Rotational Charger?

Any ideas how one could transform rotational movement into usable energy?  I want to attach a little radio device to a tire and have that device charge a little battery when the wheel rotates so that it can transmit information (i.e. rpm).  Was thinking of using a small Nordic radio and accelerometers to transmit data.  

Question by swaxolez   |  last reply


Rotating Lighthouse with LEDs?

I bought some LED strip lights  They let me cut them apart in bunches of 3.  I was hoping i could cut about 8 to 12 of these 3 Led sections and create a led lighthouse.  I just want to have a way for them to cycle on and off so it looks like it is rotating around.  I am going to stand the pieces up and down all around the lighthouse light area.  But i cant find any instructions on doing something like this.  Each three led section would need to turn itself on and off in sequence.  Or 2 or 3 can be on at once if it is easier just so it looks like it is rotating around it.  I would like it to go slowly around like a lighthouse Does anyone have any idea on how to accomplish something like this.  These new strip lights are very bright i was surprised how bright they are.

Question by cspooner   |  last reply


Need help making a Rotating Massager

Need help making a Rotating Massager with  a LONG HANDLE. We can get 'vibrating' massager with long handle but not able to get a rotating massager, for back etc. Need to have a high power rotating massager for body massage, but cannot get one in the market. Appreciate if we can make with materials available in the hardware store etc. The  motor should run with simple 230V AC supply like ordinary massagers do. Any help greatly appreciated.

Topic by rshyam   |  last reply


How to mod a web cam for making it rotate?

I want to have my web cam mounted at a specific place in my room and control the web cam rotation using  the USB interface and some program on my pc. I was thinking of having the web cam to be mounted on a USB rocket launcher sort of thing, but it would be great if i i find an instructable which tells me how to do this using a few stepper motors which i have from my old printers. Specially i would love if a stepper motor control system through USB port is provided.

Question by muhammajunaid   |  last reply


how do i rotate a 3 v dc motor 90 degrees at a time?

I would like to use a limit switch to stop the motor and a push button switch to start it again and move it to the next stop. There will be a mechanical arm at each 90 degree position to trigger the limit switch.

Question by reland   |  last reply


Chasing circle of LEDS...?

I'm in the process of making a UFO model for the local Railroad museum's model trainset.  What I want to do is have the standard disc shaped UFO with embedded LEDs on the edge.  I would like the LEDs to chase around the edge repeatedly while the display is on.  I've looked into using Arduino, but size is a factor.  The UFO is going to be about 6" across.  As far as I can tell, I can use a 555 and 4017 to work it out, as but that limits me to 10 leds, right?   If it can be worked out, having counter rotating circles would be great... But that would be duplicating the circuit and reversing the 4017 pin outs... AND...where is a good place to buy small quantities of LEDs and ICs?  My local Radio Shack has nothing in stock

Question by athos76   |  last reply


Rotating Antennae Wiring Question? Answered

Ok, something I've been thinking about for awhile.  Say you have an antennae/radar dish/etc that rotates 360°. Naturally, you have wires running up to the antennae connecting it to the rest of your circuit/broadcasting/receiving device. How do you prevent the wires from wrapping around the antennae and causing it to stop or causing the wires to break? I suppose you could reverse the antennae every so often to prevent this, but there must be a better way. Also, I figured you could have some sort of connection that rotated around, but it seemed that a rotating connection could be problematic if debris or something got in the way. It also doesn't seem like a very solid way to connect the two devices together.  Not actually building something here, just a curiosity. Thanks!   

Question by transistorguy   |  last reply


Any suggestions on how to build a rotating solar sunflower?

Any suggestions on how to build a rotating sunflower (span of about 3 or 4 feet) to hang on a wall (sunflower will be made of fabric or perhaps a sticker image on foam)? It's in front of a series of large windows, so I'd like it to be solar powered. I was thinking of working with toy motors, but I think the RPMs would be way too fast - I'd like it to move fairly slow, maybe completing a full rotation in about 10 seconds or so. Any suggestions on what type of motor/solar combination (and where I can get these items) would be great. I'm trying to mount these on walls (multiple numbers of them in different sizes).

Question by    |  last reply



What are continuous rotation servos?

Does 'continuous rotation servos' run on commands like myservo.write(360) (for Arduino servo library)?

Question by sarveshk   |  last reply


Pinterest image rotated, bug?

Anyone having issues with images rotating when they try to share in Pinterest? When I try to share, some of mine have their images rotated 90 degrees. Attached a screen shot. Anyone know a solution to this? I emailed support to see if they have some suggestions.

Topic by jpmarth   |  last reply


Pin-Pressions/ Rotation Sensor

I'm trying to build a sensitive pinpression device: one that can see 3d digital images. The device would be able to read, record and organize the depth of each pin. I think the first problem to overcome is figuring out a cheap way to measure pin depth. I think it will be best to do this with rotation sensors. Does anyone know how to build or where to buy cheap rotation sensors?

Topic by yes   |  last reply


Create a motorized rotating TV

Hey all,  I am trying to create a TV mount that can switch from horizontal to vertical at the click of a button but I really have no idea where to start. Is there a way I can motorize this mount? https://www.amazon.com/Mount-It-Low-Profile-Landscape-Portrait-Panasonic/dp/B005MHGCSK 

Topic by TylerL62   |  last reply


Advice for newbie - rotational art?

Hi there, A few years ago I picked up a lovely ornament - a crystal ball contained within a conical spiral wire thing.  When suspended you could manually spin the wire to create the illusion of the crystal ball falling (very poor explanation but hopefully you get it?). Anyway - I've always wanted to automate this, so that you can hang it up in the conservatory and enjoy a nice cup of tea whilst this thing continues to spin. My simple idea was to have the ornament hung on a basic motor (solar powered / using a solar powered battery would be even better). And that's where my idea stops.  I've searched online and remain baffled by the plethora of motors and accessories that I might need. In very simple terms can anyone advise what: electric motor I need (the ornament is probably around 1kg, I'd like it to spin at around 60 rpm?) whether I can power it via solar (ideally to charge a battery so that I can have it working at night when there is no sun!) Any other helpful tips? First time on this place - looks incredibly interesting and fun. Thanks in advance, Jamie

Topic by Jamie_Jumbles   |  last reply


Lighthouse pulsing light

Hi all - I am building a wooden model lighthouse, it will stand 5 feet tall and become my driveway landmark. I have been searching for a good light circuit, a non-LED version, preferably using 120v AC. I would like the light to just do a slow flash or pulse and haven't found a circuit anywhere. I did find one SCR simple circuit using a high rated capacitor, but I am looking for more options. I have a coloured halogen which should do the job well enough. So have any of you brainiacs come across any circuits close to this description - thank you for reading / responding. Bill

Topic by bstacy37   |  last reply


Rotating Powered Display for GEEK swag

OK, Ill admit it, I'm a nerd.  I'm a Star Wars fan, and I got a new den that I want to geek out. I have a museum-quality X-wing fighter that I want to display on a counter top (&&&).  The piece has a display base, and a acrylic post that the model sits on - and through which three wires go up into the model and illuminates the outer engines, and numerous cockpit fiber-optic display bits.  It is uber-cool to look at in the dark. 8-) But I want to fab a custom display base that ROTATES so the model does a slow 360 revolution over, say, a minute or so.  But I also want to KEEP the lights. So, my puzzle is this.. How can I fab POWER RINGS, so that my model can display its lights as it revolves? -Or- Is there any way I can hack some kind of cheapo commercial wireless power conduction thing, so that I dont really NEED hard wires at all.  I can rig some rechargeable battery pack onto the rotating display base, and something that transmits the power on the table-top base (that doesnt rotate).  To be clear, the motor that does the rotation OF the base I can wire directly to the wall, But for the LEDs built into the model, I figure I need maybe 40mW of DC power that I want transferred to the batteries on the top to juice the model while turned on. I get this idea from my Wii wireless controller recharger.  I only have to put the controllers onto a special plate plugged in to the wall when not being used, and they recharge.  With this, SOMEHOW, power is getting to the batteries in the charger *without* being directly wired to the charging adapter. Anyway, since everyone on this site is a genius, I know the can give me an idea or two. HELP ME GET MY GEEK ON. -Dave &&& If you're interested, it's the eFX Collectibles RED FIVE X-Wing Studio Scale model,

Topic by Clone_Wolf 


ideas wanted: I need to build automatic 180 degree swivel chair for stage prop

I need to build an automatic (motorized) chair that can swivel 180 degrees for a stage prop on the cheap. It must be able to support at least 200 lbs (the chair and the person in the chair.) I found the swivel hardware that can support up to 750lbs. Now I'm trying to figure out how I can make it turn 180 degrees. (Kind of like the chairs on The Voice that comes on NBC. Thanks

Topic by Shanne69   |  last reply


How do you connect something that is spinning to a power outlet i.e. the lights on a ferris wheel?? Answered

I want to build a light rig that's spinning around it's own axis. Like a carousel or a ferris wheel. But without putting the power source on the rid. How do you do that without the cables twisting?

Question by Patriktg   |  last reply


I am looking for ideas on the best way to make a Solar Garden Light replicate a 4ft lightouse light.

I bought a cheap 4 ft wooden lighthouse and want to add a solar powered light in it. It doesn't have to be bright, infact I don't want it to keep the neighbors awake. I just want to buy a cheap solar garden light, and make it flash for say 5 seconds on and off. or if possible, make it appear to be rotating by having it repeat the pattern(soft, bright, soft, off, off) I saw a nice schematic for that somewhere, but it has been a while since I messed with building circuits and I'd rather try and keep it simple. Any ideas, also is the solar garden light the way to go, or do you have something better. Looking to do it all for $15 max. Also, I would like to add 2 switches, one to bypass the photo cell and showcase it during the day. and the other to turn the whole thing off.

Question by RumRunnerXT   |  last reply



DC MOTOR ROTATION problem with ARDUINO !!

Hey there ,i have a simple problem in my controlling motor with arduino project that i send 5v to it at the top of the code but many times it gives a very small incomplete rotation (a small step i mean ) and stops the code not allowing to complete it , if i give a hand help to rotate it rotates properly and some times without help . so how to make it rotate without hand help ? and what is the idea ? thanks .(i am using l293d)

Question by mohamedsaad194   |  last reply


linear input to control a rotating servo? Answered

Im trying to build a circuit in which an input uses linear motion to control a rotating servo. the servo rotates clockwise/counterclockwise, and the input should have 3 inputs. turning the servo clockwise, turning the servo counterclockwise, and a neutral option so the servo doesn't have to always move; the neutral would be between the to rotation inputs. The closest form of an input I've found so far is a sliding potentiometer since it is controlled by linear motion. If there's a better input that can have those 3 inputs i'd love to know.

Question by explosive_bagels   |  last reply


How to find the rotating shaft rpm?

I have used AC motor of 750 rpm... motor then transmit its power to gear box then to shaft... on shaft rope drum is connected to do the required work i-e lifting or lowering of load

Question by waseemhaider.syed   |  last reply


Some help with camera tilt/rotating?

I am trying to make my own Pan and tilt timelapse device, to use with my camera (such as an Emotimo TB3). I want the design to be pretty feasible, but I want this to be fairly professional (in case I can market the idea.... idk about that but maybe I might be able to at some point). The problem with my design is that I want it to be pretty small and lightweight, so having the camera mount above the head seems like a good idea - (like this) However-that takes the camera away from the axis of rotation, increasing the strain on the motor (not a huge problem), but my main concern is that having the camera rotate off-center from the axis would cause issues, say, if the rig was used for gigapixel photography.  The other option is to mount the camera in line with the axis of rotation, but that causes a much larger design (which would look somewhat like this) So from someone who knows more about cameras than I, If I took a camera and used it in gigapixel photography (which would be the rigs second use), would having the camera rotate out of axis create problems in stitching, etc??

Question by astroboy907   |  last reply


Help with modifying a servo for continuous rotation?

I want to build a robot with arduino and for the motors I was going to use some servos that I could modify for continuous rotation.  So, I picked up 2 cheap ones at radioshack.  I opened them up and I can get to the gears by removing the top part and I can get to the back of the circuit board by taking off the bottom.  But the circuit board is soldered in so I can't take it out to get to the potentiometer. I tried desoldering the connections to the motor but there seems to be more joints to desolder before I can take out the circuit board completely. And I don't want to desolder every joint and then have to solder them again when I need to put them back together.  So has anyone modified these radioshack servos and can tell me how to get tho the potentiometer? Or can anyone tell me if there is a way to modify them without getting to the potentiometer? Thanks.

Question by texpert   |  last reply


Rotating a simple DC motor really slowly (1 rotation per 2 hours)?

This is to rotate a bike chain on a small cog. After doing some research, I came across a component called a Pulse Width Modulator. Would this be suitable for turning a simple DC motor at 1 rotation per 12 hours(EDIT: I meant 1 rotation per 2 hours, not 1 every 12 hours)? Or, would it only get me to a certain point before I need to use gear ratios to achieve my ideal revs? This really is a budget project so nothing too fancy.  Thanks

Question by Nenagh   |  last reply


how to find torque of a rotating actuator shaft..

Am doing a project on developing a instrument helps finding the torque value of a actuators rotating shaft before fitting it to the valve ....

Question by prithiv   |  last reply


How to reverse the rotation of a vacuum cleaner motor? Answered

I'm possession of a vacuum cleaner engine and I'm trying to reverse its rotation..So far I've tried reversing it's polarity with no success but I looked up the 2 ICs on it's chip and it has a555 timer and a 7-stage binary counter.(see: http://www.standardics.nxp.com/products/hef/datasheet/hef4024b.pdf)There are only 2 wires running to the engine from the chip so I presume there is no feedback.Furthermore there is a potentiometer hooked up to both the ICs which regulates the speed of the engine (and no AD convertor as far as I can tell) so the voltage changes the PWM output as the engine is rated 230V.All ideas are welcome =)p.s.(I can't supply you with pictures right now, sorry)

Question by Prodigity   |  last reply


change rotation speed | standard clock part

Hi all is there an easy way to speed up a standard clock module part (please see attached JPG picture). - would like it to turn 3 times faster. - can add any extra external circuit - can increase the voltage i.e. 2 x AA instead of one i know v. little about electronics. Also important to know how this will affect the power consumption.... thanks

Question by oem_odm   |  last reply


How does this rotation control mechanism work? Answered

I've been trying to figure out a good technique to control the motor rotation in a split-flap display. I've found two methods that I want to compare. One is with a NEMA8 stepper motor (I want to try to keep things small and easy to replicate), the other technique is with a method I've only seen in one place, and I'm not exactly sure what's going on. You can see the video here. From what I gather, they have a DC Motor, that controls two discs. The right hand disc acts as your zero reference, and the left references each flap in the split-flap display.  I can faintly see a red light flashing that I think is on the left hand connector, that flashes every time a groove in the wheel spins past. The right hand wheel only has one groove in it, and when it's facing straight down, you'll see the LED turn on. I imagine the LED is turning on to let the programmer know that that sensor is picking up the groove, but I don't think it's the sensor. I also think those grooves are super important to the sensing, but I don't know how. I know how ball mice work, but those require a IR emitter/receiver on each side of the wheel. I can't see that here (though it could be hidden). So my question is, how does this work? Or, if it's a better question, what is the simplest/cheapest way to get precision accuracy (and the ability to zero if things shift out of place) out of a DC motor without programming the stopping points? Any help is greatly appreciated.

Question by StumpChunkman   |  last reply


3 Axis Rotating Flight Simulation Rig

I have currently started building a 3 axis rotating Flight simulation rig that can simulated any 3D motion with a pilot inside the main cabin in control. I know the project needs a lot of disciplines working together (Steel design-mechanics-electrical-electronics-control-programming) So I assembled a team of engineers who got interested in the idea but we are not all highly experienced and the issue is new to all of us. So far we managed to design the rig it self as in steel design area. when we started moving along to the next phase which is the mechanical parts and joints we faced a lot of issues regarding the weight and balance of the rigs. The attached image is for a flight simulator done by a company in Russia. We have great ideas for improving that design and building our own non expensive simulator. I didn't post our full design model done in solid works cause it's not yet perfected. All I asking is that , if there is any one out there willing to help us share the knowledge or has a bit of experience in the subject, or wants to join our collaborate work, please don't hesitate to contacts us. I don't know the forum rules so I won't post my contact information here, but please feel free to discuss the subject with us on the forum, so we might benefit all together from this experience. 

Topic by zayed_hossam   |  last reply


Is it correct that if an 8-inch diameter wheel was rotating at 1,000 RPM then the vehicle would be going 12 MPH? Answered

I'm making an electric mountain board and I am trying to find what gear ratios work to get the speed I want. I don't know if my math is right and I was just checking.

Question by bowmaster   |  last reply



Control rotation 3 phase mortor with visual c ??

Hello everyone. i have one project to control the rotation 3 phase motor with visual C. But i don't know how to do that. anyone who know tell me how to do that please :)

Question by pfromthailand   |  last reply


Help modify the maximum rotation for my steering wheel.

Hi everyone, i have a steering wheel from trust , i dont know the details. so, i attached a photo to understand better what i`m talking about. i play racing games, and i need a maximum rotation, i installed the drivers for it, so when i am in aprox 45 degree rotation it show and he behave like i`m in the maximum rotation. The maximum rotation is aprox 135 degree, so its a difference between them. i opened him, because i finished an tehnical university with a electromechanical profile, and try to modify the potentiometer that handle the rotation. i tried to put a smaller one, a bigger one, even try the fine course like its called, but nothing, i attached a photo of it two, maybe i forgot something. If anyone think or have an idea what to try , please help, because i have no other idea.

Topic by danyelo   |  last reply


What would happen if you stopped a galaxies rotation?

I mean a total complete standstill, every dust particle and bit of matter stopped moving rotationally in relation to the galactic center. Would the gravitational effects drag everything to the center if it stopped rotating over a few million years or would everything fly off in a straight line if it stopped instantaneously and eventually fall back into the center? 

Question by The Ideanator   |  last reply


Very slow rotation (1rotation/hr) electric motor? Answered

I am  looking to build an electronically controlled time lapse pan device for my camera. I want to be able to rotate the camera for a specifically timed time lapse (e.g 90 degrees every 20 minutes of shooting). My problem is finding an electric motor that is slow enough RPM to create this slow of a motion... Right now I would need a motor capable of going down to about 1 rotation in 6 hours... at the very least 1 rotation/hr.  So, do those motors even exist? Right now I am thinking the best solution would be to have a stepper motor, connected to a gearbox (right now that would be the inside of a kitchen timer, somehow), that would allow a very slow rotation of 1 axis. However, as this is a mobile build, power constraints are really an issue. I would like to be able to shoot for 6 hours max continually, and I dont know if that could be done without a very low power motor.... If I did the stepper motor connected to a gearbox, do you think that would affect the linearity of the time lapses? E.g would the stepping motion of the motor create a choppy vid?  I have looked into the kitchen timer timelapse but have yet to find a timer that can hold up my relatively light Panasonic FZ-100 without locking up...

Question by astroboy907   |  last reply


transform 1 rotating axis into digital counting system?

Hi i have a rotating axis which i want to transform into a digital system. With this i mean it has a disc attached to it with numbers on it, which rotates with the axis. After the first disc there is another disc, which turns only a little bit, and only if the first disc has rotated 360 degrees(so that after 9 comes 10) This way i should be able to make a third, and fourth disc, which work the same way as the second. Then it is a counting system. I have thought about how i could do it, my ideas were all so complicated i could impossible make the discs a little close to eachother. Is there an "official" technique for this or does anyone of you have an idea how i could do this? thanks ps: here is a simplified image of it for if you didn't understand what i meant

Topic by merijnvw   |  last reply


How to reverse/invert/mirror a computer screen?(not rotate)

Hey guys. So I'm working on a project, but I need to know how to reverse my computer screen as if it was in a mirror. That way, when you hold up a mirror to the computer screen, it appears normal. I've dug through many articles on the web, and I couldn't find anything that worked that hadn't been taken down. Does anyone have any software that could do this?

Question by RedCthulu   |  last reply


DIY continuous rotating servo motor for cat toy?

I'm trying to make a cat toy for my cat based somewhat loosely off of a toy called the fling-ama-string. http://www.youtube.com/watch?v=rwB4kmTd440&feature;=related I have one and he seems to like it but since it only moves vertically I've noticed that he gets bored quite quickly. However, when I lay the fling-ama-string horizontally on my table and the string runs over the edge of the table he plays with it a lot longer. My idea was similar to something like this: http://newswatch.nationalgeographic.com/2011/06/15/the-cheetah-run/ Which seems to have a motor running a line from across one side of a field to the other. I obviously do not need one as heavy duty as this but I feel like if I were to rig this around the leg of a few pieces of furniture and let my cat run around chasing the lure a few times a week he'd really enjoy it. My issue is what kind of motor do I need and how difficult is this going to be to set up? Also, I'd like to spend less than $50 on all the parts for this but seeing as how the motor itself might be somewhat pricey I can understand if it goes over my initial cap. If anyone has any ideas I'd really appreciate it!

Question by lasingparuparo   |  last reply


What would be the easiest way to make my security camera rotate 180 degrees?

The cheapest or easiest way to make my security camera rotate?

Question by    |  last reply




Name this thingamajig

Hi I'm trying to locate or build something I don't know the name of and searching around hasn't proved helpful, perhaps somebody here could put a name to it so I at least know what I'm searching for?  It's a mount which allows something to rotate  horizontally a full 360 degrees  continuously (similar to the column rotation on a tripod) however the object to be rotated needs cables passed to it through the mount unhindering the rotation - some sort of contact connection?  Ideally I want the mount to have a powered rotation but putting a name to this would get me on the right track. Thanks in advance. Garrett

Topic by garrettlynch   |  last reply


How can I turn rotational motion 90 degrees?

I want to connect a horizontal, spinning shaft to a vertical shaft so that the first shaft will spin the second. Does anyone have any suggestions other than a gearbox or pulley/belt arrangement?

Question by rogers236   |  last reply


Controlling a motor and its speed of rotation using a potentiometer and the arduino?

Me and my partner are trying to build a 2 player "game" if you will.. where each player can have their own potentiometer to control the rate of speed of the motor to do what it needs. We are new to using the arduino but are yet required to build this for a school project any help would be greatly appreciated.. It would also help if anyone knew what kind and size of motor to buy. we just need it to be able to spin a circular piece of thin plexiglass.

Question by DragonExploder   |  last reply


How much power is generated by a motor when we rotate it?

For a special project, I need a dynamo but I can not found it,because I belong to rural area.So I want to use dc motors instead of a dynamo,but how much efficient is this I don not know.Please tell me how much power is generated by a 500 watt motor.How to find it?

Question by kkp7649   |  last reply



Looking for a specific button/potentiometer ... can you help please ?

Hi. I'm looking for a button/potentiometer ... best described as AIR CON control in car. Where the middle is a button (on/off) - not rotating and it's just the round edge that is turning/rotating. Preferably continuous rotation, so there isn't any min /max for the rotation. Please,  can you advice the proper "English" name for this part. Or a link to few examples ? THANK YOU in advance. Z

Question by zholy   |  last reply


Is there a way, when writing one up to rotate pictures for Instructable on this site? Answered

I am working on a Mac and sometimes when I upload pix for an Instructable, they are oriented the wrong way. The only way I've been able to overcome this is to go back out to my picture file and play with the picture and rotate and save it a couple of different times and then, maybe it will be the right way when I upload...anyone else run into this? Is there some "tool" on this site which allows us to rotate pix? Thanks much~?

Question by jamilks   |  last reply