Off-Grid Stealth Cabin Plans

Hi everyone, I just entered my off-grid cabin design in the outdoors contest and I would like to invite you to view it, leave feedback and vote if you like the cabin and off-grid systems. I am a long time off-grid homesteader and I live in a 14x14 solar and wind powered cabin with many off-grid systems of my own design. My contest entry:   https://www.instructables.com/id/Off-Grid-Stealth-Cabin-Plans/ Thanks LaMar

Topic by LaMar Solarcabin 3 years ago  |  last reply 3 years ago


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 9 years ago  |  last reply 8 years ago


OFF GRID POWER Systems MSW invewrters Answered

Hi, Recently I purchase a 5000 watt 60cycle, 24vdc to 220vac inverter (MSW) to run my off grid cottage on, when I received it it had a 2 wire out put. could I conect the inverter 220v out to a 220 to 119/220v transformer  so i  could connect it to my north american house hold elecrical panel?? This would give me the 220v split single phase (full sinewave) similar to hydro power?? Our cottage maximum wattage reguired at any one time we only reguire 12-1500 watts as we have propane stove, fridge, furnass,and hot water. Therefore we only need power for vacum cleaner, washing machine, microwave oven and Led lighting. regards ron

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


Long Range Off the Grid WiFi Repeater

Hello Everyone,  I've got quite the project that I am undertaking and I am looking for a bit of advice. This will be my very 1st forray into long-distance wifi, as well as off-grid power resources, so Im biting off quite a bit at once! I have a friend who has been helping me with the research who has a much firmer understanding of both electricity and hardware, but he will be out of town for the next week and I would like to get a bit of progress on this while he is gone. SO, I shall consult the hive mind known as the internet. Alright, this project consists of creating an uplink between a remote shed, and a home in a nearby city, with a broadband connection. The rub, there is 10,000 ft mountain range in between the two. We have a site were we can put a repeater node at approx. 10,000 ft elevation, that has wonderful line-of-sight to both locations. However, this site is very remote, and will have to run off the grid obviously. The distances are as follows: Home to repeater: 3.96 miles (thats with Google Earth following the contours of the          mountain/valley, not sure how to make it just do a straight angled shot, so thats a rough estimate) Repeater to Remote shed: 2.68 miles (same issue) Background environment info: shed has generator + 60w solar array with 3-4 deep discharge lead RV batteries at 7400 feet. Has spring fed running water, which could be utilized for power as well, as obviously its always running. Repeater location is at 10k, as stated. Moderate to high winds very likely (data from peaks of similar altitude in the general area show gusts ranging from 40-60 mp/h, temperature ranges of  averaging 7 to 90+ for a the later part of July and August (F). Obviously, its very possible to get soemething below this, though the lowest Ive ever seen at the shed has been -15 (f), I would say most winters we could get a few nights that see temps below 0, but not often. Equipment Ideas: So to pull this off, we have come up with two ideas for the network equipment, which I shall discuss 1st, then I will show you what we have come up with for power.  - Network    - Repeater Node: rb433 wireless access point ($99.00) http://www.routerboard.com/pricelist.php?showProduct=43         with 2 r52h mini PCI wifi chips ($59.00 x2) http://www.routerboard.com/pricelist.php?showProduct=69         2 8-18 inch satelite dishs converted for long-range WIFI use (20.00 x2) http://www.engadget.com/2005/11/15/how-to-build-a-wifi-biquad-dish-antenna/ OR instead of a rb433, we could use 2 WRT54G Linksys routers like this. (I also have 2 BEF 801.11b routers that are legacy to the WRT54G. I would like to use this if possible! http://hackaday.com/2005/08/23/how-to-greyhat-wifi-repeater/ Now, I know that this later choice would increase power use by about double. From what I have been able to find, the WRT's would at anywhere from 4.2w to 8w of power. Anyways, I like this later choice because it would be significantly cheaper for the equipment, but do you have any other ideas? I know that the RB433 would work great, but its rather expensive all said and done after I throw up the power as well. Plus, if it takes a lighting strike, its out of commission, and 2 cheap linksys routers are much cheaper to replace! Anyways any input here would be great! - Power  so power to the repeater node is the real challenge. We crunched the numbers and came up with something almost exactly the same as below: From the datasheets, a routerboard will draw between 6-10W. So design for 10W. Over 24 hours you will need 10Wx24h = 240 Watt.Hours of power. For 7 days, you need 7x240Wh = 1680 Watt.Hours. A single, large deep cycle 110Ah 12V battery gives you about 1320 Watt.Hours of power, almost meeting the requirement. Now, to look at the solar panels: A good rule of thumb is to install 6 times the wattage that is drawn by the device. This is because only about 8 hours a day in sunny weather gives you maximum power output from a solar panel. So the other 16 hours you need to draw from the battery. (So already you need 3 times the wattage drawn by the device to break even each day) To generate 1 full day of extra battery power per sunny day, you need another 3 times the wattage. This is how we arrive at 6 times. 6 x 10W = 60W. So at a minimum I would recommend 60W of solar panels. That qoute comes from http://diywifilink.wordpress.com/ and http://mybroadband.co.za/vb/showthread.php?179547-Advice-needed-Setting-up-wifi-repeater-11km which is a project from a guy in South Africa almost exactly the same as the one that we are working on. The numbers came out to be about the same (Though they were a bit different when we calculated for the WRT54G option.) so, 60w of power generation to keep a decent charge on a battery. Now, we have a 60w panel at the shed, which is rather large to take up to 10,000 ft and place on the side of a mountain, and given the consistent wind element up there, we are hoping to do a hybrid system of both solar and wind. This is where things get tricky. A perfect balance, or even a more wind heavy balance would be great, such as 30-40w wind 20-30w solar. That keeps the panel size down, and uses a power source that runs 24/7. A Faroun Savonius wind turbine seems like the best system, but the controller to prevent overcharging etc is where I get nice and lost, having breached into very unknown territory. https://www.instructables.com/id/Faroun-Savonius-Wind-Turbine/ http://www.fieldlines.com/board/index.php/topic,129060.html This looked at 1st like a good, cheap system to use a controller board for the wind, but my question is would the controller board that comes with these solar panels (see below) work for both. That below is the setup that we use more or less at the shed, with some mods, such as a better alternator. http://www.costco.com/Browse/Product.aspx?Prodid=11298029&search;=solar&Mo;=5&cm;_re=1_en-_-Top_Left_Nav-_-Top_search⟨=en-US&Nr;=P_CatalogName:BC&Sp;=S&N;=4001192&whse;=BC&Dx;=mode+matchallpartial&Ntk;=Text_Search&Dr;=P_CatalogName:BC&Ne;=4000000&D;=solar&Ntt;=solar&No;=3&Ntx;=mode+matchallpartial&s;=1&topnav;=&Nty;=1&s;=1 So, can a small, 30-50w wind turbine and generator be built, with a small solar array to power this thing? I dont care if we have some down time, this is primarily going to be used as a system to get a weather station with web cam to send in hourly photos during the peak hours. I can have the system at the shed shutdown automatically  using some cron jobs in linux during the evening to conserve power. When there are people at the shed, we would like to be able to get a good enough wifi connection to use a wifi device (such as an android phone or ipod) to use as a voip phone in essential communication. The teenagers aren't going to be chatting with their friends for hours, but we would like to be able to put a short call through in case something goes wrong, or we just need to get ahold of someone at the shed or in the city. Next the equipment at the shed should be comparable to the repeater node,  sans 1 antenna and just some low power embedded system. We would like to get a webcam and weather station hooked up on this end, but that can wait for upgrades later if needed, if power doesnt allow it. like I said, a simple water turbine could be used (something similar to the wind turbine perhaps?) and even another wind turbine could be built to add extra power dedicated to running any system at the shed, though I dont think the wind is quite regular enough to be viable here, but if its cheap, we could throw it on anyways. equipment at the home in the city is simple, just use an extra laptop or desktop we have laying around to be server/router, hook up antenna to this, broadcast connection, run the weatherstation/webcam web server off of this. So, thats the plan, but load of input is needed to try to come up with this. We hope to try to keep this sub $1000.00, but the budget could go higher. This is DIY at its finest! Thanks in advance for you help!

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


Show Off

Okay, I am totally bored right now SOOOO..... Post all of your time wasting avatars to show off

Topic by Chicken2209 10 years ago  |  last reply 10 years ago


slagging off

How do you get something done about not abiding by the be nice policy

Topic by irontom53 9 years ago  |  last reply 9 years ago


On and Off Switch?

I have a kiln that I need maintained at a certain temperature for an extended period of time (9 hours). Problem is  the kiln I got doesn't maintain its temp, it just constantly supplies heat until it would kill itself. Making me sit there for 9 hours turning it on and off exactly once a min. Obviously this is a problem... there is a physical on and off switch where maybe I can rig up some timer to hit it for me? Otherwise maybe there is a way to modify the wall outlet to supply power 1 min on, 1 min off? Any suggestions would help, thanks :D  http://www.clay-king.com/images/quickfriec.jpg

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


Starting Off

Hey guys, welcome to PVC Maniacs! Okay, I just want to find some stuff out. Just tell me about youself and we can see wo's in this group.

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


Blog off!

If my sixty-seven year old father can do it from Vietnam, then I should be able to. I have a blog. Lightly-populated as yet, suggestions for topics are welcome, but may be ignored.

Topic by Kiteman 9 years ago  |  last reply 9 years ago


Off To College

Greetings fellow iblers! Well, the summer has come to a rapid close, and in 4 days (!!!) I am going to be off to the University of Rhode Island, studying the arts of Mechanical Engineering, Philosophy, and the Spanish language.   First off, I want to thank this awesome community (new members and old) for an awesome 4 year experience.  Despite some drawbacks, this is a community that has greatly matured as mechanical designers, and more importantly, as members of a team, throughout the years, and I am proud to have been a part of it.  Now, although I won't have access to K'nex, I will have access to a computer, to a pencil and paper, and to the resources that will strengthen and broaden my understanding of mechanical functions.  This is not goodbye quite yet.  I will still be very active among the community with comments and plan to continue my "Guide to the next generation of K'nex Guns" as long as I can find the time.  I will also be thinking up new mechanisms and concepts (that's going to be my job in college anyways) and will post designs as much as I can.  And who knows, I might just surprise you guys with something over Christmas break. *hint hint* I am going to try and get instructions up for my improved Kinno-2 within the next couple days.  It now holds 8 shots, has a locking mag release, and will feature a much better bullet mag, so keep an eye out for it. Again, thanks to everybody who has made this such a great experience, and while my methods may change a bit, I will keep working to engineer a stronger community, no matter where I may find myself!

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


Grid snapping in mm

How do you change the snapping of the Move etc. to snap to mm?

Topic by p07gbar 11 years ago  |  last reply 11 years ago


LDR Grid + Smartphone = ?

Hi, I've got an idea but I don't know what it can be used for, yet. Maybe you'll have some ideas for useful applications based on this concept. The idea is to make a grid of LDRs which fits the size of a smartphone/tablet screen, write some code which draws a similar grid on the screen (or just switch images of that grid) so that each LDR will be affected by the light (and color) provided by each cell from the screen.

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


Grid Tied Generator? Answered

So I am planning on hooking up a grid tied inverter and generator, I still need to measure the voltage on the incoming lines, but I assume it is 120 ish so I think that is were I will hook the inverter and then it will go back out through the transformers into the lines, is this right?  Now lets say it is hooked to a wind turbine, will the amperage on the generator vary with the speed while still supplying the right voltage, if not how do I compensate for varying wind speed. We are talking 29 kw generator (it is huge, 16 more than the max on my meter, I will obviously consult the electrical company.

Question by jj.inc 7 years ago  |  last reply 7 years ago


how can I start living off the grid? Answered

What are all the steps that can be taken to live off the grid and still live with all the things I have now?

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


Self sufficient garden idea? possibly off-grid? Answered

I had this idea for a rain barrel + solar timed pump+ drip irrigation system, but was having trouble about the pump itself. I would like the pump to let water drip every couple of hours, for about a week. I have had no such luck finding this item online or otherwise. Any information on such a product, like how to build or where to buy would be enormously helpful!

Question by Nekkyo 6 years ago  |  last reply 6 years ago


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 2 years ago  |  last reply 2 years ago


Help: Pump water into barrel for cheap? (and off-grid)

I'm sort of undecided on the best way to go with a water pumping project and hoping someone had some advice/ideas. The goal: pump water from a small stream into a rain barrel (or IBC tote) in a location with no electricity. It's for having water available for watering fruit trees and doesn't need to pump much volume (even 100 gal/week would be great).  It does have to do it while I'm not around though and I'd like to do it as cheaply as possible. My idea is to make a small diaphragm pump out of pvc (for the housing) and some rubber (for the diaphragm) and a couple check valves.  My inspiration is this guy's pump.  I could drive it with a small DC motor powered by a solar panel.  Maybe install a float switch that turns it off if the barrel gets full. Any other ideas on making a diaphragm pump using cheap or found parts? I've never done anything with solar and would appreciate any advice on components.  What needs to go between the panel and the motor, if anything?  I've heard talk of a "controller" but have no idea what it is or what I'd need...  Also a goal is to design using as low power motors as possible so that I don't have to spend much on panels. I've also played around with the idea of something wind powered, like this thing (but cruder, presumably).  And had this other crazy idea to make a bellows-style pump for a windmill using a toilet plunger. Anyway, any thoughts and ideas are appreciated!

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


off-grid, affordable, and open-source shipping container house

Howdy,  I've launched a kickstarter to build an affordable, off-grid, and open-source shipping container house:  http://www.kickstarter.com/projects/1868967872/shipping-container-to-off-grid-house-conversion . Any feedback would be appreciated; thanks!

Topic by liseman 7 years ago  |  last reply 1 year ago


How to power IoT devices with a 12v DC source (Like a Solar Power Kit without the Inverter)?

Hello,Iam a novice in electronics but have a passion for tinkering with IoT (Internet of Things) devices and other electronics projects, I have a system setup in my farm that uses the following devices,Raspberry pi 2 (5 Volts 2 amps)Wifi Modem (12 Volts 1.5 amps)3.5inch 250GB Hard disk for data logging (12 Volts 1.5 amps)I plan to use the system to monitor and control the water flow to some of the crops in our farm using soil moisture sensors, solenoid valves and flow sensors.The issue is that the system needs to run 24/7 and is located in a remote rural area where power cuts are frequent. I need to run these devices on a solar power solution so that they can stay off-grid (for power).My question is whether it is possible to power the devices off the DC power that is generated from a Solar power system (Solar panels, some batteries and a charge controller) without the need for an inverter.My reasoning is that the inverter converts the 12v power from a solar panel and batteries into 240v AC power and the DC wall-warts (DC power plugs for devices) convert the 240v AC power back into 12v or 5v for the respective devices. This conversion causes inefficiencies in the solar power system thus losing energy that can be better utilised.Note: We use 240v AC standard in India (in the US they use 120v AC standard), I plan to use a DC-DC Step down regulator to power the raspberry pi 2 off the 12v power provided by the solar power system and other similar regulators boards to power the wifi modem and the hard disk.

Question by arunprasathmba11 1 year ago  |  last reply 1 year ago



im off to school!

Im off to school, see you later.

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


Arduino On/off button? Answered

Hey so I had a question. Can somebody post some code of how to make an LED come on when you press a button and stay on, then once you press the button again it goes off and stays off until you press the button again? Thanks!

Question by HavocRC 6 years ago  |  last reply 3 years ago


Unexpected log off?

My subscription was just  renewed.  when I tried to download "Binocular parallelogram mount" I get logged off .  I am unable to download this project.  How come?  Thanks.

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


Pictures cut off

I started writing a new Instructable and noticed that when I use the preview function the pictures are cut off and therefore weirdly off centre. For some of the pictures it doesn't really matter, but some like I said look weird (as shown in the pictures). I don't see why there is a need to cut the pictures. Is this just an error and will it look better once the instructables is published?

Topic by BrittLiv 1 year ago  |  last reply 4 months ago


On-off swict for LEDs?

I'm going to install an LED bank into a stereo cabinet. Powered by a standard 120VAC power supply, I want to put in a simply on/off swicth. I can solder but know little about electronics. Can I use a simple toggle? The PS output is 12 V (I assume DC).

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


$100 off Glowforge

Glowforge is giving Instructables members $100 off their new line of 3D laser printers! Pick one up today by following the link below to access the discount! Offer valid through October 28th and will be automatically applied when you click the link. GLOWFORGE DISCOUNT

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


Tomorrow off school?

First of all, I know this isn't knex related. Get over it. This is like the most popular section on ibles, and I mainly interact with the people who check here. Anywho, I was just wondering... Does everyone have the day off from school tomorrow? (Veterans day... 11/11/09) If so, what will you be doing?

Topic by travw 9 years ago  |  last reply 9 years ago


Temporary Log Off?

Hello, It seems that every time I try to view this (and ONLY this) instructable, my account is temporarily logged off, leaving me unable to comment, rate, or even favorite the post. (and it's a great share too, just what I was looking for!) I've notified the author of this as well, who also seems to be having trouble with their image tags. Could anybody please look into this? I'd hate for such a useful post to die in obscurity. Thank you... -rhoddity [link] https://www.instructables.com/id/Custom-Switch-Panel-for-a-Flight-Simulator/

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


Knock-off of minecraft Answered

Ok so I am having problems with minecraft so I need your help is there a game LIKE minecraft wich runs on the 3D engines Unity or Java where you can mine and bulid and you have to deafeat hostiles <--- (not needed) and it is a free roam and it HAS TO be free Just give me something like minecraft and is 3D and ill take it

Question by Atlas Portal 2 7 years ago  |  last reply 5 years ago


Printer rip off

Hi, does anyone know how to reset a Samsung C460W printer as I am getting a message to replace the fuser and the transfer belt, the printer has been operating fine up to this point, cheers, Ian

Topic by IanD15 3 years ago  |  last reply 3 years ago


Fend off Impetigo?

 Well, it turns out my girlfriend has Impetigo and I fear I have caught it from her. Is it possible to minimise damage or stop it during its 1-3 day incubation period? Any advice wanted.

Question by DELETED_zoltzerino 9 years ago


I'm bunking off!

Goodbye, peeps! Plans have changed slightly for Christmas, so I probably won't be near a broadband connection very often, if at all, until the New Year, just in time for my second anniversary as an Instructableer. In the mean time, Happy Holidays, Merry Christmas, Happy Hanukkah, enjoy the Solstice and the New Year and any other holidays I've missed.

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


LED on/off switch? Answered

I'm looking for an instructable that would point me in the direction of how to make an led red/green light for when my roomate is allowed to come in (Socks are no longer working)

Question by JustinH16 3 years ago  |  last reply 3 years ago


December beard-off!

January 2012   Sculpted! Thanks to everyone who joined in the fun and shared their real and faux beards in the comments below! It was fun to see all the different variations and everyone who posted will be sent out a pack of Sugru! Here's the results of our in-house beard-off: frenzy went for the Deron Williams fade kazmataz had the classic milk-moustache  mikeasaurus and StumpChunkman did mirrored MonkeyTail's  lamedust went all out with the technicolour rainbow Way to go everyone! December, 2011 November saw many men grow moustaches in support of prostate cancer awareness. For December a few of us at the lab are going to keep the facial fur tradition alive and attempt a beard-off! For the next few weeks we're tossing out the razors and documenting the madness! After, we'll sculpt them into weird designs and then post the results and let you decide who you think has the best/worst beard. This beard-off isn't just for the gentlemen either, the ladies of Instructables have also volunteered to participate with faux beards, knitted beards, or anything else! We're starting with how we look now, then updating later in the month with how our beards are progressing, then how they look sculpted in a ridiculous way. Here are the Instructables staff participating: Participant  | Start (December-Beginning) |   Beardy  (December-End)   |    Sculpted (January 2012)     frenzy kazmataz N/A mikeasaurus StumpChunkman lamedust X Members can join in the fun by posting pictures of their crazy beards in the comments below. Every member who posts a picture of their beard (real or fake) will be sent out a single Sugru pack and an Instructables sticker! Hurry, these things are itchy and are going to be shaved by January 2012!

Topic by mikeasaurus 7 years ago  |  last reply 6 years ago


I'm off for the night!

Kitewife has just handed me a shiny new copy of Unseen Academicals, by The Man Himself.Back in a few hours...UPDATEI'm back, and here is my favourite passage, which I can also post with spoiling anything:[He] took a sip of his beer. 'I have told this to few people, gentlemen, and I suspect never will again, but one day when I was a young boy on holiday ... I was walking along the bank of a stream when I saw a mother otter with her cubs. A very endearing sight, I am sure you will agree, and even as I watched, the mother otter divd into the water and came up with a plump salmon, which she subdued and dragged on to a half-submerged log. As she ate it, while of course it was still alive, the body split and I remember to this day the sweet pinkness of its roes as they spilled out, much to the delight of the baby otters who scrambled over themselves to feed on the delicacy. One of nature's wonders, gentlemen: mother and children dining on mother and children. And that's when I first learned about evil. It is built into the very nature of the universe. Every world spins in pain. If there is any kind of supreme being, I told myself, it is up to all of us to become his moral superior'.

Topic by Kiteman 9 years ago  |  last reply 9 years ago


Hoverbike takes off

Australian Christopher Malloy has built what seems to be a working hoverbike.  Built in his Sydney garage, with a custom carbon-fibre frame and a BMW engine, the machine is being touted as "Star Wars Speeder bike Mk1". Currently restricted to tethered flights of a few inches altitude, Malloy claims the bike feels stable, and is just waiting permission to undertake untethered tests. 'I am still ground testing at the moment only because I'm not 100 per cent sure what will happen so the straps are there to cover the unknown. I haven't had the pleasure of flying round the countryside yet. 'It is quite stable and doesn't want to tip over but if something unplanned happened during testing I wouldn't want to break the prototype. 'The Hoverbike was built with safety in mind so at least three components have to fail before you might have a serious airborne failure. 'There are also two explosive parachutes attached to the airframe and of course the rider could choose to wear their own parachute too. He predicts: 10,000ft altitude. 100mph 92 mile, 45 minute flight on one tank £45,000 pricetag The hoverbike should also have "ultralight" status - at only 270kg, under US regulations, no pilot's license would be required.  Since it has no driven wheels, it shouldn't require a road license either...!  Malloy is a former helicopter pilot, and says those skills are helpful when flying the hoverbike, but also says that the unique craft ultimately needs no more skill to fly than a motorbike, with speed and direction being controlled by a mixture of throttle and body-posture. As soon as I win the Lottery, I know who is going to get a knock at the door... Via Daily Mail

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


grid tied bicycle generator

2 questions about grid tied bicycle generators: 1/ will they feed into the grid if voltage is lower than the grid voltage? 2/ could you connect several bikes to one inverter to feed into the grid? thanks?

Question by gouldy 9 years ago  |  last reply 7 years ago


what is hybrid electricity grid?

How to synchronize solar and wind energy?

Question by 9 years ago  |  last reply 9 years ago


Grid Tie and Induction Motors

Yes, I know it's nearly 3am on the east coast... but and idea struck me. So the idea is to feed small amounts of mechanical power into the power grid. Not necessarily run the meter backwards, but supplement power consumption.I've researched grid tie inverters - which are very expensive. For those wondering, a grid tie inverter is feeds mains power back into the grid by syncing phase angle and phase (no dead shorts :) ) and applying slightly higher voltage. They are very efficient and really not within a college student experiment budget :pSo I was thinking... Rather than go from mechanical to DC to AC to grid - go from mechanical to AC to grid VIA an induction motor. As a proof of concept, use a DC motor + battery to turn an induction motor. Plugged into the grid, in theory, should apply current. Oh, but the phase you say? How do you prevent a dead short?"I've thought of this -- before applying mechanical power - have the grid bring the induction motor up to speed. Then try to turn faster (apply a torque) with the DC motor, for example. In theory, the amount of extra power put into the grid will be related to the slip angle of the motor - which will also control the speed of the input (so you can't go over speed by too much).Keep in mind that this whole battery business is just a proof of concept sort of thing - I'm not talking perpetual motion or any hohaa craziness. In the end, the final mechanical input will be around 200 watts. I expect this to be very low efficiency (likely 50%ish), 100W isn't an answer to the energy issues - but it's an experiment. It's also not going to come even close to driving the meter backwards, but it should run (as supplement) my laptop + two to three 13w CFL's :DI think the theory is feasible -- the inspiration comes from flywheel driven UPS systems. An induction motor is driven while mains power is on to keep a flywheel in motion. When the power goes out, the FW drives the motor and feeds to local grid.I'm thinking of using a "low" rpm induction motor.... If I recall, ceiling fans are 16 pole? So that's 60Hz2*2/16=450rpm... Add ceiling fan motor to the list of things to hunt for :) Looking at the one above my head, it looks like it even has a nice bolt pattern for some sort of pulley shenanigans :DCan someone either throw some ice water on me and slap me for being an idiot -- or let me know if I've found a boat to Valhalla.Oh, and my apologies for dancing around the "mechanical input" details.... There's a reason for this, I promise :) In any case, insight and information is appreciated :)

Topic by trebuchet03 11 years ago  |  last reply 7 years ago


battery operated dehumidifier ?

Question by john53 7 years ago  |  last reply 7 years ago


Can you attach a micro inverter after a ups to stop feeding back into the grid ?

I have a couple off ups set up so that they use solar to charge a battery bank and use that power before switching onto the grid (basically in reverse to how they should work). now id like to take some off the load off the inverter and use micro inverters to add to my inverter however i am not allowed to feed into the grid so if i attach the the micro-inverter after the ups would it feed into the grid when the ups is in grid mode or would it only power devices attached to the ups ?

Question by Kieren-J 1 year ago  |  last reply 1 year ago


off-grid home lighting from solar panel and 12v battery?

I ran 3 parallel circuits DC all hooked to a circuit going to battery. each circuit had a 5w and a 3w high-powered LED and a 2w resistor. I spaced the led's about 4 feet apart in each circuit and the lighting was spectacular. lit up 300+ sq. ft. with 6 led's. then one of the 5w led's flickered, turned blue, and dimmed permanently.  I don't know what I did wrong. I thought led's would only use power available. the guy at superbright led wanted to sell me a $20 direct current driver for each light, which would make the cost 50 times higher. he said my math was ok and it should work. each light had it's own heat sink. any help greatfully appreciated

Question by johnsurvey 6 years ago  |  last reply 6 years ago


Gas furnace plugged into 120V solar/wind generated power bypasses the thermostat control and starts immediately. Why?

The sine wave generated by my 12v to 120v inverter scopes even better than the grid current.  All other appliances function normally on off-grid power.

Question by Twicewidowed 8 years ago  |  last reply 6 years ago


Fade LEDs on and off when the power is switched on and off

Hi, I'm still a complete novice when it comes to electronics so I was wondering if anyone here would be able to help. I'm rigging up some LED lighting for my aquarium which is set to switch on and off with timers on the mains supply to the house. The timers switch on/off the power transformers which supply the LED lights. I would love to find a way so that when the power comes on the lights fade on and when it goes out they fade out, would be nice if it was a long fade too, maybe 15-30 minutes, ideally 30 mins to an hour. I am guessing there would have to be some pretty big capacitors involved to that would fill up, increasing the brightness as they goe, when the power comes on and slowly discharge as the power switches off. Another thing to note is that I am using 2 different LED systems. The blue LEDs are using standard LEDs that are sold in blocks (3 LEDs per block, I'm using 3 blocks, so 9 LEDs total) and are designed to run on 12v. I am currently running them on 6v as they are pretty bright, but if the circuity could have them fade over an hour I would like to put them up to the full 12v.  The white LEDs are 4 of 3w luexon star type LEDs that are running in serial. The system goes mains > 12v transformer > 3w LED Driver > LEDs. Here is a link to the driver I'm using http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item;=250752711282&ssPageName;=STRK:MEWNX:IT I assume that the fade device would have to go between the driver and the LEDs? Thanks for any help you can give me. Darren

Topic by d77uk 8 years ago  |  last reply 8 years ago


What's the most efficient way to build a new small home in a midwestern climate? Can a laymen really pull this off?

I'd like to build as green and as efficiently as possible, most likely building it off-grid, and incorporating a composting toilet (clivus multrum style), and energystar appliances.

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


45 WATT Towel Rail - would there be any way to power this off grid?

Was thinking that perhaps, because of it's low wattage that perhaps there might be a way of powering thing so that dry towels might be possible if the central heating wasn't on. BUT I'm not an electricity guru so help required!!  :))

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


Scottish Island Stays off Grid - replaces diesels with 95% Green resources.

The Scottish island of Eigg (pronounced "Egg") has never had mains electricity, and has had to rely in expensive diesel generators for the power they do use.Devices that require 24/7 supplies, such as fridges, have been an unknown luxury.Today, though, that all changes:A renewable energy supply giving the Isle of Eigg power 24-hours-a-day has come online for the first time.The £1.6m system for the island in the Small Isles between Skye and the Ardnamurchan peninsula uses a mix of hydro, wind and solar power.It has been designed to generate more than 95% of Eigg's annual energy demand and is backed up by a battery storage system and two diesel generators.Residents have previously relied on diesel generators and hydro schemes.The dream of green power has taken 10 years to realise. A total of 45 households, 20 businesses and six community buildings on the island are linked together by six miles of buried cable that forms a high voltage network.The whole project was organised by the community themselves - at the switch-on ceremony (in the local tea shop), the island's children gathered round a candle-lit map of the island and blew the candles out as the power came on.Before the switch-on:homes were powered by diesel, wind or hydro-generatorselectricity was unreliable and restricted to certain hourssome residents went without washing machines and vacuum cleanersthe noise from the generators could be heard for milesDiesel was delivered by boat but services sometimes cancelledBBC News storyBBC Magazine article, with comments.

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


Grid Capacitors or Other Surplus Caps?

I am looking for some extremely powerful capacitors, I know that you can buy old grid transformers and I wondered if there was some kind of capacitor they use one the grid which could also be available.  If not, what industry would have old capacitors cheap that still work, I'm looking around 300 volts 1 Farad or more 

Question by jj.inc 6 years ago  |  last reply 6 years ago


Switch buying confusion. What is the difference between On - Off - On and (On) - Off - On? Answered

I am having some trouble buying switches from mouser. I need a toggle SPDT switch that has an On - On (on a different line) type workings (like seen here under SPDT). The problem is Mouser has so many different options in their "switch function" filter. Which one(s) should I use? What do the Parentheses mean? Does it mean Momentary or Something else? What about the "None" seen in a few options? What's up with "MOM"? Here is a link to the page I'm talking about.

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


How to limit A/C current draw from gird and draw power from secondary grid tied solar inverter ?

Micro grid tie inverters are an excellent power source and can be linked together to generate energy, however they do not function when grid is down, this is for the safety of line workers. In a real world scenario I want to ensure that all power is drawn from the energy produced by the micro solar inverters as the primary source while it can produce power and not from the grid which will act as a secondary power source, this will require some sort of current limiting solution from the grid without reducing the voltage to keep the inverter working.   For the safety of line workers I would like to have an automatic transfer switch which will have both the primary power source from grid and a tertiary inverter backed battery backup so that when the grid is off, the power is drawn from the Inverter and there is no power fed back into the line keeping lineworkers safe and since pure sine wave produced by the inverter can activate the grid-tie inverters and it should theoretically increase the VA of the UPS to the size of the installed Grid-tie micro inverter capacity, the automatic transfer switch should take care of switching between grid when power is on and to the backup inverter when power is off.  TIA for any advice in this regard !

Topic by Ruben GeradM 2 years ago  |  last reply 2 years ago