Looking for a thermostat

I am a science teacher and need help finding a thermostat to fix the department's water distiller. It looks very similar to the "Waterwise 9000 contemporary distiller" but is slightly different in appearance. The basic operation is you fill the reservoir and turn it on, the water boils and is then condensed and drips into the bottle that slides into the front of the device. When the heater reaches a certain temperature a thermostat turns on the cooling fan, when the device cools to below that temperature the cooling fan turns off. There are lots of warnings about running it without the fan because it will burn out the heater. I have tested the heater and it works fine, I can bypass the thermostat and the fan works fine, but the thermostat no longer switches on the fan. If I can find a replacement thermostat that should fix the entire distiller but it seems to be a custom order only for the manufacturer who wants you to buy a whole new distiller. Can anyone suggest an appropriate substitute? The code on the side of the thermostat is:  36tme02 22471 f150-15f p185-97 a0615 I found a similar image on the emerson site for a 36T thermodisc thermostat http://www.thermodisc.com/en-US/Products/Bimetal/Pages/36T.aspx Does anyone know how to figure out the switching temperature from the code from the side of the thermostat? Any suggestions are appreciated!

Topic by CitizenScientist   |  last reply


room thermostat

First things first notice: Iam in Europe so it's probably a bit different than in USA. I have electric radiator in my room. i bought thermo switch but i don't know how to connect it between the socket and the radiator. I must mention that the radiator had already same thermo switch before but it broke down after 5 years and I didn't write notes how it was connected. I already blown 4 fuses during the attempt. The wire has three wires: blue ("live"), brown and yellow/ green ("earth"). In the switch there's sheme sticker -> www.shrani.si/f/C/Nr/42sKtVVC/thermo.png . so how do i connect the plug and the radiator??  www.imit.it/dati/schedaArticolo.php

Topic by Karletto555   |  last reply



smart window thermostat

Wanted: circuit to open window at night when it is cooler outside than in. Close it when hotter outside in morn. Probably add something to prevent it from opening and closing several times in the eve and morn with random fluctuations. Prefer 2 thermostats, 1 outside, one in, rather than a timer. I've a vague recollection of a circuit with 2 potentiometers, one on the motor, one on the control panel, such that turning the control pot will activate the motor until its pot is at the same position as ctrl pot.. Could a circuit something  like this control my window? But most thermostats are on/off, not continuous variable.   It would be simple to do a switch logic thing like:  “IF thermo ‘I’ is above 70 AND thermo ‘O’ is below 70, THEN OPEN “  but that only works at 1 temp.

Topic by Toga_Dan   |  last reply


Circulating pump with thermostat

I have a 1550 gallon water holding tank and plumbing in an outshed in Fairbanks, Alaska. The pump and pressure tank are also in the outshed heated with an electric heater. To save energy I'm thinking to install a circulating pump inside the tank that circulates through the plumbing inside the outshed to keep it from freezing but not necessarily to the portion of water pipe going under ground to the crawlspace of the house. It should also have a thermostat to start heating when the temp of the water gets to 32 degrees or so. Is there any such thing and if so, how would it be installed? Thanks!

Question by icicle46   |  last reply


modify wine cooler thermostat refrigerator thermostat operating temperature

Hello. Can someone please tell me how to modify the thermostat on a wine cooler (that uses a compressor). I want to change the temperature from running between 10c-18c to 0c-5c. Please post an instructable or give me ideas- even if generic, it would be helpful.I am specifically trying to modify a baumatic bw18.

Topic by drosengarten   |  last reply


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   |  last reply


120v thermostats: need help building or sourcing

I'm planning to build an incubator, and I need something to help regulate the temperature.   I've found some in-line thermostats online, but if I had a parts list, I could easily wire something myself.  Does anyone have any knowledge or experience they can share with me?  Thanks!

Topic by awascholl   |  last reply


how to install an electronic thermostat?

I want to replace my old style AC/Heater thermostat with a new one that has electronic temperature settings. I do not necessarily need to have a programmable thermostat. the heat/AC unit is electric

Question by    |  last reply


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   |  last reply


How to wire a fan to a thermostat? Answered

I have a fan for a greenhouse that I need to turn on at certain times to counteract the Texas heat, I was just wandering if I could just go to a garage sale and buy one then wire it to the power chord or is there a special small one that plugs into the wall socket. Also how would I go about instaling a thermostat in the greenhouse.

Question by zootsuitman   |  last reply


Simple/ and or cheap variable thermostat?

Well I have a friend who is looking into the purchase of a snake, and meanwhile picking out the snake and the heating element isn't the hard part for him (he's looking at a 23 watt 120vac heating pad for it). He was also looking at a thermostat designed for snake tanks, however they want close to $150 for it, and it doesn't even have many features, it's basically a black box with an 3 digit lcd and a programable timer. I know it wouldn't be hard to put something similar together from a pic and a few different parts, however it's been a long few years since I've designed a full schematic of something, let alone look at one. So I was wondering if someone so kind might aid me in making of a schematic so my friend can go order the parts he needs and I can build it for him (don't have a problem assembying circuits from raw schematics, I find it fun). However, there is a couple things he wants out of it. Number one most importantly, he wants it to be able to adjust the output voltage so he doesn't fry his snake (most simple thermostats simply turn on until temperature is reached, then off), no he wants something more dynamic than that. Second, he needs to have an external temperature probe so that he can keep the thermostat outside of the tank whilst keeping a handy eye on the temp and also obviously so that the thermostat knows when to come on (is there a limit to the length of wire you can put on a thermocouple?). Third and last, we need a simple timer circuit that keeps track of the time (what's that involve? a 13mhz crystal and a few other parts?) so that at night the thermostat can change it's "heating schedual", I assume so that it tries to maintain a temperature say 3-4C above the programmed temp. (night mode anyone?) However the thermostat he was looking at buying wanted you to buy a second cord, which connected to an external appliance timer (yes you heard me, a $9 wall timer) so that it knows what time it was. My friend really needs this as he's looking into getting this snake within the month. I appreciate anything anyone has to offer. Thanks guys! -Punkguyta

Topic by Punkguyta   |  last reply


Thermostat stopped lighting up.

Atlantic electric sais transformer bad, put one in, nothing. tested outgoing still no volts,. caked fuse fine, ck power into unit good, then caked going into transformer nothing. what could be problem?

Question by JohnS114   |  last reply



Does anyone know of a digital thermostat that can power electric heaters? But... [read on]

Does anyone know of a digital thermostat that can simply call for heat if the temp falls below a given set point, and stops calling when the temp is at or above the set point - to a resolution of 0.1C?  This is for electrical heating control, so I don't want it to minimise the number of power cycles - it can come on and off as often as it needs.  Most digistats such as Drayton try to minimise the number of power cycles, as you'd want if it was controlling a boiler, but for electric heat this shouldn't matter.  I'm want a simple "call for heat if below the exact set point, otherwise don't call for heat".  Any ideas?

Question by proximac   |  last reply


House hold heating? Answered

Like most UK houses my thermostat is in the coldest part of the house - The entrance hall. Although I have recently fitted thermostatic valves fitted to all radiators I can't help but feel the heating would be more effective if I simply controlled the temperature in the room we spend most time in during the evening- The lounge. I guess this would mean the rest of the house would be cooler than at present but that isn't really a problems for us. Is there any reason, anyone knows, not to do this? Has anyone gone down the smart thermostat route? https://nest.com/uk/thermostat/life-with-nest-thermostat/ New high efficiency condensing boiler Thermostatic radiator valves through the house High level of insulation to walls and roof. Double glazing all round in PVC frames.

Question by rickharris   |  last reply


Need help diagnosing my non-working gas wall heater.? Answered

Hello, I live in Arizona so we just tried to use our gas wall heater for the first time tonight (hasn't been necessary before now).  This is the type of heater we have installed in our hallway/bedroom. http://www.homedepot.com/buy/williams-monterey-50-000-btu-natural-gas-top-vent-wall-furnace-5009622.html#.UJ-qvYaElhE I lit the pilot and then moved up to the thermostat that is mounted on the wall.  I moved the dial from the left (which starts at 50) over to the far right (which stops at 90).  I felt and heard the thermostat click over at about the 65 degree mark (which seems accurate to me), but nothing happens.  Usually, immediately after the thermostat clicks over, the gas flow increases, and the heater starts to do its thing. I have included some pictures of the thermostat, and heater itself.  If someone could tell me which connections I need to check with a volt meter, it would be greatly appreciated. One thing I want to add, we had a light socket go out on the same wall about a month ago, that doesn't seem to be getting any power.  I have tried several new bulbs and it doesn't work.  So I would need to figure out how to check if the thermostat is even getting power as well.  It's possible that the thermostat isn't even getting power. Thanks SOLVED:  Thanks everyone for your replies.  It actually was the solenoid inside of the heater, but the good news is it works fine, a wire just came loose.  Everything is working great now.  I wouldn't have thought to look there if it wasn't for your comments.  Thanks again!

Question by Herdo   |  last reply


I need to source a very small thermal switch that would fit beside a peltier and open at approx 50 C. Answered

This is to prevent someone from getting a burn. I was thinking of the small battery cut offs but I do not know if they reset once opened.  The smaller the better as it would be ideal if it was flush with the peltier. I would like to wire it to the power source as a simple mechanical thermostat.  Power supply ranges from 5V, 500ma to 13V, 1A. It needs to be simple as there is no logic board. Thanks, Paul

Question by messyworkbench   |  last reply


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   |  last reply


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   |  last reply


I have a question about an attic exhaust fan hooked up to a thermostat. Can I connect an on off switch up as well? Answered

I have an attic exhaust fan hooked up to a thermostat.  Can I also wire it to a switch so I can turn it on and off when I want to in addition to having the thermostat turn it on when temperature reaches the set temp?

Question by David H   |  last reply


Workspaces

Does anyone work in an out-of-the-house space? I just published a blog post about how I keep my wood shop warm, just wondering if anyone here has stories to share about their workspace. Also, does anyone have experience with thermostats? I wouldn't mind a critical eye to review my post. Thanks, David J. Ulschmid www.thelumberlab.com http://www.thelumberlab.com/2011/thermostat-types-for-shop-heaters/

Topic by DUlschm   |  last reply


I need to create some type of gadget that will automatically loosen and tighten a bolt or screw for me at certain times!

It would need to be attached to a thermostat or timer that will automatically loosen and tighten a bolt or screw when it hits a certain temperature or at a certain time. Any ideas?

Question by    |  last reply


Temperature Monitoring - Brewing Beer

Hello! I am new to here. I have done a bit of coding in the past, but not really delved too deeply into the hardware side of things.  I am currently brewing beer and would like to make something with a thermostat that I can attach to the outside of a plastic bucket to monitor the brewing beers temperature. The thermostat would need to have a bit of length to it. It would also be amazing to record this data on a computer. Can anyone help me out, and point me in the right direction?  Much appreciated! Thanks, Ged

Topic by GedK   |  last reply


How to make Finches - Love Bird Incubator

Hi, I have read many blogs on how to build our own small incubator for my finches or hen eggs. The problem is every blog, instructable, guide shows to put 25 watt bulb, but my question is.. Is there any possiblity to put some automatic thermostat which gets on when the temperature is lower then desired  temperature (eg. 102-103 degree fahrenheit) and the thermostat should shut down when the temperature is reached to desired temperature. Using bulb can not be effective in different climat condition and after a long run it becomes very hot inside the incubatore, plus it needs extra attention during the incubation period. I checked on net for this type of automatic thermostate but it is too costly and basically made to control for room temperature. Any guidance on low cost automatic temperature control where a user can set temperature for low temperature of appx 100-103 degree fahrenheit would be much appreciable. Thanks in Advance. Rohit

Topic by Rohit.Agrawal   |  last reply


AC Wall Unit Timer/Thermostat

I have an older AC wall unit in my apartment. It has 3 dials – one for temperature (1-8 where 8 is coldest), one for fan speeds (low cold, high cold, low fan, high fan), and a manual lever that opens the vent in the back. I’m reciting this by memory as I haven’t actually looked at it closely, but it has one of the larger 3 pronged cables that plugs into a dedicated outlet in my wall (perhaps used for a higher voltage). In any case, my intentions are as follows:    • Have a timer for the AC unit to plug into to turn off on programmable intervals           o Monday – Friday it will be on after 6:00pm until 7:00am the following morning.    • One nice feature would be to give it a thermostat capability.           o If the temperature is below 70 degrees during these time intervals, for instance, then the AC unit will shut off, otherwise it will power back on.    • Another obscure (and I’m sure complex) feature would be to allow remote access to the timer. I know that this requires some unique hardware, but I’m familiar with programming and can visualize the methodology in telling the timer/thermostat unit a different set of commands (let’s say I know that I’m coming home early – I send information to the device via the internet to have it turn on a few minutes before I get home). I understand the last part is quite complex, but it’s not a priority at all, rather, a neat little feature that would make this all the more worthwhile (and in my eyes more interesting). I know that there is a similar device out there (can’t remember the brand name) that has a lot of these features, but I’m not willing to drop $300+ on something like that. For now, my priorities are listed in order per the bullets. First and foremost is being able to program a timer for a wall AC unit. Second is to have it detect the temperature of the room and set it accordingly. And third is the availability to ‘talk’ to the device remotely. My question for you is: how can I get through the logistics on this sort of project? What components (hardware) am I looking at (general price range), and what degree of difficulty will this entail? I have my computer practically right next to my AC unit, so communication with the device won’t be difficult in those regards. Otherwise, I’m just looking for tips and pointers. If someone happens to know of a (cheap) unit that does most everything that I’m looking for, then great. I’m all ears and really appreciate any feedback.

Topic by Phoenix5794   |  last reply



Home Theater exhaust system

Short version thermostat controlled home theater exhaust. using trip method for computer psu to power fans. will it work if so any suggestions on thermostat and how to wire it. i am very basic right now on electronic wiring long version explained out I am in need of a exhaust system for my home theater. i have to much going on. 1 receiver, dvr, xbox 360, home theater pc/gaming machine, playstation 3, xbox 360 hd-dvd rom, and all the charging for the controllers and the logitech 880 remote, I also have a LG tv which can get a bit warm all this is housed in one of those hometheater entertainment center that has two towers on either side of a lower base for the tv where the devices go under and gets very warm. the towers are smaller for dvds. now that i have explained my set up i will explain what i am to do. i want to mount 2 fans behind each device .... there is no glass in front of device so for know everything will exhaust. i am using computer fans prolly 4inch ones. now here is what i am wandering i want to have the system controlled by a thermostat and i need suggestions on what to do. i am using the old trip method where u put one side of a wire in the psu green hole and one in the black and that turns it on with one simple switch i want to put a thermostat in the middle. does anyone now if this is possible if so what thermostat would u recommend and is there anything else you might include to increase cooling thanx so much for your time

Topic by tdpolo26   |  last reply


I have a electric heater that uses a dial, can I link it to a machine to turn it on/off depending on the temperature?

The electric heater is not linked to a thermostat and has a dial (rotates between 120-150 degrees range) on it to control its intensity. I am thinking perhaps to link it to a thermometer to control its intensity when it reaches some temperature thresholds and depending on the time of the day (preferably a schedule). Pics available on request

Question by knightdaemon   |  last reply


how would I heat and ventilate a single slice of bacon oven?

I am building a tiny bacon oven, and I want to have it cook in 10 minutes as if it were in the oven.  But the real puropse is to get the great bacon smell out of the bacon oven, while maintaining the heat to cook the bacon at 350F.  Any good ideas?

Question by rocklobster21   |  last reply


Heating Control

I have been thinking for some years now that I would like to have finer control over my central heating. The problem Now we are older we feel the cold more so in winter the heating is on all the time. This means that we have to keep altering the thermostat on each radiator at different times of the day or just leave them and so waste energy. One method means wasting energy but the other means rooms will be colder than we want initially.   The system and what i have We have a combination boiler which has a digital timer and also on the panel are temperature controls for hot water and radiator temperature. Each radiator has a thermostatic valve so each room can have it's temperature set independently. I have a computer which runs 24/7 and also a bit whacker which I can control via python code and electronics has been a hobby for over 50 years My idea I would like to have some system which would allow me to adjust each room temperature via computer control.   Possible solutions Solution 1 Fit a stepper motor to each thermostatic valve to adjust it at different times of the day/night. This would allow precise control but would be quite expensive to set up. Solution 2 Fit a small structure round each valve with a filament bulb or resistance wire in the bottom so that when power is applied to it then the temperature around the valve will rise and so the valve will close or, at least partially close. I think this would be much cheaper to implement but would have the small on-going cost of using power to the bulbs whenever the room temperature needs to be cooler that it would normally be. My initial plan Build a small structure around one of the valves with a low voltage bulb in it. It would have vents at top and bottom and so air would circulate. I have a portable digital thermometer so i could gather information and try different bulbs to see how much power would be needed and therefore what the on-going cost would be. Also try various shapes of structure to see what the effect would be.   So guys what do you think?

Topic by buteman   |  last reply


Relay to control window air unit - first attempt failed (seeking advice)

I'm working on a thermostat project to control window AC units (which I will create an instructable for when it works). The need is to switch on and off an AC unit. The unit runs on 240 VAC (split phase) and the technical documentation says to put it on a circuit with a 20 AMP circuit breaker. I will be controlling the relay with 5 volts from an Arduino (although I suppose I can use an additional small relay to control the larger relay with a higher control voltage, if necessary... the less moving parts the better.) I already tried with a 20 AMP Solid State Relay (SSR) from Omron, but it failed. The problem is that, due to the voltage drop in an SSR, they get really hot. The hotter they get, the less current they are able to switch. The other problem is that SSRs fail with the circuit closed or partially closed. This is not ideal. You wouldn't want to come back to your place after a vacation and find your AC had been running constantly the whole time... I am thinking I need to use an electromechanical relay, but there are so many options on Mouser that I'm feeling a bit overwhelmed! Can someone please help point me in the right direction or suggest a good relay to use?

Topic by morph3ous   |  last reply


Need help with heated wire installation not using a thermostat

  I am trying to use some wire for radiant floor heating to warm an area. I have a separate way to turn the current on/ off without a thermostat. I just need to know what the thermostat output is. I have 110 and 220 V  AC outputs available. Do I need to convert this to DC?  

Topic by stino66   |  last reply


Upgraded a 12vac to 24vac z-wave thermostat for A/C unit also adding transformer???

I decided to install a Z-wave Thermostat after an old ordinary one failed to work, It worked fine with home automation and all, apart from it being 24vac thermostat but receiving only 12vac from the motherboard (I was forced to change the batteries every 3 months), To make life easier (and not have to change batteries) I ended up doing  the stupid thing tying to Upgrade from 12vac to 24vac adding a transformer, it worked fine for the first 5 mins and then stopped, it was then that I realised I may have overloaded the mother board, My question is, is there a quick fix for this? or do I have to replace the whole motherboard?, if so which one?

Topic by BozS1   |  last reply


What is a good mechanical relay to use to power on an off a wall airconditioning unit? Answered

Cross-posted from here: https://www.instructables.com/community/Relay-to-control-window-air-unit-first-attempt-f/ I'm working on a thermostat project to control window AC units (which I will create an instructable for when it works). The need is to switch on and off an AC unit. The unit runs on 240 VAC (split phase) and the technical documentation says to put it on a circuit with a 20 AMP circuit breaker. I will be controlling the relay with 5 volts from an Arduino (although I suppose I can use an additional small relay to control the larger relay with a higher control voltage, if necessary... the less moving parts the better.) I already tried with a 20 AMP Solid State Relay (SSR) from Omron, but it failed. The problem is that, due to the voltage drop in an SSR, they get really hot. The hotter they get, the less current they are able to switch. The other problem is that SSRs fail with the circuit closed or partially closed. This is not ideal. You wouldn't want to come back to your place after a vacation and find your AC had been running constantly the whole time... I am thinking I need to use an electromechanical relay, but there are so many options on Mouser that I'm feeling a bit overwhelmed! Can someone please help point me in the right direction or suggest a good relay to use?

Question by morph3ous   |  last reply


Smoker Grill

Looking at the DIY's for a smoker grill, why not just use your weber grill with the hotplate, air slots at bottom can give access to hot plate thermostat. You can make a rod with an end fitting to fit over the thermostat knob for fine tuning during operation.

Topic by phantom9   |  last reply


How can I regulate amperage from going over a set point?

I have a very expensive IP addressable thermostat and the relays can only handle .5 amps, not very much at all, but for a 24 volt thermostat it is plenty. The house was hit by lightning 1 year ago and now I am getting spikes of .75 amps and I have fried 2 more $400.00 thermostats, can I use a resistor or some type of regulator to control this?

Question by pioneer407   |  last reply


Help with understanding pinout on circuit board

I'm an HVAC technician and at school they had a bunch of Carrier EMI thermostats that connect to a router with a module. I'm pretty tech-savvy, but I'm not the greatest when it comes to wireless technology. On the board there are spots labeled: Tx, Rx, A2D2, GNDs, GNDp, and 12vdc. Then there are another 2 labeled OAT and OATC. What do these all mean? All I know is that Tx and Rx are transmitting and receiving. Any help is much appreciated.

Topic by musick_08   |  last reply


Smoker Grills

Looking over the DIY's for smoker grills. Why not use your Weber Charcoal Grill with the hot plate ? Slots at the bottom can provide access to hot plate thermostat. You would need to make a tool, rod with end fitting to engage the thermostat knob. cord can exit the grill through one of the bottom slots.

Topic by phantom9   |  last reply


Small fan hooked up to a thermosta to cool a computer in vented furniture

I have a tower compute that I have put in a enclosed desk that I cut several vent holes but want to instal a fan as backup with a thermostat to insure proper ventilation. I was thinking buying a small desk fan that fit the space connected to a thermostat inside the enclosed space where the computer sits. 

Question by Richard Breffeilh    |  last reply


Hunter Thermostat for a heat pump how to get the a/c working...?

We had this guy install a Hunter Thermostat and replace a coil so we could get heat when it was real cold. Well now that it is getting hot we want to run the a/c but it's not working right when you put it on a/c it blows out hot air and gets hotter as it blows. He hooked all the wires up except for a purple wire he said didnt need that one and put a jumper from one wire to another. The heat started working right away. At the time we were worried about heat because it was cold. Now that we found out there is a problem with the a/c we can't get the guy to come back out or the guy that was the one that put in the heat pump and did all the wiring for it. He doesn't like working with Huter digatal themostat so he is avoiding us. But I want it fixed can anything pls help me try to fix it. Tks Jennifer It is a Hunter Touchscreen Programmable thermostat model 44860 2 stage heat/2 stage cool

Question by jennyksva   |  last reply


Is it possible to set the thermostat (temperature) on an air conditioner window mount unit below the factory setting?

I am trying to convert a 7' x 7' x 7' insulated room into a cooler with a temperature of 34 to 40 degrees by using an A/C unit and cannot cool the room below the 60 degree factory setting. I have tried isolating the temperature probe, but the unit just ices up. Any ideas would be appreciated. Thank-you

Question by    |  last reply


Manipulating temperature in garment steamer

 I have a garment steamer. As a school project, I need to do an innovation where I need to add temperature regulator features. I have read that irons use thermostat to control the temperature, how do i install a thermostat in the steamer or is there other ways to regulate the temperature. By the temperature regulator, i should be able to produce the right amount of steam at the right temperature for each fabric.

Topic by WafiqahK 


Creating a more inexpensive sous vide controller ($27)

While i was at home depot the other day, i noticed that a thermostat from an electronic water heater could possibly used for (almost precise) sous vide. Temperature regulation (it goes from 120 F to 150 F). The question is, i need your minds to help me in collaborating on a circuit setup which makes this possible. Thermostat: Costs: $14 Plug to plug your slow cooker in: $3 Pump to circulate water: $10 Total Cost: (without cooker): $27 *Future Instructable Contents* -As the thermostat works through surface contact, Place the Thermostat  near the top of the metal vessel. -In order to better stabilize temperatures, make sure the heater is near   the bottom of the vessel. (we'll just use a heat plate or something like that) -Use a pump to stabilize the temperature better. -The knob just really requires better calibration. Hystersis: 18 Degrees. The million dollar question Just say i set it at 150 and the hystersis is 18 degrees, that means it will turn back on at 132. Especially with sous vide, Is all that matters is that the food stay at the top temperature, (say 150) and it can go to 132 as long as the solution as a  whole never goes above 150? In theory, this setup will just require more time to to heat evenly and correctly. Sources question: http://www.privatedata.com/byb/rocketry/composites/ovens/Propellant%20and%20Composite%20Post%20Cure%20Oven.html

Topic by compatta   |  last reply


2 Position Servo Controller

I need some help, I am trying to create a damper control using a servo and a 555 timer. Is there anyway that you can use a 555 timer to make a servo move back and forth between 2 positions (0 degrees and 90 degrees) with an with and on/off signal and not a pot? So when the thermostat sends power, the damper moves to 90 degrees, then when the thermostat shuts off the servo returns to 0 degrees? Thanks for the help in advance. -Ryan

Topic by WingmanSVT   |  last reply


Ever Repair a Electric Popcorn Kettle Before?

We have a popcorn machine at work.   The kettle died and I took it home to fix. I didn't know a ton about them before but after working on it it seems to mainly consist of a heating element, a thermostat and an in-line fuse. I replaced the fuse but each time I would turn the thing on it would cook one batch of popcorn (much faster than before and not as well) and then not be able to do another.  It seemed like the fuse was burning out.   I had replaced it with the same model number as before. So I replaced the thermostat too.   Still, the same thing happens.   I tried reversing the poles in case I put the wires back in backwards and didn't realize it, in case that mattered, but no effect. I adjusted the thermostat, both old and new turning them down and down by what should be 200 degrees in the end but was getting the same effect, like the thermostat wasn't the issue. Does anybody have any ideas what is going on here?   Is there maybe some inline resistor in the heating element I'll never be able to get to or see or something? Adding a picture.   The two white wires are power, the green is a ground.  There's nothing but wire beyond where they go.

Topic by technicallyartistic   |  last reply


Overheating Car - Causes and Short - Term Solutions

Overheating of the engine not only occurs in the summer, but can also occur in daily driving. In particularly, high-speed running cars, engines, and air-conditioning systems can cause boiling phenomenon when the water temperature is too high. It's dangerous to overheat the engine. It may hard luck that what can damage the engine. When driving on highways at a higher speed, or when climbing a car, if the pointer of the water temperature gauge enters the red zone and stays high, appropriate measures should be taken at this time. Here's how to handle the engine overheating.There are many causes of overheating, including insufficient coolant, cooling fan cooling the coolant has failed, thermostat failure, and coolant temperature sensor failure. If you deal with it improperly, it can lead to an expensive engine failure. Therefore, timely detection and proper disposal of overheating can effectively reduce losses.First, poor engine cooling: Poor engine cooling can cause the water temperature in the tank to be too high. When longer the water tank is used, the more internal scale will build up, resulting in poor heat dissipation in the radiator. The water with too high temperature will not release heat, and it will evolve into a "pan". In addition, the ventilation hole of the radiator is also a common cause of poor heat dissipation. If the external blockage is not ventilated, use a water gun to clean it up. If the inside of the radiator is blocked, then clean it with a cleaning solution. Second, the cooling system is not working properly, resulting in poor heat dissipation. At this time, check the tightness of the fan belt and whether the fan blades are deformed or broken.Third, the thermostat automatically adjusts the amount of water entering in to the radiator according to the temperature of the cooling water, so as to ensure that the engine works within a suitable temperature range, which can play a role in saving energy consumption. If the engine is overheated, check that the thermostat is working properly. Starts at 70°C and fully open at 83°C. When the height of the fully opened valve is not less than 9 mm, the thermostat can be put into the water for heating inspection. If the thermostat can't be opened or the opening degree is not enough, the thermostat needs to be replaced.

Topic by violantez   |  last reply


208/240 transformer question

After having several (like 4) thermostats fail in a 6-year period, it finally dawned on me to check the voltage from the transformer and I found it to be a bit over 28 volts. My condo building has 208V service. The transformer in my air handler is a 208/240V one and was wired to the 208V terminal. I removed the wire from the 208V terminal and connected it to the 240V terminal and then found the voltage to be 24.2V. So I have possibly solved the problem of the thermostats failing but my question is, will this cause any damage to the primary (or secondary) of the transformer? Thanks in advance!

Topic by kvander51   |  last reply


Arduino Reptile Pulse Proportional Thermsotat

Hi, I have kept many reptiles in the past and use this type of thermostat control with any of my non-light emitting heat sources such as ceramics, heat mats etc but these thermostats are pricey for every setup. An idea I had was to maybe incorporate an Arduino since I have one lying round to be able to control multiple input/outputs for more than one tank, but i do not know how to go about building one and what pulse proportional means. I have used Arduino before and familiar with C programming but not done much with controlling AC electrics other than either on/off using relays (ideal for simple thermostats tho like MatStats from livingearth). So would it be as easy as to find a PWM AC controller and make the Arduino change the duty cycle depending on how close the temperature actually is compared to the set point? Or would I need to use PID control? Any ideas would be great. 

Topic by rowly747   |  last reply


Miniature oven

Please don't laugh but I am building a small working oven for my daughter and need a heating element that can heat it from 70 to 220 degrees celsius via a thermostat. I've found this heating element http://uk.rs-online.com/web/p/ceramic-heating-elements/3762795/ or http://uk.rs-online.com/web/p/ceramic-heating-elements/1988529/ and this thermostat http://uk.rs-online.com/web/p/products/7334726/ but am not sure these are suitable and would work together. The oven will measure about 15cm wide x 8cm hit x 10cm deep but I don't have to stick to this.Any help or advice would be amazing. You're laughing aren't you? :)

Topic by gooseisloose   |  last reply