Topics


First time Author

I am refering here: https://www.instructables.com/community/First-Time...The previous answers in the post are quite confusing. What are the criteria to be a first-time author in a contest which gives a special prize to first-time author instructable?

Topic by crisdeodates    |  last reply


Convert AAA Battery power Headphones to become rechargable?

Hi,Im wondering if its possible to convert Beats Studio 1.0 Headphones (that use AAA batteries to charge them) to become rechargable?Are these the circuits i need?3.7V 300mAh Li-Po Rechargeable Battery5V MICRO USB 1A Lithium Battery Charging + Protection in one Board ModuleAm i missing anything else? thank you for your help and time

Question by frostieff    |  last reply


AT28C64B Answered

I am really having a big problem with that EEPROM AT28C64B how i can load the data from this IC ? .. i am not sure if i programmed it right ? .. i tried to connect the output to LEDS but none of them worked .. can someone explain how to write into the data ?! .. and the important thing how to read the data i wrote ?! .. how to use them ? .. thanks in advance

Question by mac00    |  last reply


Contest entry

Hi There,I created an instructable for the Assistive Tech Contest, however it seems I am unable to enter into this contest. Everytime I click "Enter", its asking me to create a new instructable.Please would you confirm if I may have already entered this? I'm thinking this maybe already in a que for review, possibly.Thanks for any help :-)

Topic by b33ma247    |  last reply


Do I need another powerbank?

If I have 2 devices that are rated for a maximum current of 4.5a and a powerbank which puts out a maximum of 4.5a, would both devices run off of the powerbank at the same time or would it need a 9a output for that to work?

Question by ambientvoid    |  last reply


what is this? identify my tool!? Answered

I had this for years, anybody got a clue what it is? most amusing answer gets a patch:-)

Question by crazyg    |  last reply


I Need Measuring & Marking Help

I have a plastic ornament that I want to mark out with a measuring grid. I have a compass, which I can mark the sphere out in fourth's, but my measurements are always off by an 1/8th of an inch. How do I measure this sphere with accurate marked grid? String, paper, scotch tape, laser cross-hair, T-Square & yard stick?

Question by elkaddalek    |  last reply


How do I tell if an 8th grade boy likes me?

Hi. I'm in 7th grade, but I like this guy and he's in 8th. He and my bestfriend, who is also in 8th, used to go to a different school together in 5th grade, and they dated. She likes someone else now, btw. But he had asked her out again the first week of school and she said no. Anyways, a few weeks ago my best friend asked him (with my permission) if he liked me. He said maybe. Oh, and we hang out in a big group at school (like during lunch) in a big group of 7th-11th grade people. My bestfriend and the guy I like both hang out in this group. But later him and my best friend talked again and my best friend said that he said he did like me. So my best friend told me that and said that he wanted to talk to me, so I went up to him and he nodded and me and walked away from the people he was talking to and walked with me across the field at school. I honestly cannot forget the way he looked at me when we were walking. I just wanted to melt. But then when we got somewhere by ourselves in the field where nobody would hear what we were saying, he just stood there and didn't say anything. The only thing he did say was "I guess she told you." and I was like, "yeah." So we walked back over to everyone else together and then the bell rang so we had to go back inside.  After school I talked to him again and asked him if it was true about what he said, and he said "maybe" again. Then he had to leave, but he was acting all cute and stuff before he left. <3 The next week we sat on the bus together and he was being really nice to me and all that. And he watched me put on chapstick, lol.  And then last week someone was like, "I think you guys are gonna get married when you're older!" we were laughing together at the time, so the kid that said that (we both know him)  made us shut up as soon as he said that. Then he kinda got awkward during the rest of the day... Sorry that was so long! Anyways, what do you guys think? Should I keep trying to win this guy over? Or what do you think?  Thanks!

Question by Raynihart    |  last reply


CHUCK help please.

CHUCK help please.Im searching for a chuck replacement for a 1944 Delta drill press. It has a Jaobs Supreme 5/8". Arbor is MT2 shank with JT3 small end. The supreme has teeth missing on the gear, the key holes are egged out and it will not open or close smoothly. Can't afford a new Jacobs so I'm looking for an Taiwan import or any ideas you may have.thanks

Topic by 4063ford    |  last reply


Can portland cement be mixed without sand or gravel?

I'm planning to switch from wood to cement because we are soon moving into a condominium where noise should be kept to a minimum. If yes, what is the ratio of water to cement? if no, can i mix it with sand only and what is the ratio. Thanks

Question by beehard44    |  last reply


GY6 50 cc chinese scooter won't start. What could it be?

Hi. I bought a 50 cc scooter that was sitting for some time. It's 2008 model and it had around 400 km when I got it. That's pretty low in my opinion. Well at first it was running fine. I mad around 100 km on the first day. Well the second day it didn't start. Thankfully my friend helped me and he said that my carburetor is dirty. He celaned it and scooter started up. I made around 60km on the same day with no problem. In the morning the next day my scooter wouldn't start. I tried to do the same as him. I cleaned carburetor and fuel filter but scooter still wouldn't start. It doesn't start electrically or kick start. It's like 5th day and my scooter still won't start. What happens when i turn it on:  - sometimes it sounds just like a dc motor spinning but nothing happens (there is no cranking sound)  - usually it makes cranking sounds but doesn't start  - when I let it sit for a while (for 30min, 1h, day ...) it makes a sound like it almost started up but then dies Thank you all for help! I would like to apologize for my lack of english words in engines and bikes field (not a native english speaker and I'm not specialized in those fields).

Question by matijalazic    |  last reply


How to return to 'ible in progress?

I started creating an instructable in the new editor, saving as I went. I shut down my computer and went to take pictures to add to it. When I returned and opened up Instructables, I can't seem to find where my instructable in progress is. Any guidance is appreciated. And, yes, I feel a bit stupid.

Question by skistler    |  last reply


Prize suggestions and feedback needed! What would YOU like to win?

Hi everyone! Here at HQ we're always planning contests, but sometimes we run out of prize ideas. :D I would love to hear any and all suggestions for products you guys would like to win! I'd also love to hear feedback about prizes we've offered this year - what did you like? What didn't you like? Do you prefer getting a shiny new electronic toy or a prize pack more suited to the theme of the contest? Have a suggestion for a contest theme? Check out this topic!

Topic by randofo    |  last reply


cheapest way to convert dc to ac?

What is the cheapest way to convert dc to ac.i need a cheap an simple solution.i don't need a circuit that convert 12VDC to 220VAC i need a 12VDC to AC circuit

Question by vina1991    |  last reply


Automatic water level control system with alarm

Construction of water level control system with alarm

Topic by Hero lad    |  last reply


Heating a winter garden pond with a car pre-heater!?

Anybody thought about heating a winter garden pond with a car pre- heater!? Here in the UK garden pond fish get really cold and more often than not ponds freeze up. Would you budding geniuses give this topic a little thought - would it work in a controllable manner?Thank you.

Question by TN1946    |  last reply


Is it possible to run a small gasoline car 100% on hydrogen alone ? Answered

Theoretically you can, but did anyone really do this with success ? Anyone knows of a link that has all the details for such a project ? I need to know how big the hydrogen generator should be and how to safely connect the hydrogen supply to the motor, how to mix the hydrogen with oxygen and what ratio, is it better to mix with pure oxygen or just normal air or maybe hydroxy just works fine ?! How to prevent firebacks... too many little details to be discussed.. so anyone has any usefull info just throw it at us please to try to make a really efficient 100% hydrogen powered car.

Question by Nick_Zouein    |  last reply


Prizes??

I'm new and heard there were prizes for some comptetions. Is this true?

Topic by isitflamable451    |  last reply


Drafts???

Someone please help me I've been trying to figure  out how to navigate to my drafts folder for some time and I cannot find anyone else who has had the same issue with a solution. I started and saved a few drafts and watched the little "Saved!" message pop up but how do I go back to edit it again? I'll take a screenshot of what my page looks like right now.  I can't tell if this site is just poorly constructed or if it's just not working properly at the moment.  Or maybe I'm just missing something obvious! I don't have any previous experience using this site, I'm just using it for a project for college. I tried using a different browser (I'm on Chrome but I also tried Firefox) but that didn't help. I also looked through some "how to make instructables" classes but it's all about how to like.. take good pictures and stuff and not how to use the website's features. :( I would really appreciate some instruction! Thanks in advance!

Topic by M3lleee    |  last reply


how can i make copper carbonate? Answered

Hello , am trying to get a hold of some copper carbonate but its much too expensive. now i have some raw, and untarnished (beyond normal anyways) copper laying around and want to know if theres any way i can convert this into pure copper carbonate, with minimal impurities such as copper oxides and such. is there a way to do this through electrolysis perhaps? also, is there a way to convert copper and copper oxide to copper hydroxide which i can simply add carbonic acid to to copper carbonate? also whoever answers my question will get a best anser form me , guaranteed

Question by oldmanbeefjerky    |  last reply


Fun things to do by yourself with nothing but yourself.? Answered

I need some fun things to do when you dont have anything.

Question by bubbaman22    |  last reply


How much is granite worth?

So today I went down to some local woods with a hammer (Geode,granite,marble hunting) and I saw that 2 friends of mine had dug up a 20-30 pound rock. It was a heavy little bugger. So I swung the hammer at the rock for half an hour until I had about 30-50 small chunks of granite. The main reason I broke it was so that me and my friends could split it. One of my friends didn't want it. The other friend wasn't allowed to have it. All that was left was me. So I then realized that it was way too much to carry around. So I told another friends that didn't help do anything but polish the freaking thing with a brush *pauses and laughs* that I would give him all of it but 3 peices. I'm starting to regret saying that. So I wanna know... is granite worth anything/expensive?

Topic by Flumpkins    |  last reply


Hanging flower box

I have a large front window that goes down to sidewalk, and we want to add a hanging flower box. Any thought on best way to attach a flower box? Attach to metal window frame? Add plywood to window to attach box? Any input gladly appreciated.

Question by CarolynV23    |  last reply


How can I melt a lot of snow quickly? Answered

At work, I've got a mound of snow piled up about eight feet high and it's right over a staff member's parking spot.  The sun is helping to melt it and I began to shovel a little bit out each day, but I was wondering if there were any other handy tricks to melt it quickly. I can't use fire and I don't have enough salt. Any ideas?

Question by iPodGuy    |  last reply



How can I power up an LCD display with a lemon battery to show a message?

I've seen lemon clocks and would like to do something similar but I want the LCD to show an 8 character message as soon as it's powered up. I know how to use an LCD with Arduino but Arduino won't work on such low voltages. Any help would be greatly appreciated.

Question by MacandChi    |  last reply


Proyecto de dispositivo Bluethoth

Necesito saber que tipo de integrado debo utilizar para realizar un dispositivo que se comunique atraves de un modulo bluethoth y al mismo timpo active una bosina dentro del mismo ....todo esto con componentes lo mas chiquitos posibles

Question by RayneAl03  


Question

Hi everyone and respected teachers i am jimi. and i felt in great problem i'm new one who is using ccs c and i took some tutorials about basic programming for available chips are PIC16F877A and have also ATMEGA32PU. related to PIC16F877A i wrote a program in CCS C and its compiled well with no errors or warnings and got a hex file/ output file checked on proteus8 downloaded/written on PIC16Fxxx by TL866 programmer but the hardware still not being functional i'm struggling to find a solution but i'm failed. and i have written 4 programs in different examples compiled with no error but hardware is not functional can you help me to take contribute in my first step ?? one of the code is given below i shall be thankful to you#include "D:\DEVELOPE CCSC\two inputs four led\two input 4 output.h"Void Main() {Setup_adc_ports(no_analogs);Setup_adc(adc_off); Setup_psp(psp_disabled); Setup_spi(spi_ss_disabled); Setup_timer_0(rtcc_internal|rtcc_div_1); Setup_timer_1(t1_disabled) Setup_timer_2(t2_disabled , 0 , 1); Setup_comparator(nc_nc_nc_nc); Setup_vref(false); #use Delay(clock = 8000000) Output_low(pin_b0); Output_float(pin_d0); Output_low(pin_b1); Output_float(pin_d1); While(true) { If(input_state(pin_d0) == 0) { Output_high(pin_b0); Delay_ms(2000); Output_low(pin_b0); } If(input_state(pin_d1) == 0) { Output_high(pin_b1); Delay_ms(2000); Output_low(pin_b1); } If(input_state(pin_d0) &(pin_d1) == 0) { Output_bit(pin_b0 , 0 & Pin_b1 , 0); } }}

Question by JimiO3  


Makita cordless mitre saw 36 volt

Can anyone help to convert 36 volt makita cordless brushless mitre saw so it can be used from mains power ?

Topic by GregW181    |  last reply


Help!

Woke this morning to TV going on/off. Figured it's a few years old so went bought new tv. Everything was good. A few hours later the tv now is going on/off. Nothing else is doing anything. All lights, fan, xbox, etc work.

Question by 19carebear81    |  last reply


Is it possible to blacklist projects with certain materials?

Is it possible to blacklist certain terms or materials? I'm sick of spotting interesting projects only to click them only to find out that a 3D printer is required. Seeing as how I'm not filthy rich and never will be, I'd really like a way to block these projects from showing up and making me depressed. Is anyone aware of a way I can do this, maybe a firefox extenson or something?

Question by GrugsAdvantage    |  last reply


12v battery indicator with flashing leds showing state of charge when recharcing

Hi guys. I have a 12v lead-acid battery and i want to make a circuit, which can show me state of charge of the battery with 5 (blue or white) leds. When the battery is in use, it should light up all 5 leds at 100%, 4 at 80%, 3 at 60%, 2 at 40% and 1 at 20%.Now when i want to charge the battery i would like them to light up in order, as it gets recharged. Lets say it has 0% capacity left and i plug in the charger, the first led should start flashing/blinking. When the battery has charged to over 20%, the first led should turn solid and the second led should start flashing, which indicates that the battery has recharged somewhere in between 20-40% battery life. This goes on until it has reached 100% and all leds should light up solid. When the battery is in use (no charger plugged in) the leds should flash like this, just turn off as explained in first.Furthermore i would like to add a switch, which can turn on/off the indicators (but not the battery and charger itself)To see what i mean, i saw that soundboks, has added this feature in their batteryboxes: https://www.youtube.com/watch?v=rlY8B2dHYD4 (watch 0:50)Is this something someone can help me with?

Question by SimonR223    |  last reply


Creating copper nano particles

Be it conductive ink, decorations or just a special pigment for your paint project, Copper is nice.Only problem is grinding this soft metal fine enough to be of any good use.A not so well documented feature of food additives is that they often have "unwanted" side effects.In our case E300, Ascorbic Acid or just Vitamin C.So how to make copper nano particles with it you might wonder?Prepare a well saturated solution of Copper Sulphate, you find the blue crystals in the gardening section together with fertilisers.It is best to use destilled water and not plain tap water, if in doubt go at least with the demineralised stuff for batteries.Adding E300 either dissolved in water or directly as crystals will start a nice reaction.The copper solphate is reduced back to metallic copper.There are a few problems though...For best results you need a saturation copper sulphate solution, low temperatures and a magnetic stirrer.This produced the finest particles for me at around 5°C.But even warm or at room temp the constant sirring is beneficial for even particle sizes.The ascorbic acid is used up in the process as well.You can start with a little and see how much you end up with in terms of a layer of copper particles at the bottom.Adding more E300 will cause a "rain" of fine copper particles - once this no longer happens you know the copper sulphate is used up as well.A dark greenish color of the solution will indicate this as well.Getting the copper out of the glass...Keep in mind the copper is extreme fine!As long as it stays in the solution it won't oxidize or otherwise react.Once out and in contact with just water and air oxidation happens quickly, after all it is pure copper...I found removing the watery solution and then adding destilled water to repeat the process is a good start.The waste from the first round can still be usefull though...In the final round I try to remove as much water as I can and then add methyled spirit to prevent the reactions.You can use oil as well or do a quick vacuum drying and store it in a sealed and oxygen free container.What to do with it?As a condictive paint with the right binder it only needs some rubbing with a smooth tool to create a conductive cover with a low resistance.In a clear paint or resin it provides some stunning color effects.You can even dust the dry powder onto a freshly painted surface to get a copper look.Leave without a top coat and you quickly get an old copper or even green look.If you ever wanted extreme fine metal particles you will come up with more ideas...Like shielding or sintering....

Topic by Downunder35m    |  last reply


How can I produce infrasound using a bunch of piezo's?

The industrial music pioneers Throbbing Gristle reportedly created something that was capable of producing sound at frequencies below the threshold of human hearing (infrasound) by wiring together a bunch of piezo's. I'd love to do this myself, but don't currently have the time and resources to experiment myself. Any chance that there's someone out there that has replicated this? Preferably someone willing to write up an instructable?

Question by Subvert    |  last reply


Contest Judges Needed

Hi everyone! We need to update our judge list with some new names!To be eligible to judge, you must have posted at least ONE instructable. Let us know which contest categories you're interested to judge in the comments below: CookingWorkshopCircuitsCraftLivingOutsideTeachersThe judging process is fairly simple and involves looking at contest finalists and rating them on a scale from 0-9. Judging is open Friday afternoon through Monday night. Time spent judging is around 30 minutes to two hours - it all depends on how thorough you are!If it’s not a good time for you to judge when we contact you, no worries. We always try to assign more judges than we need in case something comes up.You can find out more about the judging process here.Don't worry! Judges are selected after finalists are selected, so volunteering to judge will not affect your chances of being a finalist in any contest you enter.Thanks for helping us keep the site awesome!

Topic by jessyratfink    |  last reply


There is a strange problem with my freezer... Things come out smelling strange. Answered

I have a freezer full of various foods.  Most recently I have found a bit of trouble with my meat.  I pulled out some ground beef that I put in at the beginning of October and after a thaw it smelled bad.  I recognise the smell as it happened once before but went away with no apparent cause.  It is technically safe to eat the meat (I did last time.  It tasted revolting and I had to throw the whole meal away.) but with the taste and a chemo-weakened person in the house I won't be risking it anyway.  I can tell it takes time to acquire the smell because it didn't have anywhere as strong an effect on the piece that was only up there for one week.  No one could tell the smell was there after the cooking process. Does anyone know of any likely causes or solutions? To get the obvious out of the way: nothing else rotted and left behind the smell during a power outage. it wasn't rotten when I put it in Thanks, Karl

Question by finfan7    |  last reply


How to make a bullet proof armor vest at home ? Answered

Bullet proof armor vests are a very basic need for the news reporters in working in hot war zones. Being a freelance reporter, I would like to know how can one make a bullet proof armor vest by himself.

Question by muhammajunaid    |  last reply


Fluxgate sensor and ardunio

Hi , I want run a flc100 fluxgate magnometer sensor with ardunio nano and send data to pc with bluetooth , please help me , thanks

Topic by parisa2000  


EPM-07s network analyzer

I have a network analyzer (EPM-07s) so I`m asking if I connect the mod-bus port with my implemented gateway (MCU) by this way I can get any data ?? or the data might be encrypted ??

Question by BassamS9  


Flc100

Hi , I want run a flc100 fluxgate magnometer sensor with ardunio nano , please help me , thanks

Question by parisa2000    |  last reply


Flc100 magnometer

Hi, can you launched sensor fluxgate flc100 magnetometr with ardunio and conected to pc wiht bleuthos? thack you very much

Question by parisa2000    |  last reply


How to Build combat suit? What materials are needed for bulletproofing? Cheapest materials that can be used safely? Answered

I have some designs I'm mainly looking for recommendations and references for the materials needed. Also need some advice on kinetic energy replacement for high drops and jumps. Frame material needs to be light weight and strong. Outer armor will be interchangeable. Weapons are still in development more posted later. Also all metals must be nonferrous.

Question by DaVinciStein    |  last reply


12volts battery charger

Hi everyone, Please I need a simple 12battery charger with automatic transfer switch that can charge one battery while the other is in use With high current

Question by charlesO62    |  last reply


Waterglass or Liquid Glass

Back when I was a kid I had a little chimistry set and part of it were instructions on how to create your own chmical garden in a jar.The metal salts only "grow" in the areas with lots of water while being cured into somthing more solid when it contacts the waterglass.Quite nice trick for kids of all ages.Another and commercail use is as a binder for refractory uses.On a home level you can just crush up some vermiculite and perlite to create solid and light weight fire bricks or plate - with just waterglass as the binder.Although for this purpose you want a higher amount of cat litter in your mix.Cat litter???Yes, cat litter is the same as silica beads but it dissolves much easier in the reaction with sodium hydroxide, or drain cleaner.60g of crystal cat litter, 80g of sodium hydroxide, 100ml of water.Mix it carefully and without getting too much sodium hydroxide in the mix to quickly and you have a jar of watergalls - easy...But there is other uses too, like you could see in my Ible about making your own ferrite.In some areas it is still used as a flame retardant or to fireproof materials that otherwise would combust too quickly.Wood that was vacuum treated with waterglass and fully dried turns into a rock like substance that looks beautiful once polished.And it has a really hard time burning...As it cures like glass with just little heat it was used in Fukushima by injecting it into the soil to form a barrier for the radioactive water.The heat from the radiactive water helped curing the mix...You can even use it to repair your cracked potter and glassware..Holes or leaks in your exhaust system? What a pain if you are too short on money to replace the parts.So a lot of us pay quite a bit of money for repair putties and bandages to seal the lak at least for long enough to consider a real fix.Did you know that all these putties and such are nothing but waterglass, glass fibres and filler material?The later often just very fine sand.Easy to make you own in bucket loads for less than what the repair kit costs LOLA total pain in the behind is if your old car gets a water leak.Usually it is a seal on the pump, a hole in the radiator or a tiny crack.One to to fix it for a while is to add an egg white to your cold radiator water or coolant.Then go for a drive and the egg white will boil off and dry where it comes into contact with air - outside you problem.Works remarkably well and won't harm any part of your engine either.Only downside is that it usually only lasts for a few days, being a natural product and such.Some people though claim they got weeks or even months out of such a cheap fix.A btter and more permanent way to seal such tiny leaks is to use waterglass mixed into the cooling system.It will form a lasting glass like seal that has no issiues under high heat or pressure.It even fixes your leaking head gasket if the water goes not get into the oil jet.Oil getting into the water might still still be fixable with waterglass.Water in the oil means the waterglass could enter the oil and if that happens you end with glass in your moving engine bits.A sure way to kill every engine and used to properly destroy them for recyling purposes by law in some countries.Waterglass is added to the engine oil and then it runs until hot enough for the water to evaporate.At this point the engine and all bearings just permantly seize.Waterglass added to cement provides a good barrier for oil and other liquids, making a spill cleanup much easier as the spill can't really penetrate the concrete.My personal favourite though is to use it for the easy removal of unwanted paint gretings on walls and such.You know how some kids think that a spray can with paint and a clean wall make artwork...If said wall is "painted" with a a mix of waterglass and sugar the spray paint will stick as good as before.But then you come with a pressure washer and clean it off in a few minutes and without any traces left on the wall.Sadly you need to re-apply the protective coating before the kid with the spray can comes back next night...What are your uses for liquid glass?

Topic by Downunder35m  


Options to save on gas while TIG welding ?!?

It's been a while but last weekend I had to some quick TIG welding for a friend with no clue how to use a TIG welder at all.Still wonder why he felt the need to buy one LOLAnyway, the regulator was quite crappy and seemed to only provide next to no gas flow or literally a massive blow from the hand piece.Back home I started to wonder why there is no batter way to direct a smaller volume of gas to keep an inert atmosphere around the welding area.There is a relation between tip position, arc length and nozzle diameter.Obviously the more amp you need the more gas you might need.There are guidlines for the flow rate in regards to the amps used for a reason.And anyone who ever tried to use a TIG welder outside on a windy day knows only too well how costly or annyoing the job might end up to be.A fancy kitchen range hood I saw years ago popped back into my mind.It was a costly designer thing that used directed vortex streams to "suck" away whatever comes from your pots and pans on the oven.Worked surprisingly well and with low noise too.Shouldn't it be possible to make such a design work "in reverse"?A vortex style ceramic nozzle in the hand piece would allow for a much lower flow rate while still providing a strong and concentrated flow of gas right on the welding area.IMHO it should also allow for a much more stable plasma/arc.According to my guestimations a reducion in flow rate of 40-60 should be well in reach - a considerable cost factor...Too bad I can't used my 3D printer for ceramic :(

Topic by Downunder35m  


Making a proper fire brick or refractory liner

If you are cheap like me then paying an arm and a leg for commercial grade refractory mixes or ready made bricks is no option.And how wants to make their design only to find there is no matching bricks for it...There is lots of totorials online and here on Instructables that deal with making heat resistent bricks and similar.And this is all well and good for normal melting applications or your pizza oven, not so much if you really need intense heat.I found that commercail mixes tend to be either really brittle once heated up or that they will glace up and even melt.So why not make my own mix...Ingredients:Fine sandCrushed PerliteVermiculiteSodium SilicateThe first three you find in basically every home depot or garden center.The last can be made from crystal cat litter and sodium hydroxide.Use proper PPE please!For a refractory mix I use:100ml of clean water.60g of crystal cat litter.About 35-40g of Sodium Hydroxide.This will provide a very silica rich solution.Use a high jar or similar and fill the water in.If you have use a magnetic stirrer, otherwise be prepared for manual labour.Add some cat litter but not so much that stirring becomes a problem.It will fizz around a bit and when it stops slowly add some sodium hydroxide.The mix will heat up and the cat litter starts to dissolve, once it is gone add some more.If it becomes hard to dissolve them add a bit more sodium hydroide but avoid letting it get too hot and so it boils!!A bit of steam is fine though.Towards the end you should have a quite hot mix with all cat litter inside and a bit of sodium hydroxide left.See what dissolves and only add as much as you really need.40g is enough, if it won't dissolve the cat litter then keep stirring every now and then and add some external heat, like placing it in a water bath on your stove.Once all is dissolved the mix is ready and should keep the jar closed to prevent it turning it a rock hard cement...Make sure your dry ingredients are well mixed and relatively fine in particle size.DO A TEST WITH JUST WATER!Take a defined amount of your mix, like 100g and see how LITTLE water in ml is required to turn in into a plyable mass like green sand.Note down this relation to get the right mix with the waterglass.To keep the mix workable you want to add the same amount of clean water to the amount of waterglass you calculated.If it is quite cold day you can leave it undiluted but give it a test on how long it takes to set on the surface to get your working time.Make sure you really mix it all properly to enuse the waterglass wets the surface of all aggregates in the mix.Press into your prefered form, remove form and let air dry, preferably on some wooden sticks so they won't accidentally fuse with the surface you have put them on.Once you have enough to fill your kitchen oven put them in at a heat of about 80-90°C for 3 to 4 hours.Open the door every now and then to let the moisture escape.After that they can be fired up to become fully fire resistent.Do this slowly as there might still moisture be trapped inside that needs to steam off, not boil off as it might crack the bricks.Once they got a good glacing from being used they might fuse together but should not constantly crack and melt like some commercial products - plus it come dirt cheap in comparison.

Topic by Downunder35m  


Two MQTT brokers and displaying on LoveLace UI

Hi All ,I have two MQTT brokers on my network, one for Home Assistant and one to manage my solar system. Can you give some advise on how to display some of the solar info from that MQTT on the LoveLace panel on my Home Assistant?

Topic by DurranE  


How do i make a 12v battery indicator with flashing leds when recharging

Hi guys.I have a 12v lead-acid battery and i want to make a circuit, which can show me state of charge of the battery with 5 (blue or white) leds. When the battery is in use, it should light up all 5 leds at 100%, 4 at 80%, 3 at 60%, 2 at 40% and 1 at 20%.Now when the battery is flat and i want to charge it, i would like the leds to light up in order, as it gets recharged. Lets say it has 0% capacity left and i plug in the charger, the first led should start flashing/blinking. When the battery has charged to over 20%, the first led should turn solid and the second led should start flashing, indicating that the battery has now recharged somewhere in between 20-40%. This goes on until it has reached 100% and all leds should light up solid (no more flashing leds).Furthermore i would like to add a switch, which can turn on/off the indicators, as they take unneccesary power from the battery. This switch should only be able to activate the leds when the battery is outputting power, as i want the battery to behave like i described when it is being recharged.I have an example video of it, which is from the battery box of the Soundboks (go to 0:50 to see effect):https://www.youtube.com/watch?v=rlY8B2dHYD4&t;=50sIs this something anyone can help me with?Thank you in advance

Question by SimonR223  


Rate My Drawing!

A portrait of my friend Suliena Please tell me what you think :) I know the hair isn't exactly like in the real photo but I really wanted it to flow more

Topic by FoxyPenguin94    |  last reply


Looking for wood projects (garden, planter, home, etc)

Looking for basic wood projects using, 1" x ?, landscape timbers, pallet wood, etc than I can make and resell.

Topic by JerryM160    |  last reply