electric motors

I am considering motorizing my bike for my work commute. However I don't have enough knowledge about motor output as in torque / rpms to be able to determine what kind of characteristic I should be looking for. For many of the electric motors I am finding online, it doesn't really say the torque output. Is there a spec such as watts that I can judge a motor by? What specs should I be looking for in a motor that can assist in moving my weight. Or an links to good knowledge sites would be great too. Thanks.

Posted by aeneas shrike 10 years ago  |  last reply 9 years ago


Electric didgeridoo

Bored with traditional digeridoos, Kyle Evans made this electronically modified, Bluetooth PVC didgeridoo. The Bluetooth allows him to not be tethered to a computer and the controls on the sides allow him to modify the sounds in the middle of a performance. It takes a lot of breath to power the 4.5 foot didgeridoo, but with a feedback feature he can keep the sound going and catch a breath, which is a little easier than the typical circular breathing. This took 3 months for him to build at a cost of $300. You can hear a sample of it in action here. You Built What?! The Electronic Didgeridoo

Posted by fungus amungus 8 years ago  |  last reply 8 years ago


Electrical excitement (not)

I was going to fry some potatoes, but my electrical ring failed with arcing, smoke, noise & sparks... I'm not happy. I've got the ring to replace, a pan, and I've got sooty-oil to clean up. And no fried-food. And the place stinks of burned-oil. And I've lost / spoiled half a bottle of fresh oil. Oh, and I'll have to pay for the electricity that did this too. And I need some 30A fuse wire.

Posted by lemonie 9 years ago  |  last reply 9 years ago


electric bicycle

Ok, i wanna take a old bike and put an electric motor on it, with a solar charged battery. what i wanna know is, what are my options on motors if i wanna use recycled components? can i use a motor from a; washer, dryer, blower fan, ect? i would like to be able to have something i can get around town with(not assisted)

Posted by golddigger1559 7 years ago  |  last reply 7 years ago


Wireless Electricity!

I'm playing around with the idea of wireless power. It should be easily do-able over a short distance- my plan is to be able to charge something like my cellphone through induction, by placing it on a powered surface.. But- I don't know a whole lot about induction, so I was hoping someone could help me out a bit. Here is my setup: I'm using coils from old 5 1/2" floppy drives. I used them once before in a BEAM bot pendulum.. I set one coil on top of another. So far, by pulsing 9v DC through the coil, It sparks a little (because its shorting I assume) and the multimeter in the adjacent coil gives me a small spike of voltage, but quickly returns to zero. Zapping repeatedly gives me at best 2.5v, which is totally acceptable, if only it was sustainable. I've tried using AC 9v.. but I didn't seem to work either. I also tried some different on/off cycles with a BS2.. no luck. Any info would be quite appreciated..

Posted by sam 11 years ago  |  last reply 10 years ago


electric shaver ideas? Answered

I have an electric shaver but the battery recently burned out, any ideas for what i can do with it or the parts?

Asked by embochner 6 years ago  |  last reply 6 years ago


seized electric motor

I'm trying to fix a dishwasher. The pump motor seems to be seized. It doesn't __feel___ that stuck, and has spun for me 1 out of 5 times. Any ideas on how to fix it?

Posted by Toga_Dan 6 years ago  |  last reply 6 years ago


Electric muscle stimulator

As part of my therapy for a painful shoulder dislocation I receive electrical muscle stimulation on my shoulder. I wonder if someone knows how to safely build a home made one.

Posted by blkhawk 6 years ago  |  last reply 6 years ago


Build an Electric Car

Want to convert your car to all-electric on the cheap?  Check out bennelson's awesome Instructable, Build your own Electric Car!  Ben walks you through the steps of converting a Geo Metro (purchase price $500, gas-requiring parts sold for $550) to run on a forklift motor and 6 12V batteries.   According to his calculations, the car gets the equivalent of about 130 mpg.  Not bad for an entirely self-taught mechanic! Check out the video of his converted Metro going up hills: Sounds easy, right?  So when are you planning to convert your car or truck? This post has been sponsored by Pepsi. The Pepsi Refresh Project celebrates the people, businesses, and non-profits with ideas that will have a positive effect on our world.

Posted by canida 8 years ago  |  last reply 7 years ago


Electric Arc Furnace?

I'm trying to make a furnace that can melt metal.  I've done a lot of thinking on it, and I decided that I'm going to make an Electric arc furnace for a multitude of reasons. I plan to use an arc welder as the power supply, with two carbon rods as the electrodes, creating an arc just above the crucible to melt the metal. I was wondering if anyone has done anything like this before?  I plan to have the furnace body made out of firebrick and refractory cement. Would this pose any problems? Also, how much strain does this put on a welder? Will it need to be shut off after a while due to overheating, or can it sustain it's own? Finally, How much power does a typical arc welder use? (in terms of watts) 

Asked by tylervitale 7 years ago  |  last reply 3 years ago


FAST electric cars.....

Would you believe, electric cars that are winning against their gas guzzling cousins? ...drag racers are enabling small electric vehicles to beat gasoline-powered Corvettes and VipersCharles J. Murray, Senior Technical Editor -- Design News, May 25, 2009Drag racing Electric Cars

Posted by Goodhart 9 years ago  |  last reply 9 years ago


ELECTRICAL COMPONENTS NEEDED

I need help with few things and the main one is that i need some electrical components which are not available in my locality.If anyone living in india is ready to help me i will  be very thankful.

Posted by pranjal12 6 years ago  |  last reply 6 years ago


Convert magnetic to electrical? Answered

I am trying to find a practical way to build a device to convert magnetic energy into electrical energy, some kind of generator or other device, there are several ways in which this might work in theory but actually building the device would be more difficult to figure out.

Asked by thedriftcore 6 years ago  |  last reply 1 year ago


Electricity over IP

This is not really a new concept (first published in 2002), but one to mull over :-) Electricity over IP (EoIP, pronounced "yoyp") is a proposed scheme for delivering electric power via IP (Internet protocol). EoIP was developed to eliminate the unnecessary redundancy inherent in maintaining separate distribution networks for electricity and the Internet. The technology could be especially beneficial in remote areas with Internet kiosks but without electricity.The architecture for delivering EoIP is known as MPLampS (Mostly Pointless Lamp Switching). Electricity is digitized and encapsulated in discrete packets. According to the IETF's marketing segment, "MPLampS has the potential to dramatically lower the price, ease the distribution and usage, and improve the manageability of delivering electricity." Electricity over IPThe IETF Network Working Group described EoIP in RFC 3251, published on April 1, 2002. April 1 is also sometimes known as "April Fools' Day."

Posted by Goodhart 10 years ago  |  last reply 9 years ago


Electric Motorcycle batteries

Hi, I have an electric e-motorcycle (Road Runner -several years old) and I need to get new batteries ASAP. Inside it has 2 rechargeable batteries. Does that mean I need to get 2 - 12V batteries, whatever Watts I like, based on however much horsepower I need.

Posted by MielV 1 year ago  |  last reply 1 year ago


Looking for Electrical Engineer

The company I work for is looking for a full-time in-house creative EE. We design products for commercial and consumer applications.Here is our website:Griswold EngineeringWe need one innovative Electrical Engineer with experience programming electronics, as well as designing boards and circuits.Metro-Detroit area.Contact me if interested.

Posted by whiteoakart 9 years ago  |  last reply 9 years ago


Electrical Engineering Schools

I want to go to a good electrical engineering college. I've been looking at schools like Georgia Tech, and University of Michigan Ann Arbor. I'm leaning toward Georgia Tech, but which college would be the best. My Reach is MIT, considering my scores are high enough. So if I magically get accepted to all electrical engineering colleges, which should I go to?   My potential college list: Boston U Bucknell U Carnegie Mellon U Cornell U Franklin W Olin C En Georgia Tech MIT Miami U Oxford Penn State U Park Polytechnic I of NYU Rensselaer Polytec I Stanford U U Calif Berkeley U Illinois Urbana U Michigan Villanova U Virginia Tech All offer Electrical engineering and rank in the Top 100 based on various US surveys and ranking list for Graduate Education 

Posted by monkhm 7 years ago  |  last reply 7 years ago


Lego Electricity Generator

Now i was cleaning up my room and found this lego generator. So i opened up the lego block and got the generator.I don't know any of the specs for it, and don't have a multimeter or something handy to test the out put.I assume the black thing is the capacitor, it has this written on it:15BC437Some is hidden against the casing of the generator.What's the point of the magnet i move around in the video?Well aswell as helping me with that is there anything i could use this for?Video:Pictures:(Which is side is + and - ?)

Posted by inevitable_chaos 11 years ago  |  last reply 11 years ago


Why electric arc are blue? Answered

I was wondering why electric arc are usually blue when there is a short.

Asked by Sarah86 8 years ago  |  last reply 4 years ago


A home made electric shocker?

Asked by Gmendez2012 6 years ago  |  last reply 6 years ago


Slowing down an electric motor? Answered

I am on radio shacks website looking at a 1.5-3VCD hobby motor.   The specs say up to 8,300 RPM at no load.   If I added resistors to this, would it slow it down?  I want it very slow, like 1 rotation every 3 seconds. lol   Thanks

Asked by pennsteve 9 years ago  |  last reply 7 years ago


strength specs for electric conduit

Does any one know strength specs for electric conduit? as some of you have read in my previous posts, i plan on making a hammock stand and it needs to hold at least 170 lbs to be on the safe side (i plan on gaining weight during this jolly Christmas season). i have the design below so if anyone can put in some constructive input that would be great. I am thinking about going with either 1" or 3/4" EMT. if there are other metal tubes that are stronger but also relatively cheap please let me know. Thank you for your help and patience on my re-posts of the same topic.

Posted by srikar06 11 years ago  |  last reply 11 years ago


battery for an electric go kart?

hello, I'm planning on taking a box fan motor and attaching it to a frame. what kind of battery should i use and what should the circuit include? thanks SC

Posted by sc lightning 8 years ago  |  last reply 5 years ago


Increase the speed of an electric motor? Answered

My electric bike, seen here, was built for my senior project. I was limited on motor choice, and had to go with the best I had, an old powerchair motor. After 2 successfull attempts at building an electric bike, I have discovered that it is impossible to go faster that 25 mph with with one of these motors. As you can see on my instructable the bike has 6 speeds, with a top speed of 20mph in first gear. however, when I shift gears, the motor rpm's decrease instead of the speed increasing. I have heard before that it is possible to run an electric motor at higher voltages than it is rated, so I was wondering, if i could add a seperate switch and a "booster battery" of sorts, that as long as I monitered the voltage so as to not let exceed 24 volts, if this would be feasible. My only other option would be to add a second motor in parallel with the first, and on the same drive belt. The first option would be the easiest, if it could work without damaging the motor. Any help would be appreciated. Thanks, iloveairsoftstuff

Asked by the mechanical engineer 7 years ago  |  last reply 7 years ago


Homemade electric nail file

Hey there to all you wonderful people! I have an odd proposal / suggestion / idea... I was wondering if anyone had ever considered this as an Instructables project by any (small) chance? Don't laugh TOO much, this is not something that would be considered a run-of-the-mill every-day kind of DIY by any means... Here's my ish: I'm not incredibly fantastic when it comes to personal grooming, doing the basics as quickly as possible so as to waste as little time getting ready for the day. However, me tooties are a point of some concern due to an out-of-the-ordinary dermal condition. As a result of this, I have to take special attention to moisturizing feet and toenail filing. Also, I suffered an accident when I was much younger that caused the nails on the big toe to grow skew. Long story short I've now been sitting on the floor for 40 minutes with a manual file and, while my one's and two's a looking smashing, I thought there MUST be a way of making my own electric nail file. I thought to try and convert a screwdriver bit for my electric screwdriver into a spherical file which I'm sure would literally save me HOURS and will do my knees a world of good - I've found myself kneeling in 1 position for a lot longer than nature intended. I am NOT the shining Instructables Star in the making by ANY stretch of the imagination but I do have some interesting theories about time travel (not really applicable here, but I wanted to try and sound less daaa - cos this isn't a 'Change The World' kinda project) In any event, I thought maybe someone who has a grasp of my concept and an understanding of how things worked may have a thought on how to accomplish this? Baring in mind that where I live, things like electric nail files are luxuries available only to a specific  social group & not an option for the general norm pavements specials such as I... I'm so interested to see if anyone could give me some help. You'd LITERALLY be saving my life (or at least adding about 10 - 15 years to it where I don't have to spend crouched over a small chair for a quarter of my day every 5 or 6 days) Stopped giggling yet? :) Tx guys, it's a dumb thing to ask, but this dumb thing has the potential to SIGNIFICANTLY change my life in a very practical way. Kind Regards and Loads of thanks! ps It ses to add images, but I think just for the sake of global sanity I'll refrain until I've found a working solution (or a pic of someone else's feet) :) Much love t'ya!

Posted by nixusinc 2 years ago  |  last reply 2 years ago


Electric Air Conditioner for SUV??

I live and work in one of the southern states that moves to a position approximately 100' from the surface of the sun in summer.  I unfortunately must spend time sitting and waiting at various facilities, sometimes for a couple of hours in my vehicle.  I have 120VAC readily available at all of the facilities, but usually no air conditioning inside.  I'd like to find a way to cool the inside of the vehicle without idling the engine.  Ice would not be a preferable solution.  Ideally, I would like something that can be put into the vehicle during the summer months and then removed during the cooler month we get.  I've thought about a rooftop A/C, but don't want to cut holes in the vehicle (I also don't like the look. It's a Suburban, not a camper!).  A portable A/C with the vent hose run out of a window would be one option, but I was hoping to find a more elegant solution...and one that challenged my technical abilities. :)  It's been in the 105 degree plus range this week, with no forecast for it to go below 100.  I want/need something that travels with me, sits in the cargo area of the SUV, and can (hopefully) just be plugged in to work.  It would NOT be used while the vehicle is moving.   Oh, and of course....I want to do this as inexpensively as possible! :)

Asked by abideejay 6 years ago  |  last reply 1 year ago


Electrical Engineering Project Suggestions

Kindly Suggests Electrical engineering projects for second semester of Undergraduate.

Posted by Ali khann 4 years ago  |  last reply 4 years ago


where does electricity go?

I got a question. If we ground everything to the Earth for shorts and things like that, Where does that electricity go to? Does it just disappear deep down inside the earth? Does GE have an electrical well and is sucking all this electricity that people pour onto the ground? Please dont use big words like anode and cathode and coulombs (simple is better) :)

Posted by thematthatter 10 years ago  |  last reply 3 years ago


Electric typewriter to USB keyboard

Is there an instructable that is basically universal that show how to convert and electric typewriter to a USB keyboard?

Posted by metalshiflet 4 years ago  |  last reply 4 years ago


ceramic tiles and electrical outlets?

I'm installing ceramic tile as a backsplash in our kitchen.  My problem is my electric outlets. How do I make these flush or even with the tiles?  Thanks you, Stumped Mom!

Asked by doobiedoobie57 7 years ago  |  last reply 7 years ago


Up-cycle an electric blanket? Answered

Our non-woven electric blanket has become unreliable and has been retired.    Is there anything useful I can do with the cords or blanket itself?  It's a lot of bulk to put in the trash.  The wires in the blanket make it undesirable as a regular blanket or quilt lining. 

Asked by mole1 7 years ago  |  last reply 7 years ago


Make electricity from trash!

Hey, guys! recently I've published my FIRST instructable! It's a project to make electricity from biogas produced from organic materials. Check the link below to have more information: https://www.instructables.com/id/Cash-from-Trash-Make-your-very-own-electricity/ Note: this instructable is in the "green living and technology challenge" so if you like it vote for me!

Posted by baker amin 7 years ago  |  last reply 7 years ago


find old electric wheelchair?

I would like to find a electric wheelchair/electric wheelchair motors to make a RC snow plow for one of my disabled friends. any ideas of where i could get one dirt cheap \ free round the northern MD area. any ideas would be greatly appreciated.

Asked by bigbodysmallbrain 6 years ago  |  last reply 6 years ago


Mechanical vs Electrical Engineering? Answered

What are the primary differences between the two? Which is a more rewarding career path? Which major is better for someone who wants to get a broad understanding of engineering? Is it feasible to get a double major?

Asked by Chikpeas Brother 4 years ago  |  last reply 2 years ago


Electric motor running backwards

I have an electric motor on a large Hobart vertical mixer 80 quart.I had the brushes replaced and put it back together It now runs in reverseIt is a single phase motor with four brushes that have no power to them there is no capacitor eitherIt is an old style motorAny help would be greatly appreciated even what type of motor this isThanks David

Asked by David Ferguson 11 months ago  |  last reply 11 months ago


A fountain that does NOT run on electricity

I know it is possible to build a fountain that runs on gravity and water pressure, but I'm not sure how to go about making one. I understand that you can't get something from nothing, and I'm not looking for a fountain that would run endlessly. If someone could show me the basics of how such a font might work, I would greatly appreciate it. 

Posted by Trigonography 8 years ago  |  last reply 3 years ago


pumping water without electricity?

So I want to build an aquaponics system, because they're awesome, but I need a way to move water about 6' verticaly. I dont have elctricity where I want to put it, and there's not going to be. The water needs to be moved from the bottom of the fish tank, to the top of a resivoir tank. I want to buy the least amount of stuff possible for thisproject, so I could use some help:D

Posted by jakem456 8 years ago  |  last reply 1 year ago


Electric Power DC Generator

I've been toying with the idea of trying to build an electric generator that after receiving initial power to start, could power an electric motor that would in turn somehow power 1 or more generators and would not only produce enough power to continuously power the motor, but also allow it to distribute power for use with an inverter or stored in batteries. Am I crazy that I dont see where anyone has tried this or is it just not possible? Obviously, there would be friction forces from the generator(s) on the motor and it may be difficult to produce enough power to even run the motor, but does anyone know of anyone that has tried this? I've been reading peoples posts and really enjoy looking at other peoples ideas on this site and decided to sign up. Thanks.

Asked by AggieTX 7 years ago  |  last reply 7 years ago


Lego pneumatic electric valves?

Hey all. I was just wondering, I want to use the lego pneumatic parts like i would for the fischertechnik ones. And I was wondering if anyone know where i could buy an electric solenoid valve approapriate for the lego pneumatic tumes and pressures. 10-50 psi. or so. OR, if i cant find valves for the lego, where could i get a fischertechnik kit that had EVERYTHING needed including the electronics, motors, sensors, solenoids, tubes, wires, and everything else.

Asked by sci4me 7 years ago  |  last reply 7 years ago


DIY Electric Cello (PVC??)

Hey guys, I've been looking around at making an electric cello (or perhaps violin, but we'll focus on the cello) and I found a few random sites that had instructions for that... but then I ran into this:https://www.instructables.com/community/Homemade-Holidays-Winners-Announced_1/(scroll down to see 'pvc cello') However the link doesn't work anymore! Can anyone help me find instructions on how to build one??Or perhaps the location of instructions that can help you build these: http://www.halcyon.com/jensmus/scello.htmThanks!!

Posted by Vitron 10 years ago  |  last reply 3 years ago


Replacement electric razor foil

Does anybody know an inexpensive way to replace the surface foil on an electric razor? I think it's called foil anyway; it's the metal part that contacts the skin and is a mesh of small holes for beard hair to pass through. The raw foil stock must be relatively cheap to fabricate; maybe there is a way to get a sheet of it and put it on the original frame from the shaver. Most replacements are almost the price of a whole new shaver. And I haven't even found a replacement for my modified, ancient Braun system 123. After the shaver died I resurrected it and made it solar powered by tearing out the charge circuitry and batteries and replacing them with two batteries and a diode that plugs into a small solar panel from a garden light. This worked perfectly for years until the foil wore through last week.

Asked by snotty 8 years ago  |  last reply 8 years ago


How to make an electric gate?

Hi, so an office building near my work changed from physical record keeping to electronic record keeping. so they got rid of those big sliding records cabinets that were so heavy that they had to be powered by electric motors. - which I grabbed from the dumpster. the motor has a cogged wheel thing that will suit a bicycle chain perfectly, anyway moved in to a house and would like to build a sliding electric gate utilising one of these motors and this remote control unit from ebay- http://tinyurl.com/6zmm99p any one got any ideas? for safety I need to have a safety stopper thing so it doesn't crush a child when it is closing. I have limited area where I park my car so i can't have hinged gates. they have to slide along parallel behind the front fence. yeah. my house is very close to the front frence (about 7 meters) so connecting 240 volts (I'm in OzStraYa) is not a drama. The gate will be a metal frame about 1.8 meters tall and about 3 meters wide. running on a track. ideas please. or links to other DIY electric gates. thanks

Posted by altomic 7 years ago  |  last reply 7 years ago


Battery electric shutdown and restart.

Hi everybody I am improving my robot ( https://www.instructables.com/id/Blu-Media-Robot/) with a 12v battery I made a switch panel to turn on off the arduino board and the raspberry pi . If I turn on everything in same it s ok . My question are: Why if I am using my raspberry and I turn on my arduino board ; why the rpi reboot? (battery trouble) And can I fix it ? Thanks for your time

Asked by LaurentP30 6 months ago


Help! Thermo Electric Generator

Just wondering if any of you knowledgable folk can help me out. Of late I have experimenting with solar cells and energy production. I have been calculating some interesting results, many of which due to the use of lenses, magnification and mirrors etc. Alas this has led to more that on fried solar cell due to the temperatures im dealing with. Is there any practical way to obtain/construct a Thermo electric generator as pictured? I have spent some time with my friend Google, leaving me with little more than the notion that perhaps this technology is out of reach of the home experimentor. Think giant light cannon that can melt pennies. How can I harness this heat directly as apposed to, going the boiler/steam powered engine method?

Posted by Lftndbt 10 years ago  |  last reply 4 years ago


HOW TO Basic electric wiring ? Answered

Hi community , i need help to wire my small project  and its about a water dispenser, but with the big water bottle(22liters) is on the floor, so there is : a water  pump(to pump water to a small tank on the water dispenser or cooler),rocker 3 position switch, floatswitch, electric transformer 220-12v.  WHY? a 3 positon switch  the pump works on 2 different modes _ the first continuous mod that stops only when the small tank is fully filled ( wired with the  floatswitch ) _ the second mode is : just a simple working pump with no stop ( not wired to the floatswitch ) So TAKE A LOOK ON THE ATTACHED PHOTOS PLEASE LET ME KNOW HOW TO WIRE THE ROCKER 3 POS SWITCH , And if there is a wiring diagram that will be the best of the best !!!     Thank you, ""HELPFUL community""                      

Asked by vwtm2006 4 years ago  |  last reply 4 years ago


Self charging an electric bike?

Hi all, I am always amazed at the ingenuity here and after many years of being fascinated I would like to ask my first question.  I'm thinking of getting or converting/building an electric cycle.  I've been told by local dealers that none except the very expensive have a recharge facility for sat when you go downhill or are freewheeling,  That seems a waste to me so I am thinking ... why not buy a used wheel with a hub motor and fit it at the front wheel and that raises the following questions in my mind ... Can hub motors be used in reverse as generators?   Would the output be speed (rpm) dependent and if so then if said cycle has say a 36 volt system would it only charge the battery if the 'generator' is producing 36v or close to? If so would it be better to find perhaps a 24v hub motor to use as a generator and charge the battery via a variable input, 36v output step-up? I appreciate it will be less than 100% efficient when both using electric at the motor and charging at the 'generator' but would anyone have any idea how inefficient?  I'm fit enough to cycle on the flat but would appreciate help on the hills!! I assume I will need a diode or similar ... does anyone know where I can find a suitable circuit diagram Lots of questions I know ... sorry. David

Asked by HRobinson 3 years ago  |  last reply 2 years ago


How much electricity is dangerous?

I found plans to make a device to give yourself a static charge using a negative ion generator. It outputs 7.5 kV and 10 mA. I've seen it in use and I know it's not dangerous. I wanted to build two of them together making it output 15 kV. Unfortunately that would also make it 20 mA. I'm not sure what the resistance of the human body is so I guess my question is will 15 kV and 20 mA flowing through a person be dangerous? Thank you for the replies and I'm sorry if this is a stupid question. I'm pretty new to my electronic hobbies.

Asked by bruechel87 6 years ago  |  last reply 6 years ago


Solar Powered Electric Wheelchair

I would like to put a Challenge out there for anyone to come up with. You see, I am in a wheelchair and I would love to go hiking with my son, but my chair can only go so far before it needs to be plugged back into a socket. I hate this, because it keeps me from going most places I want to go outdoors. But it dawned on me that if I had a Solar Powered Option to my chair, nothing could hold me back from being outdoors again. Ok yah,  it would help if I could redesign the platform & wheels too, but that's not the most important part... I NEED POWER. So, if anyone feels like taking on a new challenge and you are into Solar Power perhaps you could help me in this way. Thank You for your time in reading this, I hope to plant seeds of inspiration with all of you! May Love Light Your Way, Blessings! 

Posted by CherishJames 1 year ago  |  last reply 4 months ago


Motorized/electric vertical blinds?

I have some vertical blinds in my living room that are manually driven via a cord to tilt the blinds and another cord to open or close the blinds. I wonder is there a conversion kit to open/close and tilt them electronically via a remote control? I have found some kits from hundreds of dollars to thousands, but know I could find one or build one for way less. Any thoughts or ideas?

Posted by flaresider80 6 years ago  |  last reply 5 years ago


rectify electricity before transformer?

Can you rectify the US mains (120vac, 60hz) as it, and used the pulsed dc to feed into a transformer and get a dc voltage out of the transformer? I'm asking this because it would be much much more efficient for high current situations. Here's my specific situation:I want to build a capacitive spot welder and a capacitive discharge cutter in an all in one device. To charge the enormous capacitor rapidly (1.5 farads in my case), I need a very high current power supply. I'm using a modified microwave transformer that was rated at 1kw, and it is now modified so that it outputs 12 volts AC at around 80 amps (probably less because of losses). This must be rectified to charge the capacitor.Assuming a perfect transformer (for arguement), it would have:120volt, 8.34 amp input12volt, 83.34 amp outputthe following is with full bridge rectifiers, assumed voltage drop: 1.4vIf the power was rectified before the primary, the loss on the bridge rectifier would be: 11.67 wattsIf the power was rectified after the secondary, the loss on the bridge rectifier would be: 116 wattshuge differenceso once again, the final question is: Does rectified input of a transformer = rectified output? Does the 120hz pulsed dc (as opposed 60hz ac) matter? Could this setup charge a capacitor?

Asked by guyfrom7up 9 years ago  |  last reply 2 years ago