Microbial instructable on the cheap

I'm interested in this instructable on isolating plastic degrading bacteria but the author doesn't appear to be active at the moment.I have no experience in this area. Any ideas on if/how could perform a valid experiment on the cheap? The only two prohibitively expensive items seem to be an autoclave (I'm assuming I could use a microwave or pressure cooker) and the Hass Broth: The solution used to feed the bacteria containing all their required elements except carbon, which they get from the plastic.Would it still be a viable experiment if I gave the microbes a banana peel or something and hope they're still hungry for plastic? Also can I get away with using a cheap milligram scale?I know this isn't a typical type of question but any help would be appreciated. Thanks!

Question by Refinity    |  last reply

Step Down Voltage converter for my AV receiver bought in US to work in India?

Please advise? Planning to use a Step Down Voltage converter for my AV receiver bought in US to work in India.Need 240V/50Hz to be converted to 110V/60 Hz. Also the AV Receiver works on 480w, read that the Watts needs to have at-least 3 times of the AV receiver. Will the Frequency change?

Question by sivan0925    |  last reply

Food Saver V3230 Vacuum Sealer Repair Inquiry

I have a Food Saver V3230, the top rubber gasket over the liquid tray inside came loose. The manual says to contact customer service, anyone had a similar experience, know how to repair? Thank You

Question by Cgf44646    |  last reply

Convert broken metal bandsaw blades to hacksaw blades

My son-in-law had a broken metal cutting bandsaw blade. I did not want to bother trying to weld the broken blade, grind it smooth, and then try to temper it. I used a 12" hacksaw blade as a guide and drilled holes in the broken band. Cutting to length was easier than I expected. I used an ordinary tin snips. Drilling was easier than expected, too. I got three hacksaw blades from the band with a few inches of surplus.

Topic by Phil B    |  last reply

Car Wash with Arduino

Hello community,I'm glad to be a member of this community, and I hope I can contribute and add value to you guys. I'm planning to build a car wash from scratch using ARDUINO. Any ideas on type of motors, sensors, etc. since I'm new to programming and I took a quick course on Python and that's it. So please if you have any insights on this let me know. Thank you all

Topic by MIX l مكس    |  last reply

What is the best glue for attaching cardboard to metal? Answered

I am always creating all sorts, so i ask you out there, whats the best thing you have found? If you specify a US product, a small description would be great..

Question by gmjhowe    |  last reply

What is the best glue for plastic to leather?

Last winter I ripped the plastic sole from my skiing boot, and I would like to reattach it. It looks like it was originally held on by glue, and that is what I thought I should use.Any idea on what type of glue I should use for this?

Topic by Sedgewick17    |  last reply

If I win a competition, how do I know if it will ship to my country?

I live in Spain, and I entered a competition, If I win, will the prize be shiped to spain?

Question by AliceM49    |  last reply

how to do black oxide at home?

 I have some machined steel parts I would like to black oxide to prevent rust and to make look nice. I would like to know the chemicals involved to make the immersion bath for room temperature black oxide.

Question by high05    |  last reply

Electric Bicycle Mod Using an 36 volt, 1000watt motor to make an electric bike. I have questions about rpm and torque. Answered

 I have done some calculations, with wheels who have a 75inch circumference, i have calculated that 444 rpm should get me going about 40km/h or 25 mph. I don't believe that this is right. I am also wondering what amount of torque would be good enough for this situation? The motor is 1000watts, 36volts and 3000rpm. I am planning to use three 12 volt car batteries to power the motor. I would be using a chain and gear transmission system to reduce the rpm. I am looking to have a max speed of from 50 km/h or 31 mph to 40km/h or 25 mph. I would really apretiate anyones help with this, so i could then finish this project. thanks

Question by NoNameCola    |  last reply

how do you fix a laptops charger input?

The place where you pug the charging cord into a laptop often becomes damaged. how can you fix this and stop if from happening again?

Question by pineapplenewton    |  last reply

URGENT - Storing lithium after it's begun smoking/sparking

Call me stupid, because I am, but I was extracting lithium from an old phone battery when it begun sparking and smoking a lot, I dumped it in some vegetable oil seconds after it started but it's vessel is still warm, and I'm worried it'll ignite, help me?

Question by JesseS161    |  last reply

Arduino uno: How to switch flashing patterns with a button

Hi everyoneI'm still learning how to use an arduino uno and if anyone could help me on this it would be greatly appreciated. Question: How do you switch between different flashing patterns (sorry I don't know terminology) on 4 LEDs with a single push button in an arduino uno?Extra: My aim is to program a bike light using an arduino uno. I'm planning to have 4 LEDs and a single push button. When the button is first pushed, the 4 LEDs stay turned on, and when pushed again they flash, when pushed again they change pattern e.g. scroll and so on until it finally turns off after the final push of the button. I have been able to test several loops but they just continue forever like expected. If anyone could help me with what code to use to switch between the flashing patterns that would be greatly appreciated. Thank you!

Question by Airhead1  

Crochet keychain patterns

Does anybody know where i can find some really nice patterns for crochet keychains?

Question by crochetfreak2004  

Sick Axolotl

We have a white Axolotl with pink eyes .. we recently went on a weeks holiday found our Axolotl on the floor not sure how long he has been there, he was still moist and alive so put him back in his tank. He will not eat... Last night he started shedding his skin. This morning he was floating on his side and you could see pink veins all over him. I took him out of the tank and put in a Tupperware container ...Now he has started to get white patches under his mouth, on his tail and side and on his foot ... please help .... what can we do as we don't want him to die???

Topic by DeborahB122    |  last reply

Converting speaker input to mic jack

Hello,so i did this project of a spy mic using the lm386 amplifier, i took the schematic from afrotechmods, and it works. what i wanted to do was modify this circuit in such a way that instead of letting us listen to the voices of that time, i wanted to make it work on a phone, so i could record the audio in my phone, the original circuit diagram is attached. i also added my modified diagram. i just want to know if it will work, and i wont end up damaging my phone. what should i do to make this work right? the ''speakers'' in the original diagram are just earphones, no high power speakers. any help will be appreciated, thanks

Question by walee    |  last reply

Is a good site?

I was just wondering if anyone here has ordered from before. I read many reviews and some said it was horrible while others said it was great. I already made a small order of almost $20, will it come or not because some people said their stuff didn't even come. Please just tell me what you think of it, thanks for your help!

Question by ikestarm17    |  last reply

To generate elect. is it better to have the coil spin within the magnetic field or magnets spinning inside the coil

Which is better for making a homemade generator powered by the wind? Tesla model suggests coil spins inside of magnetic field but most electronic sites suggest having the magnets spin inside the coil windings. Are more amps produced by having the magnets spin inside the coil windings instead. Couldn't you just use most any (machine pre-wound) coils from motors rated from 1 - 5 hp. and make your own rotor where the magnets spin INSIDE the existing windings from those motors? Helpful to me since they are already rated with rpm speed. Why would you make your own with so many used motors available?

Question by SpeedRacerTerri    |  last reply


Is there a time limit for how long after you publish an instructable, it can be entered into a contest? (if not, there should be...maybe a year) Is there a limit to the number of times the same instructable can win a contest? (if not, then it should be limited to once)

Topic by explosivemaker    |  last reply

Is there technology to monitor a security camera remotely with no internet connection?

I have had a couple of robberies at my deceased grandfathers home, which is empty and no one is living there, and it is about 40 miles from my home. I was wondering if there might be a way to set up a camera and be able to monitor it at my home, either on my computer or my smartphone. I do still have the electricity going at his home, but I don't want to also pay for cable for an empty house(thus no internet connection). Just wondering if there is any technology available in which the camera could somehow broadcast over the cell phone network maybe? Any answers are greatly appreciated.

Question by stevecinstrfme    |  last reply

DIY Circular knitting needles

I teach a knitting class at a federal penitentiary; while I've been able to get a lot of yarn donated, we still have very few needles (the only ones the inmates can use are wooden circular needles). I've been trying to make some myself from dowels and weed eater cord, but they look like c$?&, and the cord keeps coming out. If anyone has any ideas on how to make some, I would really appreciate it!

Topic by deesammom    |  last reply

Is there any way to stream a DVD or a Blu Ray disc from a home theater player to a tablet PC?

Folks, I've searched and searched.  But wouldn't it be nice to be able to put a movie in to your Blu Ray player and stream it via either WiFi or Bluetooth TO your tablet. I'd like to be able to do this as tablets generally don't have HDMI jacks and if they do it's only to stream content FROM the tablet. I'd like to be able to sit in my recliner and watch a movie on a DVD or BR I already own, while my wife watches something else.  Developers take note;  I contacted the WiFi alliance and spoke to a fellow there who hadn't even thought of the idea. If someone comes up with an application and/or a device that would make this possible they could  make some serious income patenting it.  Just give me a free unit to evaluate if you do :).

Question by Cliffystones    |  last reply

DIY Schematic with instructions for pest control

Would it be possible to get a schematic and instructions to build a dog / cat/ rabbit and ground squirrel repeller ? One with a volume adjust would be nice, so they can go anywhere outside my yard. I do have outside AC plugs... However, a battery powered with AC adapter would be ideal !! ?Here in Arizona, I have numerous problems with these pests. They eat my fruit and vegetable plants, tear up my yard, and tunnel in areas they shouldn't, like under the house foundation.Help anyone ???

Question by BDLP  

Waterproofing wood

I have painted an outdoor wooden table top. I need to waterproof it. Last summer, at the advice of my sister, I used spar varnish. That did not work in that the top layer of my table completely peeled up from winter rain/snow/ice. How do I waterproof the table?

Question by myrabowen  

How to use an LED Driver Cycle Flash Controller?

Can this device (w/o any other IC's) be used to sequence/chase LED lights.

Question by cgc  

RC car batteries 7.2v to higher voltage?

Hi, its me again and i was wondering if you guys could help me. Well i just got this ( electric off road truck and this monster is insanely fast. But i want a bigger battery. In the instructions, it says the trucks input is 7.2 volts up to 16 volts. But thats the problem, my dad and I are skeptical about putting a battery over 7.2 volts in there. I am hoping to get an 8.4 volt battery (;=2) like this 7 cell one but am still skeptical about even this 1.2 volt jump. Can anybody tell me if anything  will fry, or be perfectly fine.

Question by Thelonelysandwitch    |  last reply

Can anyone help with troubleshooting a tesla coil?

After working on a tesla coil off and on for a few years I finally finished building one, but it is running into several problems. The only problem that I can't figure out is that despite following the basic tesla coil diagram the toroid will not create a jumping spark; however the gap generator still produces a spark. The coil is running off of a 15kv nst with a gfi built in.

Question by Kaptia Teramo    |  last reply

Converting audio ouput to audio input for phone

Hello,so i did this project of a spy mic using the lm386 amplifier, i took the schematic from afrotechmods, and it works. what i wanted to do was modify this circuit in such a way that instead of letting us listen to the voices of that time, i wanted to make it work on a phone, using the 3.5mm jack, so i could record the audio in my phone, the original circuit diagram is attached. i also added my modified diagram. i just want to know if it will work, and i wont end up damaging my phone. what should i do to make this work right? the ''speakers'' in the original diagram are just earphones, no high power speakers. any help will be appreciated, thanks

Question by walee  

Course for 3D pen

Hi,everyone:I am a teacher in primaly school in china,work as teaching 3D and arduino . Do you knowing of the course for 3D printing pen and arduino for primaly school sthdent, where can I to get it? I would like to make friends with someone who works as a maker education. if you do so,please pencil your contact method to me.Thank you!

Topic by 378621421    |  last reply

Is my axolotl sick or hurt? Answered

Hello there, I have had a axolotl for a few months now and i have noticed he has a white patch on his side and on his head its white and sort of fluffy looking and i don't  know if something is wrong or is just color on his skin? I have added a photo of him (but its not to clear because i didn't use a camera flash on it) he is a Wild type i think and he lives in a 2 foot tank  on his own with heating around 20'c-18'c and a filter and i clean it all out very often and he eats things like worms, shrimp pellets, pieces of fresh beef or snails ( all of these i make sure are fine and healthy for him to eat) The only thing strange about him is that he has a few extra fingers on one hand (but he had that  when i got him). It would be great if anyone could help me with this question and could tell me if he's o.k and/or if you know what to to do. Thank you from, CrazyBassFisherWoman and Norbert the axolotl,

Question by CrazyBassFisherwoman    |  last reply

Last year I could receive comments by Individual Question. Answered

Last year I could receive comments by individual questions after clicking that [Follow Question] button.Work-around wonders like [Flag] that comment and thanks for extended time to text.BUT.... It is useless to provide a Best Answer, if the people involved are not able to Follow a Question action !!!!

Question by iceng    |  last reply

how to make a metal detector sensor for high sensitivity

Hi everyone Could you please help me... : ( how to make a metal detector sensor for high sensitivity examples of metal objects the size of 1mm the use of these sensors for metal detection in food security

Topic by RickyS18    |  last reply

Barackuda Internals

Alright, I grabbed some more internals for the latest version of the Barackuda. I can't believe it's already been over a year since the last time I updated my status update thread. It's sad that nothing much goes on here, but I'll still maintain activity as long as I have ideas. I bought a home in the summer and have since been doing adulty things but I've been looking for more hobbies, so I'm still interested in doing a K'nex gun building guide series for newbies. I otherwise haven't built much. But anyway. For those that don't know, which I imagine are few, the Barackuda (portmanteau of Barack as in Barack Obama and barracuda) is basically a compact bolt action repeater with a small, removable drum magazine. I believe this is the first time a magazine like this has been successfully implemented on a weapon. I spent years figuring out the design and trying to perfect it, never quite satisfied, but I really need to just throw it out there. I'll get full instructions eventually. Hopefully these will do for now. Sorry if some of the pictures ended up sideways. I was using my phone and rushing. Let me know if you'd like any other pictures.

Topic by TheDunkis    |  last reply

Will heating a zinc chloride solution made from reacting Zinc with HCl produce HCl fumes? Answered

I am going to make a solution of zinc chloride by mixing hydrochloric acid with an excess of zinc. In the experiment I want to do, I have to heat the zinc chloride. Will there be any HCl fumes?

Question by jarheadwithm16    |  last reply

How to test for nickel levels in soil, water and plant based food? Allergy sufferer needs serious help.?

I have an allergy to nickel. It causes severe blisters so I must avoid it at all costs. Unfortunately, nickel is present in soil and water at varying levels and is absorbed by all plant based foods. There is some literature out there that lists which foods are worse, but are vague at best, and simply avoiding all plant based foods is not a realistic option. I would like to know if there is a way to test soil and water for nickel and determine how much is present? Or is there a way to test plant based foods for the nickel levels they have absorbed? I have researched this extensively and can only find information about getting tested for metals within the body. Confirming this would not change my dilemma. I have to work diligently at avoiding any further exposure to nickel as I understand there is no way of removing this metal once it is ingested. I have seen many specialists and their help is not only expensive, but limited (due to a lack of research in this area).  Any help or advice would be greatly appreciated. If anyone needs reference material regarding nickel in soil, water and plant based food should Read This from Ohio State University.

Question by canucksgirl    |  last reply

The course for 3D printing pen and arduino

Hi,everyone:I am a teacher in primaly school in china,work as teaching 3D and arduino . Do you knowing of the course for 3D printing pen and arduino for primaly school student, where can I to get it? I would like to make friends with someone who works as a maker education. if you do so,please pencil your contact method to me.Thank you!

Topic by 378621421  

Electrostatic flocking machine

Hello all I want to make simple and very cost effective velvet flocking machine in which velvet powder will be attracted in one box from bottom to top so that it will be applied on the object. Since velvet has its own charge it will get attracted to positive end of electrostatic field. Any simple model by anybody? Thanks Manish

Question by mvbhavsar    |  last reply

Arduino Projects Without Any Electric Component?

So Yesterday I Ordered An Arduino Uno R3 ATmega328p So I Want To Learn Some Projects ASAP So I Can Show Someone That It Is Not A Waste Of Money.Are There Any Projects Which Don't Require Any Electrical Components?And Please I Don't Need One Suggestion Saying That You Can See A Light Turning On And Off (I'm Tired Of It).Sorry If This Question Is Already Asked (Link Me There).Or If You Know Any Article(s) Link Me There.

Question by VruttantB    |  last reply

How can i compress a biogas from a compost tank without risk of ignition.

I already have minor semblance of a design but, i always prefer to consult the hivemind before doing something potentially stupid(i'm missing enough fingers). so, big picture is to create basically a sealed septic tank tied into the water lines of a residential house, which would produce methane to be stored year round then used during the cold season. not so much that i could cut off the natural gas line, but enough to reduce the bill.the design so far is a gas line coming from the septic tank connected to a bladder sitting inside a large tube. once the bladder reaches a nominal capacity, it will trip a sensor near the top of the tube activating a compressor until the bladder retracts to a lower set optical sensor turning off the compressor. somewhere in this mix i have the intent to set up a large air filter filled with that "oxygen eater" stuff they use in food storage applications. as well as several o2 sensors in the main line set up to stop the compressor and activate a solenoid valve to make sure no oxygen ever get to the compressor. what i dont know, is what kind of compressor i should be using to avoid any type of possible spark. proper placement of the o2 sensors, and if a giant air filter for eating oxygen already exists or is that something im going to have to make the hard way.

Question by snowfox222    |  last reply

Suggestion - Allow us to edit/submit "Rich Snippets" meta-description in search engine results

Rich snippets are "the term used to describe structured data markup that site operators can add to their existing HTML, which in turn allow search engines to better understand what information is contained on each web page". In plain English, it's what you see when you search for something in google. While it might not necessarily help with SEO all the time, it does help any potential viewer know what the link is about, and whether it's worth clicking on. While the subject can be a bit more complex, all I'm referring to here is the meta-description. Currently, the meta-description seems to be, by default, the first ~300 characters of the Instructable (or auto-generated by Google). If you write any sort of intro, it probably won't be relevant to help understand the project at all (out of context). Suggestion - It would be great to allow users to submit a meta-description via a simple text box, perhaps on the "Instructable Preview" window where the Cover Image can be changed. If they want they can submit a 50-300 character meta-description that better explains what the whole guide is about, or if not they can leave it blank for it to auto-generate as is already the case.Being familiar with WordPress, this would be a trivial plugin. I'm sure a site as big as Instructables can see the potential benefits (increased click-throughs, reduced bounce rates...), while also knowing that it wouldn't be intrusive to users or particularly hard to implement.Just wanted to give my opinion. Like in the attached image, it can be a bit frustrating to have no control over the meta-description since it isn't always representative of the project. In the case above where it was auto-generated by Google, it doesn't give any incentive at all to click since it doesn't make much sense as a description of the project.

Topic by MillennialDIYer    |  last reply

"Bug" - Issue with image importer converting .PNG files to .JPEG

Update: posting this topic further illustrated that something weird is happening with how Instructables handles images. The image as shown above shows both left and right sides with the text blurry. If you click on the image, the left stays blurry (as it should because it was) whereas the text on the right shows clear and sharp. I give up on the root of the problem, but it's frustrating how the image quality gets messed up.I put "bug" in quotations since you never know if it's a bug, unintended side effect, technical limitation or external problem. I'll let Instructables be the judge. Regardless, I thought it might be worth bringing attention to since I'm probably not the only one to have experienced it.While I use RAW images converted to JPEGs in Lightroom for my main project images, which tend to look beautifully, I normally use Canva to design my title images. Mainly due to being able to add text, shapes or any other elements in layers. Canva exports by default in .PNG format, which is probably the most popular image format after .JPG due to its support of transparencies and lossless compression. For that reason it's normally preferred for header images and graphics. I tend to use a ratio of between 4:3 and 16:9 to make things easier for the file uploader, as well as a longest edge of 1024px since that looks like it's what Instructables wants so it won't be resized. Despite trying to make things easy for the uploader, my title images have always been the blurriest, noticeably more so than the rest of the images or the image uploaded. Today I finally did some tests and found out that on import of .PNG files, the uploader noticeably deteriorates the quality of the image when converting it to JPEG, even if it isn't resizing it. A picture is attached as evidence. It seems to particularly affect portions which are highly saturated or text, greatly desharpening it. It makes a good image look like it's been carelessly edited. For the image to maintain its quality, I have to take the original .PNG and convert to .JPEG on my own (Photoshop), and then upload the .JPEG to Instructables (instead of the .PNG). As a user, what I'd optimally like to see done is: Fix the importer to properly support .PNG images without deteriorating the images. It is way too popular a format to not accept. I do realize it might be a Canva color space or other such issue, but it probably wouldn't be limited to that program anyway. Nonetheless, if this isn't possible, I'd be happy for the system to simply not accept .PNG and to throw-out an error message telling me to convert the images on my own and only upload .JPG. That would at least avoid image quality being inadvertently affected. Make available an up to date FAQ page where all information regarding images is available: what formats are natively accepted, what is the optimal ratio for images, what is the optimal resolution for images, to what sizes an image is resized on import, or any other relevant technical image details. I've researched this multiple times in the past and there are a lot of people with the same questions in the forum. Especially when it comes to sizes and ratios (cut off images, etc). Most of the information is from years ago (ex. 2010) and cannot be trusted to be up to date. Up to now I've uploaded plenty of 18 megapixel images when it is unnecessary given that the largest size shown, I think, is "LARGE" size at 1024px (I believe). A place to educate ourselves objectively on this particular site's preferences would be appreciated.Anyway, thought I'd comment this since it was a relief to finally find out the origin of the problem.

Topic by MillennialDIYer    |  last reply

Best photo size for upload? Answered

What is the reccomended size of a image for upload to Instructables?

Question by sdudley    |  last reply

Is it possible to. Make a crossbow using 2 springs and 2 pulleys? Answered

I have this idea where you take 2 extension springs and affix them to both sides of a 2x4 and then attatch a steel cable to them which passes through 2 pulleys attatched to a 2x4 at the front of the first 2x4 the crossbow is then completed Too complicated? I will post a instructable soon Fidgety2

Question by fidgety2    |  last reply

strange fluid inside a rear projection tv i was pulling apart? Answered

So i was disassembling a toshiba rear projection for the fresnel lense, and figured i'd pull the rest of it apart and see what parts i could salvage, i got to the gun assembly (i think its called that) and was pulling one of the guns to bits to salvage the lens mount and discovered there was some sort of liquid between the gun and the lenses, it smelt strongly like alcohol and burnt when i held a flame to it long enough, i got some on my hands and my hands started getting a burning sensation so i washed it off and stored it in an icecream container can anyone tell me what the liquid is? why is it inside the tv/projection guns? 

Question by mammasboy    |  last reply

How to use a salvaged phone camera from Oppo Mirror 3 for other uses?

I salvaged this camera from Oppo Mirror 3 as the phone doesn't work anymore, I would like to use for other project, like creating a CCTV out of it. However, I don't how to connect to my computer or any other CPU (Arduino, Pi). How do I use this camera module?

Question by RikoH2  

Can I wire RGB LED flex ribbon with cat5?

I made 4 custom light boxes using rgb led flex ribbon, can I power and wire these using cat5 cable or is that too thin for 6 amp 12v power supply these things are going to? the longest run from one box to the powersupply will be 20 feet

Topic by Negativecreep0    |  last reply


Did anyone can slove this ????? You are going to make an item that's about time. You are free to interpret the term of time as you please. Examples may be special moments, repetitions, everyday events, or major events. Think about what expression the item should have. You can use shapes, colors, moving parts, technologies, humor, and the like. You can use the materials and techniques you want.

Question by Hellylili    |  last reply

can anybody ansewer ?s about howto direct wire or bypass the microphone jack on a gaming headset

a friend of mine gave me a afterglow headset that has a plug in mic that is broken. they sell replacement mics for 10 $ a pop but that's not happening here(not cheap just poor!).i need to just bypass the jack and hardwire it directly, an i would be grateful of any help slung my way! the jack on the headset only has 2 wires going to it with 3 contact points the plug on the mic has been bent over so far it came off, where there are what looks like 4 different colored bundles of wire which are paired together in 2 strands! so i kinda need to know how 2 wires(the headset) connect in 3 places to 4 wires(the mic)? my cam aint workin or id supply pics

Question by ripit