensive. a friend of mine down in the valley has a welder... i am wondering if i can weld some seam back on (either cleats or fixtures, or both), and the file/ grind it into shape..... anybody doing that? thanks, yodler, from the mountains in spain.

Question by la xerra    |  last reply

can i send serial monitor data from ESP32 board to B+ via Bluetooth?

Hello guys how are you doing ?so I'm currently working on a project from long time ago that was devastating and depressing for me , i will tell you the idea and what progress I made through the past 6 weeks and see if you can lead or help me ,, so the idea is I'm currently connecting esp32 Arduino board with six senses , 5 of them are flex sensors and one of them is the mpu6050 sensor which reads the angle of x y and z I was able to connect those sensors to esp32 and read all the values on the serial monitor as you can see below the code and the serial monitor https://ibb.co/92qBsh0, now my next step that I didn't know how to do is : I want to send those data, the serial monitor data continuously every 6 second to raspberry pi via the Bluetooth of the esp32 to the Bluetooth of the raspberry pi in order to program those data , i want to program those data to an LCD and a speaker ,For example if I received the following values from the esp32 I want the Res pi to put a certain word to the LCD screen and and then convert it to speech through the speaker , I already connected the LCD to the raspberry pi. , but now how I can send the serial monitor data continuously to the pi so I can program it

Topic by bhyamen

Oops! We couldn't understand your request

I finished editing my instruct-able and when i try to publish after changing the thumbnail it gives the error that is showed in the pic attached.  I have tried multiple times but its giving the same error. OS : Windows 10 Enterprise x64 Browser : Chrome Version 54.0.2840.99 m (64-bit) Have tried attaching the image here using the new and old uploader but it isnt attaching too :/ Here what the error message states Oops! We couldn't understand your request. Please contact us to tell us as much detail as possible about what you were trying to do when this happened

Topic by Diy Tech    |  last reply

Making a gamepad with the HC05 bluetooth module.

Topic by HarryValenti    |  last reply

How do i eletronicle generate a 12v ac pulse to mimic a starter coil if a motorcycle

How do i eletronicle generate a 12v ac pulse to mimic a starter coil if a motorcycle

Question by ccook9555    |  last reply

What would I need to create a printer like this?

Hi I am interested in creating a printer that cuts cardboard.Its a simple flat surface and the printhead moves over the surface to cut the shape.Is there any DIY printer who's print head already moves like this so that I would not have to start from scratch? Or better yet, any anyone has a project like this already that I can take a look at?

Question by patchthecode    |  last reply

what is the difference between activated charcoal and charcoal briskets. Can regular charcoal be used in a filter?

Question by mistressdominastar    |  last reply

Hacking An Alarm Clock

My sister (yes, the one for whom I made earrings) wants me to modify an alarm clock to run a small electronic device when it goes off. Preliminary research has given me two methods:1) A digital clock with a 555 timer circuitIn this setup, a 555 timer circuit is used to translate the signal to an alarm speaker/piezo disk into a relay. When the clock goes off, the relay clicks, and any electrical device that is run through the relay has power.2) An analog clock with a transistor amplifierIn this version, the analog clock seems to just have a straight DC output to the alarm. The transistor is used to amplify the DC to drive the motor of a fire bell.Which of these would be easier to implement? The device I am supposed to use runs off of 3VDC, so I was just going to run the power line through the relay or through the transformer.

Topic by CameronSS    |  last reply

My images keep getting uploaded sideways... Does anyone know what's going on? Answered

I took them with my iPhone 3GS, and they are fine on my computer. They go to landscape mode when I upload to Instructables, however.

Question by DELETED_jakebaldwin    |  last reply

How to create a 10w load that turns on once the voltage has risen to 4.09vdc and above?

I want to top balance lithium-iron batteries however, all the BMS that I have seen are rated at 4.25v with an error of +- 0.05v. Is it possible to use zener diodes, diodes and/or 3.2-3.6v LEDs to create a load that turns on at 4.09v with an error of 0.05v?

Question by briandean2002    |  last reply

The risks of DIY carpet cleaning and how save a buck or two....

Topic by Downunder35m

Can we use HX711 with SEP 01

Dear All,I am new to arduino.I am trying to connect my ESP 01 with the HX711. I am managing a web server in ESP 01. When i call the scale.begin(DOUT, CLK); web server is not responding.I used PINS as follows#define DOUT 3 // Pin connected to HX711 data output pin#define CLK 5 // Pin connected to HX711 clk pinMy problem is, can we use ESP 01 with HX711? Can someone give me a clue on this please :)Thank you verymuch

Question by SatsaraG

DMX - Append

I have a "Dune" mini DMX controller 54 channel's and a Theatrelight 48 channel lighting board. I have seen some plugins that will merge, 2, 3 or even more DMX controllers on a HTP, LTP and Append. They seem very expensive starting at US\$500+ I'm in NZ. It is append that I think I want to do. Say the 48 channel are left as 1 to 48 and the 54 channel as 49 to 102. Is there a cheaper DIY way. OR is it possible to just reprogram the Mini to start from chan. 49. I've attached photos of the circuit board.

Topic by casrotherham90

Remote controlled Pager/vibrating device-compact and light

I am new to Instructables and was hoping for some help. I have been reading through many posts and projects to find what I need, but still need help. I am trying to build a vibrating remote controlled collar to signal to my deaf dog. I would like something very compact that has a small vibrating motor in it that also works at a small distance, not more than 50 yards or so. I only need one setting, two would be great if possible. I just want a small transmitter, (size of a garage door opener) with a single or two buttons to produce a small vibration, and maybe a more intense vibration, to get the dogs attention when he is not looking at me. From there, he is trained to visual hand signals. Any help on how to build this, and build it as LEAST bulky as possible? I have seen a few instructables I am trying to piece together, but I am not an electronics person, have done a few projects like building an egg incubator...So far I know I need a transmitter and a receiver, a power source, which I was hoping could be smaller than a 9volt battery, and a small vibrating motor, possibly the minidisc or bullet type that runs off 3V? Not sure if that would even be strong enough, but my dog is pretty sensitive. I am not opposed to spending a little money, as the dog collars on the market are either cheap garbage for around \$20 or good quality but have way more unnecessary features than I need and cost a whopping \$200. Thank you very much!

Topic by DaveB154    |  last reply

Cinderblock - To paint or not to paint

I always had this question in my mind.  Was the cinderblock designed to breathe?  In other words do we want the moisture to go from one side to the other in case of cinderblock walls (say in the basement walls?)  Logically, I would think that the answer is that we want to prevent the moisture to go from one side to the other.  If that is the case, why the cinderblock makers do not make waterproof cinderblocks by adding water proofing chemicals during the manufacturing process? I would greatly appreciate your insights on this subject.

Topic by kabira    |  last reply