Car Heater/ Warmer

Hello I am Melwin from India I want to create a Car Can/ bottle Warmer/ Heater. My Basic Aim is to make hot water for preparing baby formula my baby when I travel with family in my car. This way I can avoid multiple stops for getting hot water. The commercial versions are available in the Market for a minimum of 3000 Rupees. It is very rare to buy in India My plan is to buy a 220 v 1000Watt Heating Element and cut it to suit to 12v When i measured one test setup with such a coil I get around 1.5 Amps per coil. I didnt have a thermometer to test how hot it gets. Since the car Cigarette Lighter supports 10A. I can easily Add 4-6 Coils of the same length in parallel. Also I can add switch to get different temperatures by adding up coil for each switch. 1-2 Coils = Warm. 3-6 coils = Heat. I dont want it to be a huge cooker. It should be able to heat up a glass (200 ml ) of water till 50- 60 degrees C) A higher version can have a Thermostat to cut off things as a safety feature. If this setup succeeds in boiling up water then I can also have my favourite cup nooodles when on long trips with friends I plan to make a small ceramic frame to mount the heating elemmet. On top I will place a Copper plate. Leaving some gap between the Plate and coil. This entire setup will sit in a Tin can of suitable diameter. I need to think about how i get the ceramic frame to Sit inside the can without touching the Metal. To this Metal can i will attach a handle so that it can be handled when hot. My next question. Where do I place it in my car safely. Suggestions/ Concerns/ Comments please Melwin

Topic by melwinmyworld 7 years ago  |  last reply 7 years ago


Stay Warmer At Night

We keep a kind of chilly house in winter . Sweaters and sweatshirts are expected, except for company.  In our area, we heat and cook with natural gas and that is cheaper than electricity. But the cheapest heat is residual from cooking . So a kettle is always on for tea whenever wished. And most nights we bake potatoes unless the daughter bakes brownies or something. And, in addition to that we will stick bricks in the oven. Come bedtime, the bricks get wrapped up in towels and put in the bed. where toes can cling to the brick and other toes. Best strategy for bricks is to bake them at 175 for a couple of hours.  Please spare the obvious comments, but please make other homey suggestions.

Topic by Wilmette 6 years ago  |  last reply 6 years ago


Anyone made a towel warmer?

 We'd really like one, but they are quite expensive. We're wanting one that plugs in so we can use it at home or in the RV. It seems regulating the temp is the main issue and there can't be much more than some kind of thermostat and wires run through a pipe.?

Question by dulciquilt 8 years ago  |  last reply 2 years ago


Automatic Coffee Cup Warmer

I was given a coffee cup warmer many years ago. What made it so great was that it only turns on when there is a cup sitting on the plate; remove the cup and the warmer turns off. The other great feature about it, is that it has a higher temperature than any I have purchased since. There is no name thereon so cannot check to see if they exist anymore - no luck with Google so far.   What I would like to do is either be able to safely adjust a current model so it is somewhat hotter or, preferably, also make it automatic. Making it hotter is the first priority. jackew@earthlink.net

Topic by jackew 9 years ago  |  last reply 1 year ago


What is this?

I was cleaning my closet and I found this. a used hand warmer. Being curious, I opened this sucker up and found black powder with what looks like a small bit of silver powder. My guess is its iron, magnesium, and salt.

Question by BADWOLF1 8 years ago  |  last reply 8 years ago


how can i make a reusable compact hand warmer?

I need it to last for a while and hen be able to heat it up. It also has to be thin and compact

Question by laxmaster92 10 years ago  |  last reply 9 years ago


Cup warmer plate/tray to install in cupboard

My house is rather cold in the winter, and when I make coffee in the morning I have to manually heat my espresso cups by filling them with warm water. A lot of automatic espresso machines have cup warmer trays. I don't want to buy a new coffee machine. I am thinking it would be possible to place some kind of warming mat under my cups in the cupboard, somewhat similar to heated mattresses / heating blankets. I haven't found any existing products that fit the description. Any input on this? :)

Topic by jaknudsen 3 years ago  |  last reply 3 years ago


Battery powered water - warmer / Thermostat possible?

Hello. I am looking to design an enema kit that has a simple built in battery powered thermostat.  I work with many patients with chronic pain & opioid induced constipation.   They use warm water enemas often to clear their bowels.  The number one complaint i here is "its too annoying to get the temperature right ' So i was thinking, how could i design a simple design.    It would have to be able to heat 1L of water up to 37-43 Celcius and be battery powered.   So a patient would fill up the 1L enema bag with water, hangit up an turn the heater on with their selected temperature.   THen an alarm will go off and they can administer it with the temperature stable.  So i guess what im asking is it possible to get a battery powered thermostat for this purpose?   If it needs a plug it won't be convenient enough. Thanks heaps! 

Topic by MichaelD361 3 years ago  |  last reply 3 years ago


How do I calculate the resistance needed to make a "heater"? Answered

I plan on making a heater out of resistors, I have no clue on how to calculate this, I can supply it with 12VDC up to 5 amps. I don't plan on making this on a large scale The future purpose of this fingertip and toe warmer. Any, if all help is appreciated! :)

Question by junits15 10 years ago  |  last reply 10 years ago



I deleted some instructables, but they are still showing up in the non-english sites.

Hi, I deleted several instructables because of safety concerns  and you can see that they are indeed gone    https://www.instructables.com/id/FOOT-WARMER/    https://www.instructables.com/id/FOOT-WARMER-1/    https://www.instructables.com/id/DEEP-WARMTH-FOOT-WARMER/    https://www.instructables.com/id/Cozy-Hand-Warmers-and-Foot-Warmers-from-8oz-Plasti/ but they are still showing up in goolge search as being on non-us instructables sites where the can be found here for several language versions (there may be more links also)    https://www.instructables.com/id/FOOT-WARMER/all/?lang=de    https://www.instructables.com/id/FOOT-WARMER-1/all/?lang=de    https://www.instructables.com/id/FOOT-WARMER-1/all/?lang=zh    https://www.instructables.com/id/DEEP-WARMTH-FOOT-WARMER/all/?lang=de    https://www.instructables.com/id/Cozy-Hand-Warmers-and-Foot-Warmers-from-8oz-Plasti/all/?lang=de      I can't log into the non-english sites. How can I get the 4 deleted instructables at the top of this message restored so I can modify them and/or delete them on all instructables servers (english, german, portuguese, spanish, chinese, japanese)? Thank you moi

Topic by MemberOFinstructables 5 years ago  |  last reply 5 years ago


Is it possible to make a pocket warmer from part of a hair dryer? Answered

I have an old hair dryer and I know that there is something inside it which heats up the air. I was wondering, is it possible to remove that and attack a battery pack and case and have a pocket warmer or would it not work? Thank you.

Question by KillerHoggle 7 years ago  |  last reply 7 years ago


Kombucha or sprout heater from a potpourri pot or other appliance?

I need something to heat a bucket of kombucha tea to 70 degrees Fahrenheit when the heat is off in the kitchen where I will be keeping it. The temperature dips below 50 degrees Fahrenheit in there. I also need something to warm sprouting jars, which I'll be keeping on a shelf that I plan to enclose with a window blind or something else to keep the heat in, but allow ventilation. I don't think I need a thermostat for either of these. The temperature doesn't have to be exact. For the kombucha, I could buy a heating pad for $60 or a heat belt for $20 and pay to have them shipped or I could go to the local aquarium store and buy some fish tank heaters, but I'd prefer to spend less, make something myself out of something old and not support an aquarium store. I'm not a big fan of fish prisons. The thrift stores around here have lots of old appliances for $2-$5 each. I thought I could make heaters using the heating element of one of the small potpourri pots I've seen at Goodwill. I saw online that these pots are heated with a wire wrapped around the (irremovable) pot. Any thoughts on how I could make heaters with this heating element that are safe and not too hot? Any ideas using other appliances? Another option would be to find a cheap heating pad (for heating people) without auto shutoff and use that on the Kombucha at least. I'm not sure that that would be warm enough though, but maybe it's a more worthwhile option that trying to make a heater. What do you think? Should I forget making something for the Kombucha and look for a heating pad instead? Thanks for your help.

Topic by vegagitator 10 years ago  |  last reply 10 years ago


Deleted instructables still show up on non-English instructables sites

Hi, I deleted several instructables because of safety concerns and you can see that they are indeed gone    https://www.instructables.com/id/FOOT-WARMER/    https://www.instructables.com/id/FOOT-WARMER-1/    https://www.instructables.com/id/DEEP-WARMTH-FOOT-WARMER/    https://www.instructables.com/id/Cozy-Hand-Warmers-and-Foot-Warmers-from-8oz-Plasti/ but they are still showing up in goolge search as being on non-us instructables sites where the can be found here for several language versions (there may be more links also)    https://www.instructables.com/id/FOOT-WARMER/all/?lang=de    https://www.instructables.com/id/FOOT-WARMER-1/all/?lang=de    https://www.instructables.com/id/FOOT-WARMER-1/all/?lang=zh    https://www.instructables.com/id/DEEP-WARMTH-FOOT-WARMER/all/?lang=de    https://www.instructables.com/id/Cozy-Hand-Warmers-and-Foot-Warmers-from-8oz-Plasti/all/?lang=de     I can't log into the non-english instructables.com sites. How can I get the 4 deleted instructables at the top of this message restored so I can modify them and/or delete them on all instructables servers (english, german, portuguese, spanish, chinese, japanese)? Thank you moi

Topic by MemberOFinstructables 5 years ago


What is this thing that looks like a shoe warmer?

Porcelan covered cast iron.  About 8 inches long.    Kind of heavy for its size.  The holes on the back don't appear to befor wall hanging.  The one on the "handle" is shallow and will not hold a nail for hanging.

Question by gloria.victor.33 4 years ago  |  last reply 4 years ago


Windshield Wiper Warmers like the rear window defrosters?

A few years ago, someone asked about windshield wiper warmers.  No real responses.  I'm asking again.  The issue is that in the northern states, the wipers get iced up, and it happens even while you're driving.  We know how to do this for the back window, which won't save anyone's life if the front one is iced over.  We know how to use a hot wire to cut foam. So we know how to heat wire. Some of the newer cars hide the wipers below the glass, so defrosters don't help much.  And washer fluid doesn't work nearly as well as you might think.  Hot liquids freeze faster than cold liquids, but the goal here is to warm up the wiper blades.  How would we go about making a warm wire setup that can be connected to the battery for slow warming and lay under the wiper blade area?  Any guesses?  It's getting cold here in Michigan!  You'd think one of the automotive companies would figure this out, but they clearly think we all have garages and live in warm states.  I'd like to see some responses that wouldn't be too difficult for a novice - I don't care about technical terms, I just want to know how to wire it up so it works.

Question by whisperonthewind 7 years ago  |  last reply 7 years ago


Need help making a CAPD/Dialysis bag warmer

We are doing a lot of traveling right now to a bunch of different hospitals and I need a heating device I can plug into the car or preferably run off a battery. I have a hard platt suitcase which will hold 2 bags and am toying with the idea of just insulating it and putting a heating pad in there to plug into an inverter. The problem there is I don't always have access to an outlet in the hospital, and you tend to look very much like a terrorist and scare the holy jeebus out of people strolling around the hospital with this wired suitcase thingy. I am unaware of  IED or ordinance requiring an electrical outlet, but hospital security knows all about them and are just itching to go all *observe and report* on you.  I picked up one of those black and decker heat/cooler's at a yard sale with the intent to pop it open and see if anything can be repurposed, but I am not real confident on how to cover the elements so they don't melt the bags.  Temperature regulation is really important, and I really don't have the foggiest idea how to best do this. It's a 4.4lb bag of fluid, so it would have to heat 2 of them without turning them into boiling lava. It also can't be so weak that it takes 12 hours to heat the bag. It would need to get to 37*C/98.6*F (or near to it in any event) in about 4 hours. This is the real McCoy I am trying to rinky dink replicate: http://www.kidneystuff.com/warmers.html Keeping her alive ain't cheap so I simply don't have the 400$ to hand over for it.  Nutshell: I need help with (everything :P ) 1. Heating element 2. How to best secure bags  3. Best/most efficient way to power it 4. What material and in what fashion to insulate the case. 5. How to regulate temperature. I'm sure I missed some things, but really any and all advice would be more than greatly appreciated. 

Question by orphicdragon 8 years ago  |  last reply 5 years ago


how do i fix a broken refrigerator? Answered

Yesterday evening I heard something that sounded like an electrical short. Then I started smelling that smell that happens when something shorts out (burning electrical odor). Now my refrigerator/freezer is getting warmer and warmer. You can hear it trying to "cycle on", but then nothing happens. Someone told me it was probably just a switch. Any suggestions on trouble-shooting this problem?

Question by gotchers 10 years ago  |  last reply 10 years ago


Does anybody know how to make a USB Drink Chiller ?

USB Drink Chiller & Warmer plugs into the USB port of any laptop or desktop Windows computer. Can be set to Warm or Chill a drink.

Question by Harkle 10 years ago  |  last reply 10 years ago


Is there a problem if my copper coils for an electromagnet are heating up? Answered

 I have built a few little nail style electromagnets and they all heat up.  If there is less power its slower but it still does.  I have experimented by using this heat but on smaller coils it will start to smoke because it is to hot.  This made me wonder if this is a short or actually an apply-able heat source.  On a very large coil heat is generated but not enough to make smoke so is guess that it is actually losing power so it can't be a short. SO CAN I USE THIS METHOD TO MAKE A MUG WARMER OR IS SHORTING OUT THE BATTERY

Question by jj.inc 9 years ago  |  last reply 9 years ago


Nanotech makes white LEDs 5x brighter than before with warmer light.

New research with nanocrystals has created a new LED that gets 300 lumens per watt. Even better, the light is a warm white and not the cold blue-tinted white that we all know.The crystals absorb some of the LED's blue output and emit their own red and green light. That combines with the remaining blue light to produce a soft white glow.Existing commercial white LEDs are also based on blue LEDs. But they use a phosphor coating that converts some blue light into a broad spectrum of yellow light. When mixed with remaining blue light the result is a harsh blue-hued white. Link

Topic by fungus amungus 11 years ago


which is colder, frozen saltwater or ice covered in salt?

Ice with salt added to it AFTER it froze will be very cold, but how about frozen saltwater will it be colder, warmer or just the same?

Question by nutsandbolts_64 10 years ago  |  last reply 9 years ago


Can someone tell me if I'm crocheting correctly? Answered

So I'm trying to make some arm-warmers and I'm making my own pattern.  The pattern I have so far is: 43 ch 3 turning chain 42 dc 3 turning chain But when I'm doing it the pattern is curling on itself. I'm not sure what I'm doing wrong.  Also note that I'm really green to crocheting so I'm probably just doing something I'm not understanding. So if you don't know, then could you please give advice on the basics? or link to something similar? Thank you!

Question by Iridium7 5 years ago  |  last reply 5 years ago


Global Warming Leading to Possible Beer Shortage

According to Treehugger, a warmer climate is leading to shortages in hops and barley. If all of it keeps going in the same direction, beer will be getting more expensive to make and nobody wants that. Link

Topic by fungus amungus 11 years ago  |  last reply 11 years ago


What is the best color to paint my swimming pool so it will be warmer? I assumed dark blue, but would silver be better?

My pool is an inground fill & drain with no filter, pump, or pool cover. The edge of the pool is about 2 feet above ground.

Question by merryk 10 years ago  |  last reply 8 years ago


giant metal structure

It's getting warmer where I live (that's global warming for ya) and I wanted to start testing my free energy instructable again. Does anybody know or have any good ideas for a non grounded big metal object or way to make one?

Topic by guyfrom7up 11 years ago  |  last reply 11 years ago


What is the best color to paint my swimming pool so it will be warmer? I assumed dark blue, but would silver be better?

My pool is an inground fill & drain with no filter, pump, or pool cover. The edge of the pool is about 2 feet above ground.

Question by henster22 8 years ago  |  last reply 8 years ago


How can I collect and melt large amounts snow for drinking water? (solar, not fuel based)?

I live in the woods in central Massachusetts.  I collect rainwater during the warmer months, filtering it for drinking water.  I'm looking for a fairly convenient, low effort way to melt snow using the sun.

Question by hunrichs 8 years ago  |  last reply 8 years ago


Source for "filament white" 1800-2200K color temperature warm white led's?

After literally hours, I can not locate small quantities of warm white led's with what is sometimes described as "filament white" color temperature. Most warm white LED's are a much cooler 3000K. Any suggestions? Ideally a 3 or 5mm discrete LED. Images of warm white led's are unreliable. A color temperature description is necessary. Anyone? Thanks! I received a sample of these, but their color temperature is actually much closer to 3000K. http://www.ledtronics.com/Products/ProductsDetails.aspx?WP=1922 2017 UPDATE:  2200K (and warmer) LED's are finally becoming more commonplace in bulbs, LED tape, etc... so I'm keeping my eye out for more component and project LED's to also include this warmer range. 

Question by davidandora 5 years ago  |  last reply 5 years ago


Hacking a pipe heater thermostat

Hi I am wondering if anyone has an idea on how to change the thermostat on a "store bought" pipe warmer. The kind you would wrap around your outdoor pipes to keep them from freezing in the winter. They are set fairly low, around 70f I believe and I would like it to put out a constant 100f or so , to about 150f or so. Thanks, GA

Topic by Georgeaco 11 years ago  |  last reply 11 years ago


All-metal desktop fan - is it okay to use light oil on the motor spindle?

I have been given an all-metal desktop fan - the sort one uses to keep cool in the office during the warmer months. As there is a slight squeaking noise when it is on, is it okay to use light oil on the motor spindle at the point where the spindle enters the main body of the motor? Thanks for your time to read and reply.

Question by kevinhannan 7 years ago


Can I get an adapter that will let me plug a 12v car cooler/warmer into a regular wall plug? Where can I get one?

This is just one of those small 6L travel coolers. I need to know exactly what kind of adapter I need to get and where I can get one. Also, if you know about how much they run that would be great! Thanks!

Question by 10 years ago  |  last reply 10 years ago


Why are these doorknobs warm?

Hello world! I have a random issue that has been stumping my class since it began: the doorknob is warm. No other doorknob there is warm. There are a few other knobs in the room and they aren't warm, so I don't think it has to do with the heat difference. They aren't just a little warm, they are significantly warmer than other doorknobs. I'm in a room full of engineers and none of us have any idea why they're so warm!

Question by stale56 5 years ago  |  last reply 1 year ago


Im looking for a thermostat that has "child thermostats" tht can communicate with each other for a house without "zones"

I want to be able to control the temperature in multiple rooms without "zones" with a themrostat that has multiple child thermostats (being able to access them remotely via ethernet or wifi would be a plus) Say room A is 60 degrees F and room B is 65 F i want to be able to set it so Room A is atleast 65 and room b is no warmer than 69 F . Any ideas??

Question by viamptor 10 years ago  |  last reply 8 years ago


I'm Really Impressed...

As a result of the contest - there's undoubtedly been an explosion of knit-related content....I myself will buying some yarn and needles and Teaching Myself (thanks Rachel) to make myself this Awesome Neck Warmer as it can be a bit chilly while riding to and from school and such :) It seems much more suitable for use in Central *cough* Florida *cough* - I just hate being cold while riding and my longish 'necular' region is typically not protected very well...So that said - well done on all the new stuff :)andThoughts?, anyone else....

Topic by trebuchet03 11 years ago  |  last reply 11 years ago


Attic insulation-should I insulate floor to ceiling?

I am in Conn. and the person helping me has said the roof needs to breath. This is a 4th story on a 3 family house. It is A shaped. I plan on covering the insulation after to finish the space off for storage. I think this will keep the 3rd floor warmer. The floor is insulated, but I wanted to do the wall which makeup the pitch of the roof. I have never heard of the roof needing to breathe before. Is this true or can I go ahead and insulate everything?

Question by Stacey 131 7 years ago  |  last reply 7 years ago


Best places to put a smoke alarm in a shop?

This morning our Pie Warmer shorted and caught fire. We noticed a smell, then haze, then smoke. So we rung the fire brigade and they came and everything was sorted. Luckily it didn't happen during the night, but the two smoke alarms in the shop didn't go off. The batteries were working fine (still beeped when the test button was pushed), so where are some ideal spots? The roof is quite high, and there is a lot of stock on the walls.

Question by asasklfjklasfkljasklfjaklfsjkl 8 years ago  |  last reply 8 years ago


Horny Toad - Makers of Awesome and the First Official Intern Sponsor!

Michigan summers are quite hot, so I really thought that it would be warmer here in San Francisco. Sadly that wasn't true... So it was a very welcome surprise when Horny Toad sent us a care package of some of their sweet -and warm- gear. All instructables interns are pretty active dudes, so we were more than pleased to take their "active wear" for a test drive with some ladder golf, Kubbing and climbing. Thanks Horny Toad!

Topic by lamedust 10 years ago  |  last reply 10 years ago


Solar Air Con for animal shelter

I am thinking of moving to a warmer country ( SW France ) than England but I have a small pack of huskies that I would like to keep cool in the warmest weather. I was wondering if it is possible to use the solar energy available in abundance to provide an air cooling system for them. I realise that aircon normally requires a lot of electricity but I am only looking to keep a small space ( block built shelter of about maybe 7-800 cubic feet ) cool and hoped that this might be possible. Any ideas ?

Topic by ukpicker 8 years ago  |  last reply 8 years ago


Will painting a swimmimg pool a dark color promote algae to grow more than a light colored painted pool?

I am picking a new color for my inground swimming pool with filter no heater. Wanted to change to color from a basic light blue to a more modern darker color.  Was told dark colors allow algae to grow more than light colors.  Any truth to that statement?  Also because the pool is not heated which color would help keep the water warm?  I am guessing that a dark bottom pool would be warmer than a light bottom pool.

Question by cindybcin 7 years ago  |  last reply 7 years ago


alternative ways to cool house in new england humid summers

I live in new england where we get some pretty hot and humid days in the summer. I hate ac units so I am trying to find other ways to cool my 180 years old house. It's well insulated and has a full basement that is 5 feet under ground level so it's usually pretty cool. A the temperature rises, the first floor is usually warmer and the second floor gets plain hot Has any one tinkered with fans and ducts to move that cool air up from the basement to the upper floors. Thanks

Topic by missplumeau 10 years ago  |  last reply 10 years ago


General question about controlling car engine ??? Answered

Hi ... I would like to ask, how do call the "thing" that control RPM of your engine ??? What I mean ... there is something - kind of small motor, that controls the RPM. When you start your engine and you don't have any gear it holds the RPM on cca 1000 RPM. But in winter (when the engine is cold) it brings the RPM to 1500 ... and then, when the engine becomes warmer, it decreases the RPM. 1. How do you call the part, that controls these RPM ??? 2. Is there any restriction that says what is the maximum RPM that this "small motor" can provide... like it will not make more then 2000RPM ... or you could set it up up to 7000RPM as well ??? Thank you in advance...

Question by zholy 8 years ago  |  last reply 8 years ago


A hot box full of Satan!!!

I'm already preparing for Halloween. One of the props I would like to build is a box to hold "Satan." I'm not yet sure what I want it to look like (rock? metal?)... but I do know that I want it to be warm to the touch. Not HOT... nothing that would actually harm anyone... but obviously - and devilishly - warm. My first best thought is to take something like an old-school metal lunchbox, create false walls on the top and bottom, and then put SOMETHING in the in-between spot. But what? Chemical hand warmers? Something battery-operated. Your ideas are welcomed. And if a little bit of smoke could come out, all the better. Please shout if you need any clarification!!! Thanks!!!

Topic by Purple Chez 1 year ago  |  last reply 1 year ago


Are tube type amps really better than solid state type amps? Answered

A question below reminded me of this. My friend and neighbor plays a guitar and has been going on about how great his new Fender tube amp is and how much better it sounds than the solid state amp he previously used. Truthfully, I've listened to him play on both (he's no Chet Atkins for sure) and I can't discern much, if any difference. I've done a little research and heard words like, "warmer,"  "more vibrant" and "louder" used to describe the difference. With the exception of louder, most of these descriptions are not actually measurable. Is there a way to definitively say tubes are better, or is it just a subjective quality that depends upon the ear of the listener?

Question by Burf 8 years ago  |  last reply 5 years ago


Turn laptop speakers into aux speakers

My laptop just died and I took it apart. The speakers have a 4-pin connector, which I would like to splice into aux and power to make an aux enabled speaker I can use. How do I do this? Pics: https://goo.gl/photos/PdyBhVxXLBfJfL3Z8 Thanks and RIP laptop. A little eulogy, because why not: Dear laptop, you will be missed. I had you for 5 years and you were a great machine. I took you apart and put you back together. We had a great time together and you lived a long life. I hope you have a great afterlife as a set of speakers, external monitor, hand warmer, and many more projects. You will be missed.

Topic by Nmoleo­ 2 years ago  |  last reply 2 years ago


Range finder using RF and an arduino?

One of the projects I've been spit-balling for a very long time requires me to be able to build some sort of range finder (if I'm using the correct term). Basically, I would like to create a "finder" unit and a "hider" unit[s]. My thought would be to us RF of some sort, so the "hider" unit will spit out a certain frequency, that the "finder" will pick up and react to (in this case, speed up the blinking of some LED's and turn some servo's to set levels). This doesn't need to be exact. So long as I can detect a decent range so I have a cold, warm, warmer, and on fire points to use, it'll do the desired deed. Price is another factor, as I would like to keep this around the ballpark of $30 per unit.  Thanks in advance!! 

Question by DoctorWoo 4 years ago  |  last reply 4 years ago


Cold thermostat and temperature recorder.

Cold thermostat and temperature recorder. Good day everyone! I luckly obtained for free a freezer with a broken thermostat. I am planning to brew some lager beer, so I would like to replace the thermostat with a digital one, in order to set the temperature on 4°C / 39,2°F / 277,15K (ahah) (lager beer brewing temperature!) and to record it during the fermenting process, transfering then the data on my computer. Before I get lost through the universe of electronics, could anyone of you give me a good advice on where to look? I suppose an Arduino could do the trick, but I know almost nothing about it; so i ask you. Otherwise, I scavenged a "working", non-digital fridge thermostat, but I've just seen that it makes the freezer to get no warmer than -10°C: does anyone know if it is fixable and how to? Many thanks for the attention, and have a good day!

Question by FrancescoC12 2 years ago  |  last reply 2 years ago


Grippy stuff for sports clothes

Hi hi, i have an old pair of cyclist's leg warmers. they have lost some of their elastic action, and they fall down almost straight away. I went and bought some new elastic to sew onto them, but also wanted to stick some gripper stuff on the inside. The gripper stuff is found on most knicks and cycle shorts now; it's some sort of silicone or rubber that grips to your leg. I don't know what exactly it is, so didn't want to go out to the hardware store and just buy some tube of silicone, only to find out it irritates the hell out of my skin or just doesn't do the job. I tried a (big) sewing supplies store, but they had no idea what it could be. Can anyone help? I'm in Australia. I saw that in the states you can buy elastic with the gripper already on it, which is a bit of a pain. The gripper stuff is used by skiers and canoeists too... Cheers, Ben

Topic by bluenevus 11 years ago  |  last reply 11 years ago


Minecraft Pigs, Sea Creatures, Blueberry Hair Barrettes and More at Knox Makers @ InstaMorph Build Night

Members and guests of Knox Makers had a great time experimenting with InstaMorph during our Build Nights. First, we tried using InstaMorph with heat guns and magnetic metal shop trays because that is all that we had at the time. We figured out a few important things pretty quick: Metal gets hot. Metal heat guns stick to magnetic shop trays. InstaMorph sticks to EVERYTHING. This led us to important realizations: We need olive oil. We need to avoid magnetic shop trays for this purpose. Through experimentation, we figured out that putting colored thermoplastic pellets on top of InstaMorph projects and then gently heating can cause cool effects where the pellets melt into the InstaMorph in wild and beautiful patterns. We had fun creating sea creatures together, everyone felt comfortable diving into their own projects, and we even used the InstaMorph to craft our own set of tongs for crafting InstaMorph, because meta. We broke down and got hold of a digital induction warmer and pan made for it. This made things go more smooth. Or rather, more safe. We found out that the InstaMorph does OK at the recommended temperature at our sea level (approximately 265 meters elevation above the sea level), but it cools and hardens VERY quickly and is difficult to work with. Most of our participants actually seemed to enjoy the more dangerous heat fun method more than the digital induction warmer method. We did not try other methods and we suspect that noninduction water heating would have worked a little better. We had multiple Build Nights with the InstaMorph to give plenty of people in the community time to toy around with it and come back with their own ideas. We also had members and guests experiment during our Open Hack Nights and at other times. In all, we had a blast. We ended up with 8 different tutorials out of it all, and you can check them out here in this collection: https://www.instructables.com/id/Knox-Makers-InstaMorph-Projects/ We may add more over time, depending on interest. Thanks for reading!

Topic by smalltortoise 3 years ago


What is the best wire for generating heat? Answered

I am making an Instructable for some contests. The basic concept is below: -Put two peltier modules on each bloodline on the neck -Put small heat sinks that takes advantage of wind on the other sides of the peltier modules -Use the electricity generated by the peltier modules (While skiing in ~20F) on a heat-generating device located near the hands -Cover the parts that I can with some fabric and possibly build it into a neck warmer or face mask So my question here is: What kind of wire should I use to generate the heat on my hands? I'm looking for high-efficiency and fast to generate the heat Also, do you see any flaws in my concept that I should change? Lastly, the most important question I feel I should ask here is: Will the peltier modules generate enough electricity to make a significant difference on the heat of my hands? My hands get cold enough to hurt when I go back into room temperature if that helps.

Question by knexpert1700 4 years ago  |  last reply 4 years ago