Greenhouse Heating

Hi, does anyone have any suggestions on a cheap efficient Heating System I can build myself for a Greenhouse?

Topic by lamar850   |  last reply


All Season greenhouse?

I live in Northern, Ontario, Canada. We get only a few warm months through the summer and its fairly cold for the rest of the year, dropping down to about 40 below, Celsius!!  I have a vegetable garden in my backyard that does fairly well during the summer but I would like to be able to have fresh vegetables for my family year round. Is there any way I could build an outdoor greenhouse that I can use year round, without costing a fortune?  I also have a spare room on the upper level of my house that I could use but I don't want it to become too humid and rot my walls. Any ideas would help! Thanks!

Question by kmarrello   |  last reply


need ideas on greenhouse

Hi there,I live in Boston, MA and I am looking for some advice on Greenhouse construction for winter gardening only (and vegetables that are appropriate for that as well). I am looking to build a greenhouse that I can put up in the fall and take down in the spring for growing a winter garden. It will have to be able to be taken apart into its components and stored in a shed in summer months since my family has no need for it then. Due to the fact that it will be used in the winter, it will have to be highly insulated and have a heat sink that will be able to help maintain a constant growing temperature for the plants inside. Ideally I would like to avoid expending much energy heating the greenhouse. I am, of course, also doing this on a budget. Here is what I have come up with so far. 1. I will use triple-wall or 5 wall polycarbonate panels for the walls of the greenhouse2. I have found a few insulating products that look like they could be useful3. I am thinking of using a solar collector water heater as part of the heat sink- easy to construct on my own : https://www.instructables.com/id/Solar-Thermal-Water-Heater-For-Less-Than-Five-Doll/ that could circulate hot water into the heat sink4. I am learning about heat sinks and thinking that I want to use the simplest design and organic materials (mud, rocks, or water) to hold the heat during the day and release it at night.5. The greenhouse footprint can’t be larger than 8’ x 10’ 6. I prefer the simplest construction that meets my needs (and the easiest to put up and take down)Questions that I have:1. What are the possibilities for using compost as a source of heat?2. What about a PVC frame?3. How would I circulate hot water through the heat sink?4. What are methods to reduce daily management of the project?5. Types of hinges to use?6. What type of material should I place the greenhouse on?- it will be sited on the concrete area around our swimming pool and I don’t know what sort of insulation is necessary after that. I had the idea of wood pallets with insulation inside them but that may not be enough at all.7. Any ideas of ways to re-use materials to do this cheaply and reduce waste?8. Any suggestions on the optimal shape of the greenhouse roof/sides to increase heat retention and circulation of warmer air.9. Any suggestions of retailers that might have the materials that I am looking for.Some links that have been useful so far:http://attra.ncat.org/attra-pub/solar-gh.html#storagehttp://growerssupply.com/farm/supplies/cat1;gs1_greenhouse_building_materials;gs1_corrugated_sheets_panels.html

Topic by ocea46   |  last reply


Ultralight Portable Greenhouse

I have always wanted to grow a dwarf fruit tree or tropical tree (10-15 ft tall), but living in a townhouse I don't have room to winter a tree indoors. I was wondering if anyone has ever heard of this being done for a single tree? Kind of like a "tree phonebooth" for winter, potentially with a heater run from my outdoor electrical outlet. Any thoughts on where to start? If we can get a theory together I will build it and post it.

Topic by karlmarks   |  last reply


How Can I build an inexpensive greenhouse?

I need to use very basic materials to build a greenhouse.

Question by DottieM   |  last reply


I'm trying to build a frame out of super unistrut channel.

I basically building a frame of a little house so that I can attached shade cloth to the top to shade my bonsai trees from the hot sun. I live in Texas and its hot! Also in the winter I'm going to but plastic on it and make it a greenhouse. I need something I can take apart and something that the wind isn't going to tear up. I have one made out of PVC pipe right now but the wind is picking away at it.

Question by nelsonmsn110   |  last reply


Build a wood greenhouse - Guide to build it -

I built a wood greenhouse on my backyard. Free guide:http://www.usa-gardening.com/greenhouse/greenhouse.html

Topic by jardinier   |  last reply



Will low e windows effect plant growth in a greenhouse?

I have a bunch of low e, argon filled double pane windows that I want to build a greenhouse with. Will the plants inside the greenhouse be adversely effected by this type of glass? I am not a "sciency" type - please advise me.

Question by Taskar   |  last reply


How would you seal the seams of a clear plastic greenhouse?

I want to connect pieces of clear heavy plastic together to make a house-shaped greenhouse, without using tape. Would a hot glue gun work or would it melt the plastic? Could I sew the pieces together or would the needle holes cause ripping? I'm afraid to use tape because I don't think it would stay on long term. If anyone has done this successfully, please share how you did it. Thanks!

Question by arnold54   |  last reply


Seeking initial points for designing and building a small dome-based greenhouse

I will document (stepwise, standardized, pictorially) what I do in terms of decisions, materials, tools, etc. Any kick-in-the-butt info is greatly appreciated. [Note: this and my orgone-based cloudbuster designs are my winter projects for spring implementations.] best wishes!

Question by frankfenderbender   |  last reply


how to use geothermal heat for a greenhouse? Answered

Greetings! I would like to tap a geothermal heat source to passively heat my greenhouse, but I know very little about how this is done. Any ideas or suggestions would be appreciated!

Question by RedMayor   |  last reply


can i make a greenhouse with double glazed windows

CAN I GROW PLANTS THAT WOULD GROW IN A GREENHOUSE IN MY CONSERVATORY?

Topic by frogcity   |  last reply


Help with building an off-grid solar powered greenhouse

Hey All!  I've been wanting to build an autonomous greenhouse (a growbox, frankly) in my apartment, as a proof of concept to build a real one in a place where is difficult to get energy to. I've some experience in building things, I know my way around a solder and given a schematic, I can pretty much do what needs to be done, but I have almost zero technical knowledge on the why the parts go where they go. My real question is if there is an instructable here that I haven't found that would allow me to build something that works like an alternator, that would allow my battery pack (4 unprotected 18650) to power the arduino controller when the solar panel isn't outputting energy enough and to recharge my battery pack when the solar panel outputs enough energy to power the arduino with some surplus (that would go to the battery). In case the battery pack is at full capacity, the excedent would be directed to a another output (that I would most likely not use, or would use something to drain that, like led strips or something). If there isn't an instructable, any site with this info would be nice. I also could use lots of Instructables (or outside sources) to build the thing. I tried to search for it, but english is not my first language, so I don't really know how to search for this. I don't know if I was clear enough or if this is the right place to ask. In case there's need for more info, just ask me, please! Thanks in advance for all of you who makes this community awesome!

Question by acustodio1   |  last reply


How many hours of direct sunlight comes from north of the east west line?

We all know that the sun rises in the east and sets in the west.  And it is true 2 days a year!   The other 363 days it is untrue.  I found a neat little website sollumis.com that  gives a  visual representation  of the sunlight at any day of the year and at any location and  in summer quite a lot comes from the northeast and northwest in the mornings and evenings. (where I live at about 49 degrees north). I thought the rays represented 20 minutes of sun travel originally but now I am not so sure because the hours of daylight in a day do not correspond with the number of degrees of sunlight.  Does anybody know how fast the sun goes down? Does it appear to speed up as it goes down in summer or does it appear at its fastest around noon?  If it goes down faster than it goes at noon then there will be less hours of sun north of the east west line but if it goes slower, there will be more hours of sun north of that line. I would like to know how many hours of light  come from north of the east west line so that I can  give a guesstimate about how much more light my lean away greenhouse collects compared to a lean to.  The various websites are good for giving the sun up and sundown times and angles but none I have found give the corresponding times for the sun passing  the east west line in morning and evening. It is a tricky question and I can make a physical model to figure it out but maybe someone already knows the answer. In the diagram the sunrise is 5.11 am and sunset is 9.17 pm and the sun rises at 52 degrees and goes down at 308 degrees.  The degrees divided by 360 do not tally with the hours divided by 24  0.67 for the hours and 0,71 for the degrees. Thanks for any help Brian

Topic by gaiatechnician   |  last reply


I have a picture of a greenhouse....however I am unable to find the blueprint design for it, I don't know where to look. Answered

Http://toolsworkingwood.files.wordpress.com/2012/12/wood-greenhouse-plans-free.jpg Here is the link to the picture....please help :)

Question by Snoopy_doopy   |  last reply


Arduino can control the temp, humidity, light, CO2 into my greenhouse?

Hello, can anyone tell me if Arduino can control in a greenhouse these parameters? - temperature - humidity - CO2 - light ..? I need for a temp, humidity rate, CO2 rate and so on the Arduino activates different tools in my greenhouse. Thanks!

Topic by NeroInferno   |  last reply



building winter greenhouse.... need ideas

Hi there,I live in Boston, MA and I am looking for some advice on Greenhouse construction for winter gardening only (and vegetables that are appropriate for that as well). I am looking to build a greenhouse that I can put up in the fall and take down in the spring for growing a winter garden. It will have to be able to be taken apart into its components and stored in a shed in summer months since my family has no need for it then. Due to the fact that it will be used in the winter, it will have to be highly insulated and have a heat sink that will be able to help maintain a constant growing temperature for the plants inside. Ideally I would like to avoid expending much energy heating the greenhouse. I am, of course, also doing this on a budget. Here is what I have come up with so far. 1. I will use triple-wall or 5 wall polycarbonate panels for the walls of the greenhouse2. I have found a few insulating products that look like they could be useful3. I am thinking of using a solar collector water heater as part of the heat sink- easy to construct on my own : https://www.instructables.com/id/Solar-Thermal-Water-Heater-For-Less-Than-Five-Doll/ that could circulate hot water into the heat sink4. I am learning about heat sinks and thinking that I want to use the simplest design and organic materials (mud, rocks, or water) to hold the heat during the day and release it at night.5. The greenhouse footprint can’t be larger than 8’ x 10’ 6. I prefer the simplest construction that meets my needs (and the easiest to put up and take down)Questions that I have:1. What are the possibilities for using compost as a source of heat?2. What about a PVC frame?3. How would I circulate hot water through the heat sink?4. What are methods to reduce daily management of the project?5. Types of hinges to use?6. What type of material should I place the greenhouse on?- it will be sited on the concrete area around our swimming pool and I don’t know what sort of insulation is necessary after that. I had the idea of wood pallets with insulation inside them but that may not be enough at all.7. Any ideas of ways to re-use materials to do this cheaply and reduce waste?8. Any suggestions on the optimal shape of the greenhouse roof/sides to increase heat retention and circulation of warmer air.9. Any suggestions of retailers that might have the materials that I am looking for.Some links that have been useful so far:http://attra.ncat.org/attra-pub/solar-gh.html#storagehttp://growerssupply.com/farm/supplies/cat1;gs1_greenhouse_building_materials;gs1_corrugated_sheets_panels.html

Topic by ocea46   |  last reply


Vaulted Dome Aquaponics Greenhouse Design

What do you think about this greenhouse design? It is for an aquaponics system. 192 sq ft so no permit is required in many areas. 9ft tall by 16ft wide, vaulted dome with center support for strong snow holding ability (snow should mostly slide off the vaulted dome anyway). Do you think people would want this in their yard if I offered to sell it to them?

Topic by Jaycub   |  last reply


Tripod greenhouse - cheap, easy, high volume

http://urbangreenhouse.blogspot.com/2011/06/stick-fork-in-it-its-done.html Currently in Paris to start an urban farming collective around this, details on that blog. Thoughts?

Topic by SolarFlower_org   |  last reply



Has anyone converted their "earth box" into a mini greenhouse to start growing their plants in?

I have converted two of my earth boxes into mini green houses and can grow 60 plants per box

Question by    |  last reply


. Which edible plants should I choose for my small greenhouse?

I'd like to start a small greenhouse from ikea in my balcony. It's an old model called Ort and as you can immagine it does not hold much space (about 1ft deep x 3ft wide x 6ft high with 2 or tree shelves in it). I'd like to plant something I can eat. and it definetly needs to fit in vases or other similar recipients. Which plants should I choose? I was thinking about beans, is it possible? Any other sujestion? Thanks

Question by EmcySquare   |  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


I deleted this question from instructables because they removed the ability to view an instuctable in its whole for free Answered

I deleted this question from instructables because they removed the ability to view an instuctable in its whole for free 11-2-09

Question by baudeagle   |  last reply


Is it possible to build a glass bottle wall that actually lets the light in?

I would like to incorporate my stash of glass bottles into a greenhouse, but all the articles I've seen so far call for the bottles to be filled with dirt when being used to construct a wall. What about using them upright instead of on their sides?

Question by jigsawinc   |  last reply


What's the coolest application for an Autovent?

Autovents are elegant, amazing wax filled pistons that expand when they get warm and contract when they get cold. They are used to automatically open greenhouse windows when they get too hot. I think they could be used in something like a solar tracker or a kinetic sculpture but I've never seen any innovative applications for them. Have you?

Question by snotty   |  last reply


What's something creative to do with my old 4:3 TV set?

I've got an old 26" standard definition TV. Nobody will buy it, and it feels like a waste to throw it out. Any ideas for turning it into something cool? I was thinking of removing the tube and making it into a fish tank or a terrarium...

Question by JGerbs38   |  last reply


Grow a plant in my locker?

Currently, this is an idea, and i am simply expanding on it. I had this great idea, mostly as a joke, why not grow a plant in a spare locker? I am currently a high school student that goes to a small school, and have way too much time on my hands. As i was looking at the empty lockers we have from students who left, or even just spares, an idea hit me. Why not put one of these lockers to good use? Why not put a plant inside of it, that can sustain most if not all of itself? Have a gallon of water in there, along with an arduino and a moisture sensor, that would end up watering the plant. I would also have an artificial light source to provide light, preferably LED. The hardest bit is the power. All of this would run off of either a SLA battery or two, or maybe a drill battery. I could swap the battery once every day, which means it would need to go for 24 hours without stopping. That, and the weekends, which would be three full days. I first thought about mushrooms, or other dark growing plants, but i find that boring, lacking a challenge. besides doing this just for jokes, i have also wanted to try out the idea of growing a plant fully indoors without the use of natural sunlight. I have never done this, so please feel free to bombard me with recommendations. Again, this is only an idea. I can only assume it's possible. Also, recommendations on parts and methods would be sweet. Some type of light that can be powered on 12-24v, and run off of a SLA or maybe even a lawnmower battery for minimum of 3 days. Also, plant. I was thinking a tomato plant? Some species that doesn't grow taller than 2.5ft? Anyway, that's the idea. If you guys could help with ideas, provide recommendations, or point me in the correct direction, that'd be sweet. Last note, i would like to keep this cheap. I am not going for some extreme garden or anything. Just a single plant, in a semi-self sustaining locker.

Topic by RocketPenguin   |  last reply


Energy return on investment for various different energy sources

We're used to thinking about the cost per unit of energy (e.g. $/gallon of gasoline) with the implicit assumption that cost is a rough indicator of what is required to obtain that energy. The Oil Drum has a nice piece on Energy Return on Investment (EROI) and the implications of using low EROI energy sources. To dive right in, it's instructive to think about the EROI of domestic oil production as a function of time:100:1 in 193030:1 in 197011-18:1 in 2000EROI on the Web part 2 of 5, (Provisional Results Summary, Imported Oil, Natural Gas)Energy return on investment, sometimes called EROI and sometimes called EROEI, is thought by many, including myself, to be a critical issue for determining the past, present and future status of human society. It is usually considered in terms of energy return on energy investment, but it can also be considered in terms of energy return on monetary investment. While much of human progress has been attributed, rightfully, to technology, much of that technology has been a means of using more energy for human ends. This is true for fire, knife blades and spear points (energy concentrating devices), the development of agriculture and the increase in its productivity and, essentially all aspects of the industrial revolution.EROI is simply the energy delivered by an energy-obtaining activity compared to the energy required to get it. If the numerator and denominator are expressed in the same units (barrels per barrel, MegaJoules per MegaJoule) the result is a dimensionless ratio, i.e. 100:1 or 10:1). Obviously a higher ratio implies a more desirable fuel than a lower one, other things being equal (which is rarely the case). The concept is extremely simple in theory but often very difficult in execution, mostly because society generally maintains its records in monetary rather than energy terms. Another problem is that the U.S. Government has not supported such studies in a consistent fashion and it is my perception that the quality of some energy records as are kept by e.g. the U.S. Departments of Energy and of Commerce appear to be deteriorating in recent years. Thus deriving the energy cost of getting energy (or most other things) is generally somewhat, and oftentimes exceedingly, difficult. A second problem is that the usual measure of the quantity of a fuel, its heat value, often does not give a full assessment of that fuel's ability to do economic or other work. Most simply electricity and thermal heat from e.g. coal or oil have a great difference in their ability to do work, such as we are willing to trade three or four heat units of coal or oil in a thermal plant for one thermal unit of higher quality electricity. Thus if the input and output fuels are of different quality then it is often thought desirable to weight in some way the inputs and the outputs. A third problem is that it is important to consider boundaries: how large should we draw the boundaries of the energy analysis for the inputs? We will consider these issues in far more detail in later publications but there are many reasons why it is important to make summaries of EROI available at this time even though many uncertainties exist in the numbers that we present here, and indeed with any numbers that might be possible to generate.via jforbess

Topic by ewilhelm   |  last reply


Can a wind turbine be used to heat a greenhouse?

Hello everyone, just a question to get some ideas. My partner wants a year-round greenhouse. We have the greenhouse ready, but need a way to heat it.I've been reading all the wind power ideas, and I think that will be perfect. My questions is:Can a wind turbine be built with a controller that will power a heater in the green house? If the wind stops, the heater would stop. When the wind blows to start the heater (minimum load) the heater would turn on.Any ideas where to start?Thanks,Jeff?

Question by jjmorris100   |  last reply



How to build a heated, around A4 size, greenhouse? ?

It's a around A4 size at the base and i need to know what materials would be suitable.

Question by    |  last reply


I NEED SOME ADVICE ON HOW TO PROTECT MY OPLANTS IN THE WINTER.

I have been collecting materials to build a greenhouse/potting shed. I have alor of hanging baskets , ferns, moss rose, spider plants and tons of planters full of annuals that I have bought for 2 years in a row and I now see that it is not cost effective to keep buying them new year after year....(also bad on my back) I'm not getting any younger here..............I need a place to pot flowers and to keep these from freezing this winter. I have a sliding glass door and 5 windows, so far.  3 are one size and the other two are another. I envision something with the sliding glass door on one end, the 3 windows on one side and the other two on the end opposite the sliding glass door. I think I should use the rippled fiblerglass stuff for the top. How hard is this going to be to frame and could someone give me an extimate of what it might cost me to get it it done. Should I use cinderblock or wood framing and will they live in wouthern Illinois without me heating the shed? kimberlyballard22@yahoo.com

Question by kjballard22   |  last reply


Will this light work to grow plants in my homemade greenhouse? Answered

I am working on a homemade greenhouse and I wanted to use a solar light, I found one for pretty cheap at harbor freight: http://www.harborfreight.com/cpi/ctaf/Displayitem.taf?itemnumber=95573 will this work to help my plants grow? or does it have to be a certain type of light? thanks

Question by davej6694   |  last reply


How can I SIMPLY Construct a Greenhouse with a Dog Kennel, being a female, EASY INSTRUCTION ?

I am trying to start a home business with plants, but really need a greenhouse, since I will be purchasing plugs, which will be delivered in February and need somewhere to store until I can pot them in bigger pots. You have such good suggestions and your input would be appreciated!

Question by bwalke30   |  last reply


off-grid solar/wind powered greenhouse

 Hello DIYers, I am planning on building a simple greenhouse (hoop-house) this spring. The construction will be for an 8'x12'x8'H design. Building this part is wonderfully easy. The hard part is building the off-grid power to supply power to the greenhouse fans and hydroponic pump(s). I'm not sure where to start with the plans.  Here is what I am needing some guidance: Do I build a PV panel then design my electrical needs around that...or vice-versa?? (I have forty 2W solar cells on order) I know i will need batteries...how many 12V batteries do I need? Type? What is the best configuration for the batteries? Should I use a DC hydro pump or AC hydro pump? DC or AC fan for cooling? Future plans include using an arduino to be the main controller.... Please keep in mind that this is a small(ish) hobby greenhouse and I hope to build it to be fully off-grid, at least for the summer months. I have the time to build it, but don't have the know-how for fully designing it (electrical stuff confuses and scares the crap outta me). I'm not against keeping the price low, but am willing to spend a few extra bucks to make sure it's designed right.

Topic by Tweac-it   |  last reply


'Revolutionary' CO2 maps zoom in on greenhouse gas sources

Researchers now have a better view of where carbon dioxide is being emitted thanks to Vulcan, a research project led by Kevin Gurney, an assistant professor at Purdue. This map shows where CO2 is being emitted in the continental United States in 10-kilometer grids and combines data from sources including factories, automobiles on highways and power plants. The map offers more than 100 times the detail of previous inventories of carbon dioxide. The image displays metric tons of carbon per year per grid in a logarithmic base-10 scale.more at Physorg

Topic by ewilhelm   |  last reply



Computers Used to Heat Conservatory

Waste Heat to Be Used by Conservatory ------------------------- Heat generated by the Univ. of Notre Dame’s high-performance computing department is being used to heat a local greenhouse. The department has placed a containerized data center next to the Ella Morris and Muessel-Ellison Botanical Conservatories and Potawatomi Greenhouse in South Bend, Ind. The waste heat generated by working servers is piped into the greenhouse where it is used to keep succulents and other desert plants warm. CleanTechnica.com reports the university is expected to lower its equipment cooling costs by $100,000. The city will save $70,000 it spends to heat the conservatory. The use of the waste heat is part of the Botanical Society of South Bend’s plan to help make the greenhouses self-sufficient due to budget cuts. ------------------------------ Pretty smart. Picture is of my "brain cactus".  

Topic by AngryRedhead   |  last reply


Can convection be used to drive a passive dehumidifier?

Ok, I have a couple of radiators and a greenhouse that is too humid. In winterr can convection drive fluid from a radiator mounted low in the warm greenhouse to a second radiator mounted outside in the cold and then back to create a chilled metal radiator that will have water condense on it and drip into the soil.

Topic by drewgrey   |  last reply


Is corrugated plastic (the type commonly used for signs) a good covering for a greenhouse?

I'm in the planning phase of a greenhouse next spring and I'm wondering if the corrugated plastic that you usually see election signs made of would be good for a greenhouse covering. Has anybody tried this? If so, could you post your results? Here's some information I've come up with already: 1) Corrugated plastic is relatively cheap as dirt compared to glass and corrugated polycarbonate panels marketed under "Palruf" and "Suntuf". 2) There is a greenhouse covering marketed as "Solexx" that appears to be nothing more than corrugated plastic and is claimed to be superior to glass and polycarbonate panels. It's also very very expensive. 3) Solexx panels are claimed to diffuse the light coming into the greenhouse. This is supposed to be better for the plants than direct light from glass or polycarbonate. Below is an excerpt from the Solexx website: "How does light diffusion affect plant growth? Plants create food from light so the type of light they receive is important. Plants exposed to direct light (no diffusion) produce a majority of their food from the top leaves facing the sun. The select leaves absorbing the sun energy do most of the work while the shaded leaves do very little. Direct light also creates excessive heat which causes plant stress. When a plant is immersed in diffused light, all the leaves can photosynthesize resulting in more food production and healthier, fuller plant development. In addition, the upper leaves of the plant receive less intense light which means they will not suffer from plant stress caused by sun burn and excessive transpiration. " Again ,if anyone has tried using corrugated plastic as a covering for a greenhouse could you please share your results? If anyone has their own comment or prediction please share it. If not, I plan on conducting an experiment to test the performance of different greenhouse materials on plant growth. I may have to use artificial light instead of sunlight however, since the growing season here is coming to an end.

Question by EcoMotive   |  last reply


How might I alter a greenhouse paraffin heater to burn more CO2 and less heat, please? Answered

I've built a few things since coming across this site, one of which is a basic hydroponic table for salad greens. I have a paraffin-based greenhouse heater, but I want it to burn with less heat. Do you know if this is possible, please? Alternative suggestions are welcome, with the aim of burning natural fuels to produce CO2. The heat is not needed during these warm days (although it is turning a little colder outside the greenhouse!) I have had a look at 'professional'solutions and they run to about US$500 which is far too much cash. I also checked to see what they did different to a normal burner but other than saying they burn lean they are not helping any further. I'm guessing they burn lean by allowing less oxygen into the fuel/air mix? Thanks for stopping by.

Question by kevinhannan   |  last reply



How to use & wire relays, speed controllers, timers, micro switches, etc. with a DC motor.?

I would like to use a 110 volt, 1/2 hp (more or less), DC ( or AC ) reversing motor to move and close a horizontal, heavy (approx. 200 lbs.) fabric, thermal, curtain blanket and then to move and open back the blanket in a greenhouse. There are very expensive commercial greenhouse systems that exist to perform this task. Since I have a hobby greenhouse that is 30 ft. wide by 80 ft. long by 13 ft. tall, I need a much more affordable system. Horizontal wires or very large monofilament fishing line  (spaced 12" to 18" apart)  will run the length of the greenhouse at approximately the 8 ft. height. These wires or lines will be used to support the blanket and for it to slide on (the blanket will have grommets or similar devices used on a shower curtain to  keep the blanket running straight, etc. ) when mechanically closed and reopened. My idea is to use a DC or AC motor to perform this task with modifications to work in the greenhouse. The motor will consist of the 110 volt, 1/2 hp (more or less), DC or AC reversing motor, that will be connected to a small cable drum spool on the motor shaft, The motor  can be attached at one end wall of the greenhouse at 8 ft. high below or above the blanket and at the other end of the greenhouse also will have a cable drum spool with a pipe for rotation an be appropriately attached to the end wall. Attached to these 2 cable drum spools would be say 175 ft. ( 2 x 80 ft. plus initial amount on spool) of say 3/8 inch aircraft cable. The curtain blanket will have a say a 30 ft. long 1/2 inch or so horizontal metal bar or pipe attached to it on the leading edge. The aircraft cable will be attached to the blanket bar or pipe.The other end of the curtain blanket will be attached to the non motor end wall. As the motor turns the 2 cable drum spools  by wrapping and unwrapping the aircraft cable, the attached curtain blanket will be pulled the 80 ft. length of the greenhouse in each direction. What I want to accomplish is as follows:                                                                                                                                                        . 1. Be able to slowly, if possible, (say over 20 - 30 minutes) close (move forward) the blanket with the motor at a preset time in the evening and for the motor to stop when the blanket is fully pulled to the motor end of the 80 ft. greenhouse. 2. Be able to slowly, if possible, (say over 20 - 30 minutes) reopen (move backward) the blanket with the motor  at a preset time in the morning and for the motor to stop when the blanket is fully pulled back to the non motor end of the 80 ft. greenhouse. To accomplish this, this reversing DC or AC motor will need to reverse direction to reopen the blanket.                                                                                      3. The shaft of a motor will probably be too short to clamp a cable drum spool to. How do I attach the spools?                                                                                         4. What is best to use a DC or AC motor? I tried extensively to research on the internet how to accomplish the above, but everything described similar processes in vague and technical terms of using various types of electromechanical timers, electromechanical relays, limit switches, microcontrollers, MOSFET circuits, transistors, arduinos, bridge rectifiers, etc. I have no  knowledge of all of these electronic devices and am totally confused. However, I am pretty good at say basic home electrical wiring. The closest thing on the internet to what I am trying to accomplish is an automatic chicken coop door, but not enough specifics for my project. I need some very, specific steps, specific products and where they can be purchased to be able to accomplished this. What type of motor, types of electronic devices, etc. Also, since it appears I will need a timer, a speed controller, relays or limit switches, etc. how in the world to  wire these to the motor in laymen terms. Thanks so much for anyone that can help me!!!

Question by woodwardfarms   |  last reply


What plants can/should i use for my steam-punk light bulb terrarium?

I decided to build a light bulb terrarium and took a steam punk spin on it using pipes as the base. What plants can/should i use that will grow up the through pipes(only 2 or 3 inches tall) and still look nice in the bulbs?

Question by HUMUNAHA   |  last reply


My instructables vanished

After I posted 2 new instructables I noticed that my past instructables were deleted.  One was a featured post called "Build a Greenhouse for under $25"  Is there any chance my past postings can be recovered?

Topic by gailgates   |  last reply


PDF from instructable not updated?

Wanted to download my updated greenhouse instructable PDF (new pics with finished decorative roof trims added ca 5 weeks ago), but got the older version. How to get a PDF of the newest version?

Question by BobS   |  last reply


Uses for old and broken projectors/overheads

Our school, for some reason has a lot of partially dismantled and broken projectors. This year, all the classrooms have also been installed with a fancier ceiling-projector that connects to laptops and computers instead of just reflecting pieces of overhead paper. Because it was only recently that the school greenhouse came into use, it's been used as storage. While we could recycle them, I think they could be turned into something useful (preferably for the greenhouse), but I don't have any ideas. I'd like some ideas or for someone to try and build something. The only idea I've had was to turn it into a planter or pot, but apparently the bulbs won't work with plant lights and wouldn't be bright enough.

Topic by Fii   |  last reply