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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


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


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


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


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


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


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


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


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


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


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


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  


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


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


Editing & Re-Publishing Instructables

I've been getting a lot of subscription emails lately and they are for the same Instructables. (NO, not a bug).  I'm making the assumption that members are editing their Instructables and instead of just saving it, they are going through the publishing step again.... which sends yet another email about the same ible. While I understand the need for re-publishing (say you made a significant update after a few months) so I'm not suggesting that the publishing step be removed after ibles are already published, BUT there must be a better way. Perhaps there should be a NOTE on the publishing step saying "You're Instructable has already been published. It's unnecessary to re-publish". OR disable re-publishing within 24 hours of the last time the step was completed? Its almost getting to the point that I want to turn off notifications completely for Instructables, because I don't want an email about the same ible 6 times in one day... Thoughts anyone? UPDATE: How to Edit an Instructable without Re-Publishing: 1. Open your Instructable, make your changes and click the "Save" button. 2. Then hover your mouse over "More" (to the right of the "edit", "publish" & "share" tabs) and click on "Full Preview".   3. If you need to go back, click "edit" from the "Author Options". As long as you've clicked on the "Save" button there is NO NEED to Re-Publish for edits to take effect. Re-Publishing is unnecessary and just resends everyone who subscribes to you another subscription email.

Topic by canucksgirl    |  last reply


How to install Windows XP IN PLACE OF Android on a phone

I have a Moto E first gen smartphone and a copy of Windows XP lying around, and I was wondering if it would be possible to install XP in place of Android on it. I don't want to run XP on top of Android, I want to erase Android and make XP the only OS on the device. Is this possible? And yes, I know it wouldn't really be useful for anything, it's just for fun.

Topic by JedR5    |  last reply


Removing duct tape residue

Does anybody know of an effective way to remove the residue left from gaffa tape that wont melt plastics or harm electrics? I recently got an old keyboard that covered with it. (there is a lot of the stuff)

Topic by Tomkatt    |  last reply


Any ideas about how to refill vintage selzer bottles (aka soda siphons)?

I’m wondering if anyone has any insight into the hardware adapter and technique required to refill antique glass selzer bottles. I understand that they were refilled through the nozzle in upside-down orientation with a special connector on the vintage refill machines, but there’s very little available info out there I figured that with the easy and cheap availability of CO2 kegging systems for home brewing that a bulk filling mechanism might be set up to get around the expense of proprietary systems like SodaStream, or without the waste of dealing with small and pricey 1 liter co2 chargers. Would also be great to put those old heavy glass bottles back to regular daily use.Thanks!Joe

Question by joepmurray    |  last reply


Can I hold Rechargeable NiMH batteries together with magnets as a power source for some USB chargers and a Raspberry Pi

I just want to make sure that they work and won't explode, would the Raspberry pi also be damaged?

Question by Missile502    |  last reply


Paint thinning question

Hi,I have some military grade paint that contains xylene.With all dangers of explosions and fire risks aside, will petrol/gasoline be able to act as thinners.I have a feeling that I did this years ago but cannot be certain (and all google searches seem to be about adding xylem to gasoline).I am not after a perfect finish; I will be using a roller to Mad Max my car but even so I don't want to create a chemical reaction that will ruin or curdle the paint.I am too mean to buy the correct thinners; this is a £20 project and the budget is up.Thanks

Topic by FriendOfHumanity    |  last reply


Relativity and why E can't really equal m²

See this topic as something that should be in our now deeply missed random fun section.Everyone learned in school that there was Albert Einstein and we have to thank him for bringing humanity into the next evolution.At least in terms of understanding the universe, quantum physics and things like this.Over the years I developed my own funny theories on why Einstein was so stunned that his calculated energy output from the first nuclear test was off by a factor of about 4 - meaning his calulations were at least 4 times lower than the real thing....The official story about this "mistake" is something like this in a destilled and drastically simplified way:"We did our best but this totally new terrain, theory got corrected by real world test.We now know how to factor all this in correctly for selfsustaining nuclear reactions with a critical mass."The real explanation with all calculations and so on was document of about 200 pages....The inoffical story about the first test and the corrected results was a bit longer and personal.Nicola and ALbert had a long hate-love relationship.Similar interests and theories got them together, diference in the opinion what can be put into our current math system for calculations and conflic of used terms got them apart.But like every good couple they always got over their differences and corresponded again - sometimes with a year or two before they were ready to talk to each other again.In this story Nicola had massive arguments with Albert about the required, sustained and released energy levels for Gadget - the first test of the Trinity series.To give you an idea why it was so hard for both to understand the other or to accept the other's calculations:Einstein based all his theories and what we use today when it comes to math.Tesla however prefered his own mathematical system, one he promoted and got into every day use in many US schools at the time.In simple world it was based on a big circle, I like to call it the circle of math.Almost all of our natural constants (that were known back then) were present as lines, multiplication, squre roots and more were as easy as following the right lines and pathways indicated on this circle.Both system, ours and Tesla's provided the exact same results, the later however without any need for additional "notes" along the way or complicated formulas.And even worse when it came to energy.Back then science alrealy knew there is more than what our laws of physics state and what we know.And what we could not really understand and only proove in theory is now as common as butter on your bread.Thinks like quantum mechanics, quarks or the fact that you can't observe a light particle on a quantum level directly, only as its sum....Tesla however already had "a higher understanding" on how different energies interact and how get from one form of energy to another.Like his tesla transformer, the radio transmitter and so on.While we had no clue at all Tesla already studied the ionosphere, he had different name for it though.For him it was obvious that it is not just a reflective barrier for radio waves but that it also has a very energy potential on its own.Either way the argument was the Albert only factored in the mass of the nuclear material, the explosive forces from the ignition and the corresponding implosion.Basically everything we could see, explain or theorise about back in the day - and it needed to be possible to claculate it somehow to match expections.Nicola made the claim that during the explosion also a lot of electromagnetic energy is created together with what he called a break in the fabric of the universe.Not only that but the electromagnetic shock (we call it now EMP) is not really a single thing but spread basically over the entire know frequency range, including visible light.The visible light claim was confirmed during the test by shadows burnt into walls....You can clearly imagine how good old Einstein must have felt seeing his good friend being dead serious about things he could not have the slightest idea about.After all there never was any test before and certainly none with Tesla present...How the personal story between the two continued can be found online if you some digging or if you prefer in a well stocked library - yes they still exist as real place ;)What was mostly left undocumented, at least for public eyes was the implications from the Trinity test series.That Tesla really was onto something even if the smartest man on the planet could not understand a single word of it became painfully obvious.At least for Albert....In his later theories you can find the influence the revelation of finally understanding why his calulations were of and most importantly understanding what Tesla meant by the fabric of the universe.E does not really equal mc² for quite a few reasons.Firstly because it is based on the assumption that nothing can be faster than the speed of light.So did our best to measure it, cheated by making definition of light speed and meter based on the same thing.I mean: If you take two "unknown" variables to create a result and then use the result to finetune the input- how accurate can it really be?....Today we long know that there things travelling much faster than the speed of light, for example gravimetric shockwaves when a distant star goes booom.We detect these "gravity quake" now so we can aim our big telescopes to where it happened and see it in "realtime" once the light arrived long after the shockwave.And if you dare to re-do the original calculations for Gadget and factor in that a gravimetric shockwave travels about 4 times fast than light you get an idea why Tesla already knew all about it.What came out of all the offcial calculations and theories is well known.What is missing from E=mc² was never officially published by Einstein...Applications for the possible damage to what Tesla called the fabric of the universe.We are trained to only use our brains in two dimensions.A bit of it comes from our evolution as since the dawn of time we prefered creating a flat image over creating a sculpture with similar details.Some people though can use their brin in three dimensions with ease, like when a really good sculpture artist say "The sculture is already in the rock, I only need to remove what is covering it."And sure enough every color or texture detail of the rock ends up in exactly the right spot to make the result perfect.Musicians are quite similar, a lot of them have no clue about notes or how read them to create a nice tune on an instrument.Some only need to hear a song once and can repeat it on all instruments they play like they studied the song for years.Others hear the vocals only and create tunes and melodies from it that not only match voice act but also reflect on the mood, the feelings.In some really good songs you only need to hear the instruments and can almost imagine what the singer would sing to it...A very few can do similar with math, we like to call them a genius because we can not imagine a complex and long number as a series of meaningful images or emotions paired with colors - for example, as there many more ways to deal with numbers...People like Einstein realised after the Trinity tests that the EMP and corresponding electromagnetic effects are too strong to be measured by anything unless it is from a great distance.That means, like lumen per area, the strenght of the electromagnetic effects increase exponentially the closer you get to the source.Still... No big deal right?Well if you dare you make a frog levitate in a magnetic field, won't be a healthy experience for the frog but it will levitate.You can look these frog experiment and corresponding scientific explanations up online if you are bored enough one day.The point is: If a frog can be excluded from gravity in a magnetic field of suffient strenght, orientation and other features, then what else can "float"? ....Or more to the point: Why exactly does the frog float if he is not magnetic enough to begin with?....We have no problems visualising or imagining the shockwave from a big explosion like Gadget.High speed films show us that there would be an expanding perfect sphere, only object like the ground limit this experience, but you see it nice in underwater explosions!What most people can't even begin to understand is how a shockwave of which the EMP is only a small part acts, travels or what effects it migh thave.Unlike a normal shockwave we have something like redox reaction happening.The explosion creates an unimaginably strong electric impulse, a bit like all lightning strikes in world feeding into a single lightbulb at the same point in time.For argument sake lets say is almost indefinately high.However, like in an ignition coil this impulse creates and equally strong electromagnetic impulse.And since the entire reaction at this point is far from over we get a harmonic resonance and feedback system.Imagine a second you stretch around the globe as a band and then you cut a mm off it - that would be about the timeframe for the most intense electromagnetic field swinging around at all sorts of frequencies.And during this very short period of time a bubble is created that expands what modern sciensts now call the space - time - continium.Same name as in the movies but this time based on quantum theories and such things to explain gravity.An awful lot of energy is trapped inside this bubble and once the initial reaction is over the electromagnetic impuls disappears and only the normal reaction from the explosion continues.The bubble however does not pop or disappear, it implodes.All this energy is compressed basically to a single atom size and released.Sadly this energy has no visible effect, nothing we can observer with our eyes or instruments...Again we use quantum theories to explain what must happen to find way to it "visible" somehow or to find way to really measure it.Gravity sensors are a result of these theories and developments and now part of basically any good GPS satellite or space probe.Some fancy phones have them too.What would actually happen if we would have found a way to affect the space time continuum in a very controlled way?Without explosions or such bad things, just by using simple technologies.Now I would have to explain things in at least four dimensions, which means most readers would shut off now.Using five would be insane, I know :(So let try to ignore how things work fr real and do what every good scientist does: simplify to make the imagination work in just 2 or 2.5 dimensions.Put a cork on a pond a throw a rock in it.It moves, mostly wobbling on the waves but it moves away from where the rock was dropped.If it could be "anchored" at the right spot between two crests of the wave it would move with it, like a surfer on a good wave does.A craft that creates our field from the inside and in a neutral configuration would create a perfect sphere.What would that mean for the craft and those outside observers?At a first glance nothing until you realise the craft has no mass at all.You could lift a 5 ton vehicle with your little finger and flick away like something you found in your nose.Unlike our suspended frog the craft would create a field bubble where gravity diverts around it.Gravitity is the driving force of the space time continuum.Without it there would be no time, without time there would be nothing.If you would be inside the craft and be flicked away by a finger you would only realise it if you looked out of window or onto a screen showing the outside.As the craft does not exist in the normal space time continuum, so to say, the same non existing effects of things like acceleration, g-forces and such can't apply for what is inside either.Well, at least until you reach the wall, the suddenly all is stopped and has to enter our normal continuum again.You would be mince meat on some wall inside what is left from your craft...Increase the field strenght to overcome inertia of smaller particles and even air molecules or dust particles are diverted around the field.Nothing though that would rival the mass of the craft in a significant way, like flying into a solid wall or mountain....A modfied field geometry allows to affect the shape of the bubble.To keep it in two dimensions, imagine a ping pong ball as the field that you press into some slime, or similar fun stuff.Start moving it and it forms something like a wave in the front and something like a wake on the other side.Our field can shape the bubble so that our space time continuum would look quite similar - if we could see it instead of theorising about it.As result the craft now moves in our normal continuum without having and appearent form of engine.The bigger you make these "waves" with your field, the fast you go....And suddenly those impossible movements in the sky that are always dismissed as a hoax or weather balloon make a lot more sense.Be it a Scalar drive, the Fluxliner, VR7 and derivates, they all use garvity as a propulsion system.Fair enough you might say, but what does mean in terms of where we might have been already since almost one hundred years....A gravity based drive system in the sience fiction section has many names.Warp Drives of course comes to mind first.But also FTL drive or Jump Drive.Just because gravity waves are much faster than light already means lightspeed is not really a limit and hasn't been for a very long time.Why do you think superconductors were first developed by/for the military? ;)With no mass it is only a matter of the avilable energy how fast you can accelerate and what top speed you can reach....Or to be precise: How effiently you can create an insanely strong electromagnetic field.Make you wonder what else came from understanding what things like a Hedron Collider can do...With an estimated energy output equal to truck sized generator you could make it from Virginia to Mare Tranquillitatis in about 10 minutes.Make it 30 if you want to get out and stretch your legs when you are there.Some now say "I don't care who or why someone goes to the moon."But what about those who think climate change is real and how we produce and use energy plays a big role in it?Let alone those actually considering that fossil fuels might run out one day....If you have a gravity drive then you have a very neat way to create almost limitless, clean energy.....I leave it up to what it would mean if everyone and everything in our world would have access to free and virtually unlimited energy....Isn't it good that all this is just a nice story and that all is just fiction with no relation to reality?But if E does not equal mc² then how relative is our reality really?

Topic by Downunder35m    |  last reply


Make your own liquid nitrogen for under $500

Ben Krasnow built a machine that makes liquid nitrogen for under $500. It's made with many parts he bought off of eBay and can generate a liter a day of the stuff at a cost of $1.15 per liter. Check out the link for more info. The first video is from this year's Maker Faire and the second shows the effect of liquid oxygen on a BBQ. DIY liquid nitrogen generator via adafruit

Topic by fungus amungus    |  last reply


It won't let me publish

So whenever I try to publish my project on my iPhone, it comes up with a bar that says, "Please select a Grade and Subject." What does it mean and what do I have to do? I've tried on the computer as well but whenever I click draft instructables, it takes me back to the home page. Please help!

Question by Hyperballoon11    |  last reply


Help on a phone automatic charger project

Hello everyone,Im trying to build a circuit that allows a phone to be charged by a PowerBank automatically and I obviously need your help since Im kinda new to all this.So the idea is to connect a phone to a powerbank using a relay. This relay is controlled by a PIC16F877A.The Powerbank turns on once it is connected and off when disconnected. Im planning on using an android application to turn on the flash light once the phone is on 15% so that the LDR detects it and the PIC command the relay to switch. So once the powerbank gets connected it should turn on and start charging the phone. what do you think ? can i use a MOSFET instead of a relay ?my problem is on the determination of the exact components I need so that the phone gets charged correctly.Basically, the powerbank voltage is 5V and the phone draw a current of about 1.4A.What is the best relay and transistor to use ? or should I simply use a MOSFETHere I used a 5V relay but I need to determine the coil current to determines BJT collector current --> this determines useful BJT base current --> this determines useful base resistor values.I hope you guys can help me pick the right components to use and advise me of how I can make this work perfectly.PS : the simulation is working just fine

Question by AbdChahidS    |  last reply


PE backed Heat Reflector

I started using energy saving aluminium heat reflector s being house radiators.We used a Fixman double sided tape tape as this keeps on peeling off from the PE backing.DSA is stuck to the wall and it remains tackey!Can someone recommend a suitable adhesive to keep the reflectors on the wall.

Question by RastyG    |  last reply


Coto 9202(150hom) 5v reed switch

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Question by MikeC510    |  last reply


Automated Badminton Shuttlecock Launching Machine

There was 1 machine in my mind I like to challenge myself which is an automated badminton shuttlecock launching machine. Over the internet, there got some simple manual loading machine. But the one I like to challenge is similar to below link:https://www.youtube.com/watch?v=Gwg-Ge4gu9gAutomated with dozen of shuttlecock ready to launch to several position.Anyone able to assist?

Topic by AlexL361  


Indoor framing: Taken to another level.

We all love to mount stuff to walls to get it off the floor. Makes things so much easier to clean when the floor has nothing on it. But we also don't want to put holes in or deface the wall. Especially if we're renting. So then we get floor mounted stuff and the floor is a headache to clean. It often takes way more time to move the stuff off the floor than it takes to clean the floor! Imagine if instead a frame was devised to line the walls. Something like 4x4's for the corners or make the entire thing out of something like 2"x2" slotted steel angle. Its extremely strong holding a lot of weight for spans of over 8' without flex. If course its not completely off the floor but pretty close. Once you have the corners and horizontals in place you can hang/bolt anything to it. It takes space organization to an all new level. Look around your room that you want to organize and try to envision being able to mount anything anywhere in that room and have it off the floor if so desired. And have it stable. One thing I haven't figured out is how to anchor a vertical post to the floor without drilling into the floor. One option would be a high friction material like artificial rubber, maybe 1/16th or 1/8th thick that goes between a plate on the bottom of the vertical and the floor. If it was loaded with a lot of weight surely it wouldn't move. Another advantage to this is in the event of an earthquake it would add structural integrity to the room for those of you on the west coast waiting for "the big one". Or it might act as a roll cage for your house as a hurricane blows it off its foundation!I put this under Workshop but I have no idea if that was the best one.

Topic by SpencerW  


Can i enter the contests?

I live in Turkey, and it is stated in the official contest rules that i can't join the contests because of the us trade embargo. What i don't understand is does this mean i can't even submit my instructable or i can enter the contest but can't win any prizes? Because i have read on another page that i could join but i couldn't get my prize delivered to Turkey.Thanks.

Question by matrikasatr