Topics


Watching the moon without the blurry view?

We put our biggest telescopes on the highest mountians and as far away from civilisation as possible.Reason behind is light pollution and atmospheric distortion.My days of playing with a big telescope in the garden every night are long over, life moves on once you need a job to make a living and something like a family.A while ago I had a look through a friend's telescope at night again when I was asked to give him a hand with the connection to Wifi, computer, printer and so on.Just imagine a big telescope with built in camera and Wifi.Checking the claimed to be astonishingly clear pictures of the moon we took I started to wonder...Being able to get a "close up" so to say of a little crater on the moon is nice.But I missed the clearity.If you take a picture with your phone or camera with perfect setting then you get the best possible picture.Not so much for the moon.Those who ever used a telescopic lens on the camera with some haze or fog will know how things in the atmosphere have certain effects.The moon is basically in a boring grey so BW cameras would be sufficient and also eliminate all the bad side effects of colored imagining chips.Other reasons than our atmosphere that can prevent a clear picture...The earth rotates and so does the moon, sadly this makes tracking hard over such a distance.Constantly changing brightness levels make the right exposure a nightmare, especially if you want to combine images to get a combined one without the shadows.So why not use what we already have to eliminate or compensate most of the issues we have?The hardware required for the tracking of stellar objects and computer control should not be an issue anymore.Once you position is syncronised with the current position of the moon the computer would be able to calculate and track with extreme precision.Using highly sensitive BW cameras might be a short term fix, better would be a chip and lens system only sensitive to the visible wavelengths with the least atmospheric distortions.The last would be to actually use an AI to track every pixel as it is taken and to compare it with previous pixels taken in that same spot to check for brightness matches and wavelenght.A simplyfied version of this is still in use for the restauration of old films from the analog days.The moving film meant that the pictures are not always perfectly in sync in terms of their position for the single images.If digitised like this the result would be a quite blurry film.An algorithm checks for the usual up and down differences and matches the positions so in reference to the selected frame rate it results in the sharpest possible image.For the moon there is always a majority of less distortion giving us the impression of the image we see.The key is have an algorithm that can detect and filter out those frames or if powerful enough pixels with the most distortion.Quite similar to the steady function on your cameras and phones these days, at least for the digital part.Just in reverse so to say.With perfect and smooth tracking a frame by frame collection of the area you want an image of would result in a much clearer and detailed image.A bit like HDR works now.You take a lot of images and combine them to get the best possible details on all light level and all colors.We only need BW though...How would an algorithm an an AI be able to make an image clearer and more detailed?Currently we already compensate for camera movements, brightness levels, focus, colors and much more through the AI of our phones.Where someone with a DSLR or the good old SLR and real film needs to find the perfect setting for a shot in the amount of time the shot is available we just click a button on the screen and the AI does the rest for us.Sure, instead of three or four pictures taken as quickly as your phone can do our MOON-HDR algorithm might need a few thausand pictures to create one good image and several hours to do so....But hey, it is up there every night and day, we can perfectly track it and automate the process over days or weeks if we want to capture a full cycle.If it that easy then certainly the big telescopes on those mountains would make use of it!!Well, they actually do, but for the sole purpose of deep space exploration.The movements of earth and in space and referenced to the possible errors of the hardware...We only need to care about pixels moving in a fixed image...The algorithm in the simple form works on a frame by frame base, the proper one on a direct pixel one.Either way the collected images will create piles where all checks match.More piles means more and more areas to overlay like in a stitching process.More overlays mean more "filter" used to check the original images against.The amount of light hitting the moon is pretty predictable and easy to factor in for an AI.The amount of light loss by the atmosphere at the time the image was taken could be factored in by the means of external atmospheric sensors.In the most basic form a "ping" with a laser onto a satellite on a fixed position between telescope and moon, or close by.The the google AI tries to find more and more links to make more and more reference about our internet use our algorithm collects pixel informations for a fixed position in a digital image.Quite simple once you think about it, isn't it? ;)It is just a matter of time and amount of data being collected.What was already possible in the days of converting analog movies into the digital world can't be too hard to do with an object that we can literally nail to the wall in terms of images....So why isn't anyone doing it already?In therory anyone could just hire some time on a quantum computer or old style super computer and use their own algorithms to sort the images.In reality that would cost you a few millions quickly.Graphics card are already well in use to do other things than bringing an image to a monitor.They used a calculating work horses - the bitcoin mining is a prime example here.Medical and scientific use another.Her it is quite ommon that clusters of powerful graphics cards do nothing than to run simulations.Already a form of AI, although quite simple.There is no huge market for telescopes, let alone big and powerful ones for the sole purpose of watching moon.Why bother, it is up there every night but all the stars and planets up there need to watched first....You will have a hard time finding a manual telescope with a simple way to follow the moon through the night.Watching the andromeda nebula on the other hand is quite easy...Worse still for the cameras.What is out there for use with telescopes or integrated into one is optimised to get the most light out of everything that is quite dim.Even your basic telescope usually has a moon filter already because the thing is so damn bright.Professional BW cameras would need expensive and custom made adapters to fit a telescope's optics.Last but not least is the tracking mechincs that are simply not designed to follow the moon, neither in its movement, nor the speed it is moving.But as said the tracking could be fixed with a custom version designed for watching the moon and a little microcontroller to drive very smoth running motors and gears.Is a fancy smartphone the way out for the images?Not really unless you want to constanly fight to get and keep manual control about the settings for the BW camera on the back.And they are not really designed to be used like that for hours every night.The only way out is size and speed.What would the perfect telscope/camera combination look like?Atmospheric interference means the light is scattered.And ideally that should be the only thing the AI has to worry about later on.Sadly, when we take a picture we need a certain exposure time to capture enough light.This mean mean collect something you compare to a fast moving object.You just cant get a clear image of spinning fan blades easy these days...Shorter exposure times are only possible with enough light.There are two way we use to get enough light for a given exposure time.Add some more light or use a bigger lens.Our standard telescopes are designed for eye pieces for, well, our eyes.Imaginea huge sized 40 megapixel sensor perfectly positioned in a telescope.Using only optics to compensate image distortion and to match the incoming image size to the sensor size.No telescope optics and camera optincs fighting for the right position, just perfectly matched for the purpose of takin images from the moon...If said sensor would be highly sensible most people would cry out and say the moon is too bright - but we want to use every bit of light to lowe our exposure times ;)Imagine a high speed camera only taking BW picture of the moon.At a speed of over 2000 frames per second....Why bother with overcomplicated tracking if you can take millions of images every night.You will only bother about storage and calculating problems after a single night already LOLThe amount of pixels of near identical properties in the same spot would soon be much higher than the amount of blurry pixels with different values.And the AI would still be able to match those blurry ones with frames from other images.But who really wants to see footprints and left over parts on the moon?We have been there, we have seen it...And if go up again we will have live coverage anyway from up close, so there really is no need for anyone to get a clear image of the moon from down here, or is there?

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

At least around here you will be stung painfully in your hip pocket if you want some half decent beef jerky.For some a snack, for others a survivial pack on long hikes, or just fun to eat....I like to do things differently from time to time and where possible save a buck or two.So a few years back I decided to invest in a food dehydrator that doubled up for other projects.There is a lot of traditional ways of making jerky, from selecting the right meat, over the right cutting down to marinating or seasoning the meat.But I did not find too many people using a dehydrator for the final step.A quick run down on my preparations:Meat cut into thin slices, then strips.Marinating for a day or two then a gentle air dry.Optional because I might be the only one who likes it: Covering with salt for a few hours to get a really salty taste.One problem when using a dehydrator with meat is that things can get messy.You only want to air dry on a wire rack or similar until the meat is semi dry on the surface but not until it already starts drying out.I do it inside and only for about 3 hours or so.Doing it for too long can mean much longer drying times in the dehydrator as a crust has formed on the surface already.To prevent excessive mess I cover my trys with non stick baking paper.This means only the top side will be dried until the meat starts to wrinkle up a bit.I dry at around 40°C and do a quick check on the meat every 30 minutes - each time a different tray.Once the top side feels dry to the touch I turn the meat over.If the paper got quite soggy I give it a quick wipe with a paper towel, otherwise I leave it all on there and hope some of it will stick to the meat when turning it over.Depending on the thickness of the meat the entire process can take 8 to 10 hours, thin slices dry in around 5-6 hours.What is the right moisture content for the finnished jerky?That is a question only you can answer!Some people prefer a mild jerky that is firm but easy to chew.Others, like myself, prefer the jerky bone dry and able to be kept fresh in an airtight container for years to come.I found the best way still is to properly age the finnished product before use.By aging I mean putting into a sealed container to even out the moisture level.Unless you rotate in very fancy ways a multi try dehydrator will always produce some pieces in corner areas that are less dry.The key is to have a large enough container so you can shake it all through once or twice a day and giving it a replacement of the air inside.Really hard and dry pieces will soften a bit while those really soft pieces will give their moisture away.Like this the meat is good for about 2 weeks from the day you dried it.Leaving it open in a well ventilated area with very low moisture level will fully dry the meat while it ages and prolong the best before date.Keep in mind that you don't want soggy meat to start with here, the overall moisture level should be well below 10% in the meat when done.If you fully dry it, especially with a bit of salt in it then the meat last for like forever.A nice way to figure out if the meat is fully dry is a digital scale.Take a sample pieve and check the weight, write it down.Place it in the dehydrator for another 30 minutes and check again.Less weight than before means moisture was lost and the meat you sampled was not fully dry yet.Same weight as before means it is dry.As a final step some people might want to put the meat outside on a sunny and dry day.If you do then please not into the direct sun and with a mesh cover to keep insects, dust and other things away from the meat.Cheating on the softness...Some of my friends like their jerky with a consistency more like chewing gum.Or like a slice of good, smoked ham if you don't like chewing gum.The meat selection and cutting direction are vital here.Think of it like bying a steak, the cheap, crappy one means it might be tough one to chew, the quality cut from the butcher will almost be certain to be a great experience.Sizzle or minute steaks are a quicky way to save some time making jerky but not so good for a nice and soft jerky.Of course, if you are on a budget you can cheat with manual labour and tenderise the meat the old fashion way before seasoning or marinating it.The marinade is another way you can cheat.Meat soaks up the marinade to some extend, especially if you tenderised the meat and got rid of the excess fluid that come out of it.Oil should be avoided for obvious reasons but you might have noticed that some commercial jerky always feels greasy.Plant or vegetable fats that melt below about 45°C can be used in a warm marinade to add some softness and in some case a better taste as the fat binds better to spices and seasoning.The downside is that you also need a drying temperature below the melting point of the fat and that it seals in a lot of moisture, which means much longer drying times.But you get a nice and soft jerky in return.The right cut...When you cut your own meat it helps to know what to look for.You want the meat fibres going in the right direction in your jerky slices!If you take a long piece of sirlion as an example than the fibres will run lenghtwise through it.Since you want to be able to rip or chew a piece off the jerky you want these fibres going sideways through your slice, not lenghtwise.In the sirlion example it means you cut thin slices of the "sausage" and from those you cut the strips.The wrong cut...If your fibres run lenghtwise through your jerky strips it will be very hard to get through them.Not only when you want to rip a bit off but also when you chew on it, it can be a very long chew...Some people though prefer it in short strips that are a bit thicker than usual.Like with tobacco in the old days they chew on it until the taste and flavour is out and discard of the rest.

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.

Hi guys! this is my first post here at Instructables :D I really hope someone will be able to help me! Basically the problem is described in the attached image. To be short, we have: - 1x smartphone (Android) - 1x bluetooth module (HC05 with breakout board GW-040 4 pin SPI) - some buttons and arrows... I've already managed to get the HC05 recognized by Windows as a gamepad (modifying the tag using AT commands). The real problem is that i'm stuck with that. I would like to understand how i can connect some buttons (let's say four) that will actually behave like arrows while playing. As far as i understood i need to use the PIO pins but unfortunately my knowledge stops here. Theoretically the code behind this is simple: when the button is pressed the circuit is close and a signal is received by the HC05 who sends the corresponding command via bluetooth. So if the up arrow is pressed, that pin will receive 1 (closed circuit) and the HC05 will send "UP_Arrow" as an instruction to the smartphone. The problem is how do i write down this code and put it into the HC05? since the gamepad tag is "universal" i guess there is some default code for things like this. I think it's the same thing they did with the MOGA... I also read that i could need a SPI-USB Download (something like this ) to use the BlueSuite, that seems like the software needed for this operation. Thanks for any advice!! P.S.: Some useful links i found while searching.. http://dextersstory.tistory.com/3 http://dextersstory.tistory.com/10 http://dextersstory.tistory.com/11 http://dextersstory.tistory.com/16 http://www.martyncurrey.com/arduino-with-hc-05-bluetooth-module-at-mode/ https://developer.mbed.org/users/edodm85/notebook/HC-05-bluetooth/ https://www.sparkfun.com/datasheets/Wireless/Bluetooth/rn-42-ds.pdf http://cdn.sparkfun.com/datasheets/Wireless/Bluetooth/RN-HID-User-Guide-v1.0r.pdf http://ww1.microchip.com/downloads/en/DeviceDoc/bluetooth_cr_UG-v1.0r.pdf

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



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....

I am writing this partly because of bed experiences with rental angents/landlords and as a general help.Here in Australia as well as other parts of the world it is common pratise that a real estate agent goes through your rented home multiple times a year to check if you keep it clean and undamaged.In most cases these visits go without any hickup until you move out.At this point agents often try to make your life a misery.Some expect you get the house back to the state it was 10 years ago when you moved - an impossible task.Carpet cleaning is usually done with a rented machine.This mean you pay a deposit for the machine and "rent" is made by the highly overpriced cleaning fluid you have to use with the machine.But more and more people see that a $100 machine from the discounter is a "money saver".So lets start with the main differences between a rented, commercial grade machine and those you find at the discounter to buy.The later comes quite small and in plastic, the commercial one is usually all metal and has huge water and waste tank.And lets be honest here, if a good vacuum cleaner sets you back more than twice what your new floor cleaning machine costs.....For me the real difference is in the sucktion.If you start with 10 liters in a commercail machine then you should expect to get over 8 liters back in the waste tank.The added waste often makes it seem much more though ;)The cheap discounter vesion however often struggles to get half of the water back out of your carpet that it drained into it!This is not only due to the weaker vacuum created but also due to the general design and lack of sealing the area that is sucked up.But during a hot summer week this makes no vital difference as it dries off anyway, or does it?Dryness and contamination....If you wash your clothes than you let them fully dry before you wear them.With a freshly cleaned carpet we often don't have that luxury and if the weather won't play nice you might end with a moist carpet for weeks.A proper wash of the carpet would require that water is actually flowing through the fabric.This is achieved by designing water outlets and sucktion areas to be in close proximity.However, most carpets these days are thin and flimsy, the underlay brings the comfort and often the required insulation from the cold floor.Fun fact: Most quality carpets in the EU come with a rubber or foam like backing which prevents that little spills go through and also leave the carpet basically dry after a cleaning.If the amount of water your machine collects does not get very close to what you filled into the tank then you end with a quite wet carpet and underlay.Cold from underneath and with basically no airflow through it.And if you ever removed an old carpet that was cleaned every few years you do know why you wear a protective suit, gloves and a filter mask on your face....It is simply impossible with a handheld machine to prevent water and contaminants from getting into the foam underlay of US and AU style carpet assemblies.Once fully dry there is little chance for anything to grow, but every time you clean the carpet you add the water required...I had it in two rentals that when I cleaned the carpets with a really good machine that stains from within the underlay came back up into the carpet.A job planned for a day then turned into three days of using heater fans and living in a sauna while washing carpets :(The same is true if you end up with fresh dirt or such on the carpet while it is still moist underneat - it gets worked ino the carpet and becomes even harder to clean.Is a commercial cleaning the better option?Sadly I have to say this highly depends on your agent/landlord and how much time and money you have.In some areas agents simply ignore the law and demand from you that the carpet looks at least as good as when you moved in.And if old stains you did not know about come from the filthy underlay a rented machine can come close to the cost of getting a commercail team in to do the job once you vacated.Either way you get an invoice for the service and a statement about the condition of the carpets before and after the cleaning.These guys come with a big van and before it fires up with water only the vacuum is used.Imagine a monster sized vacuum cleaner head on steroids that connects to an industrial sized evacuation fan in the van.It literally lifts your carpet from the underlay and leaves nothing loose behind.The actual cleaning and sanitation works the same way only with the big difference that the water is sprayed with pressure through the carpet and into the underlay.Final round is done dry and with vacuum only, means the carpets are dry enough to walk on them without getting wet feet.A complete dry state is usually reached within 2 days during the summer unlike rented machines that keep the humidity in your house up and high for about 2 weeks until back to normal.Main benefit of a commercail cleaning is that you won't get any issues with your agent/landlord unless you damaged the carpets or made them impossible to clean - ever dropped an ink jet printer refill kit? ;)If I do it myself with a reasonably good machine or a rented one : Do I have options for the cleaning solution used?Trust me, I had to figure that one out quickly when I moved into my first rental down here.4 bedrooms, entire house with carpet except for the kitchen and wet areas.They appeared reasonably clean at a first look but when I used a UV flashlight at night the story was shocking....In what must have a room for a baby the carpet looked like a psychedlic art impression under the UV light.The living room was not much better.As a result the rented machine ran out of cleaning fluid quickly.Bought 2 bottles that were supposed to be suffient for the house size but if you need several rounds per room.I "finnished" the former baby room and was one bottle down already.Called it a day and in the dark the UV light showed a slithly fades art impression but nowhere clean :(The shop had a heavy duty cleaning solution but I did not consider it with a price twice as high.Instead I wondered what would make my carpet different from my clothes in my washing machine....So I got a canister of Oxy-cleaner - sometimes called nappy soaking powder, or similar.Just make sure you get one that does not foam up too much.I used a bucket to dissolve a good amount of the powder before filling it into the machine - at about 40°C.What ended in the waste tank when using this cheap alternative looked digusting to say the least!With that encouragement I decided to make a new bucket with some added washing powder, just a tablespoon worth or just over.Washing powder for front loader does not foam up much, unlike the stuff for top loader, so choose wisely.That was, all counted, the forth cleaning round for the former baby room but after this the UV light showed a clean carpet that also had nice spring fresh smell thanks to the washing powder.Using the same appraoch of lots of oxy cleaner and a bit of washing machine powder in semi hot water made cleaning the rest of the house a breeze!When going slow with the machine it was like mowing the lawn, it left a clean path behind.Not all carpets might tolerate oxy cleaners though, especially if they are quite colorful, so do a spot check first if you never used the stuff to clean up a little spill of red wine before.And please keep some of the commercial cleaning fluid at hand to give the machine a quick wash through with it, otherwise the shop might ask you if you used non approved cleaning stuff with it ;)Tips for adjustable cleaning machines....Some of the rented machines come with several possible adjustments you can make.In the most basic form you can adjust the amount water used and how strong the machine sucks.Keep the sucktion as high as possible unless you actually want to pre soak the carpet.The amount of water should be adjusted to the type of carpet not to how dirty it is!You want just enough water to soak the carpet without going into the underlay too much.A clear sign of using too much water is if you waste tank is only half full when the water tank is empty.A few of the really good machines let you adjust the distance between the water outlet and sucktion area.In most cases there pre-set to what, from experience is the most commonly type of carpet in the area.Your might be different though...A greater distance means more time for the cleaning solution to do its job.This works especially well for thicker carpets with amount of water turned down to below 50%.For thin carpets a short distance is better as the water does not have to go deep into the fabric.Here you can even increase the water flow for very dirty areas without risking to soak the underlay too much.In either case you should check the machine before taking it home and if adjustable have the options explained to you in the store.Anything for really bad areas?The entrance area is often subject to whatever our shoes collected outside, especially if you have kids or playful dogs.A bit of oil from the road, some sticky residue of something, dust, small gravel and sand....Vacuum out what comes out first, then use a suitable, not too stiff brush if your vacuum cleaner does not have a rotating brush in the head.Use a spray bottle and prepare a solution of warm water with a bit of washing machine powder and a shot glass worth of methylated spirit.Slightly wet the soiled area with the spray bottle without saturating it.Use the brush to agitate the carpet fibres - preferably directional and with even strokes.If they are not wet in the deeper areas spray a bit more.Again: you don't want to soak it you want to wet it.Give it about 20 minutes on a warm day a bit longer if the insede temps are below 25°C.Check with your hand if the area is still wet, the alcohol should speed up the evaporation here.Before it dries up repeat the process and check with a paper towel if it picks up the stains already.If so then run over the area with cleaning machine.Best results are achieved if you manage to get the fibres wet all the way down with the brush and won't let the area fully dry off again after the spraying.How can I speed up the drying time?The only way to speed things up is heat and airflow.If outside humidty is quite high then you will struggle.Even in the summer times the humidity levels over night can get well into or even over the 80% region.Opening doors and windows then to get the carpet dry won't really help you.Best time to clean your carpets is actually at night because by the time you are done the sun is out and the humity levels much lower.On a good day below 30%.This is true even for the winter times.Put a few fans up and make sure the temperatures are well above the 20°C mark.If in doubt you have to turn the heater on.Once the humidity inside is sky high you open up all windows and doors to have an exchange of air.A few minutes suffice here unless there is wind at all.If it is a hot summer day you can of course just let it all open until the sun goes down again.During colder times pay special attention to cold areas, like your toilet, bathroom or in general areas that won't warm up properly.Even if the room was not cleaned the moisture can accumulate here and cause mold and mildew.If in doubt make sure the ENTIRE house is warm enough until your carpets are fully dry again.A humidity sensor or gauge certainly helps, two are better so you can check inside and outside at the same time.

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