### Anti-gravity Machine concept

This is a concept I came up with for an idea of an anti-gravity machine.  Let me just state for the record... I do not think this will actually work.  However, while I am quite certain this idea should not work... based upon my limited knowledge of science... it would seem like it could work.  Unfortunately I know I am never going to spend the thousands if not millions of dollars to build this concept to find out. The basic premise of the idea is the use of angular momentum to overcome the force of gravity.  Imagine if you will, a gyroscope spinning at such a high velocity that its outward force overcomes the downward force of gravity.  Naturally, one of the big obstacles is generating the speeds necessary to create the velocity such that angular momentum is greater than downward force. What I essentially propose is a spinning ring that is propelled in the same way as a maglev train.  Using Electromagnetic propulsion or EMP to accelerate a ring in a vacuum by the utilization of a flowing electrical current and magnetic fields may in theory generate the speeds necessary for the force to overcome gravity.  Unfortunately, the power to run such a vehicle and the weight to power ratio are significant obstacles. Two of these rings above one another I theorize can create tremendous propulsion if the angles of the rings were changed.  Using hydrolics to change the angle of alignment of these two rings may create incredible forward momentum.  Once more, such a vehicle would not be limited to operation within Earth's atmosphere unlike jet or other propulsion mechanisms.  In fact, it should operate at peak efficiency in a zero gravitational environment. This is all theory... and I'd love to know if it is indeed as crazy as it sounds.

Topic by DarkRubyMoon   |  last reply

### do it yourself 4 wheel adult sized pedal bike car

In spring I got idea to build a 4 wheel pedal car for my son. To use wheels from old bicycles, to make it as small and light and simple as possible and to make it possible to fit even an adult person. I was really disapointed surfing internet, as I found almost no free ideas, plans or experiences how to do it. It is no nuclear science, people would invest millions in their know-how, so they would need to hide it! Now it's autumn now and our car is done. I decided to share my experiences and detailed photos as free plans with other people, interested in self buliding pedal car of that kind. I wanted my 9 years old son to learn basics of construction and working with metal and wood. He did almost all hand works by himself and he is very proud on it. It is a very good way to move your child from TV and computer games! It is all on our 4 wheel pedal bike car web site

Topic by teospiller   |  last reply

### Did you see a UFO or not?

I could not sleep so I went for a little bike ride to get some fresh air and burn unwanted kalories. To my surprise one really bright "star" began to move and because it was night my conclusion was a plane at low altitude or making a turn. After a while however it looked more like this "light" is still coming towards me and if you know planes this would mean it should have crashed already - which it did not. But it definately came closer and once almost over me I also realise it does not move in a straight line, more in a slight zick-zack movement. Biggest surprise was the shape I could make out, definately no plane that I know of! To me it looked like a cigar shape which was much wider in diameter on one end. Can't say front or back as the flight patter did not incate anything like this. Any directional changes happened without the shape changing direction, if it moved to the right than without turning - it just "slided" while the long shape kept pointing in the same direction as before. Took about 10 pics on my phone but even after checking on the computer there is only black on a black background, not even a single star visible :( Just to get me right here - I do believe in other planets out there having intelligent live but I do not think intelligent "creatures" from outer space would come to visit us. The term UFO means unidentified flying object and nothing else was there that I saw - just something that makes no sense in terms of following known laws of physics flying through the night sky. Would not even bother to write about it if any of what I saw would make sense to me. There was no sound, which was really strange. IMHO the craft was at an altitude between 1000 and 3000m not higher. It also seemed the light I thought came from a plane was coming directly from the fuselage or hull and not a lamp, looked like the outer surface was glowing. But seeing something moving quite fast over your head with no sound at all is just weird.... The zick zack movement was strange too but when the craft took off to disappear into the night it was like instand accelleration. Within an instand the light went really bright and was gone over the horizon - never seen anything move that fast! I know there are lots of secret military aircrafts out there, same for people playing with drones but this was much bigger, would say at least 400m long. Even if the altitude would have been much lower in reality than what I thought it would have been huge - and totally silent. Spent the last hour or so checking some videos on Youtube but nothing really matched what I saw. So my question(s): Did you ever see something moving with impossible speeds, making impossible turns or accelerating like no tomorrow in the sky? And if so: Did it look like an oversized cigar, bigger on one end and with a "glowing body"? Do you know of any prototype craft being the size of at least two Airbusses in lenght that can fly without making any noise at all? Disclaimer: I do realise what sort of "crap" I am writing here. I also acknowledge that I don't know everything that can fly. I do not think that I saw an UFO in terms of being "out of this world". Yes, I know my level of insanity ;) I do not claim to have seen or being abducted by aliens either ;) And no, I have neither been blind drunk nor on drugs when I saw this ;)

Topic by Downunder35m   |  last reply

### modéle 3d

Bonjour, j'habite le nord de la france , je suis très intéressé par les nouvelles technologies , je me débrouille comme un débutant avec les logiciel 3 D ( rhinoceros sketchup ) j'ai un modéle de voiture 3D obtenu sur le net , que je voudrais transformer pour le rendre étanche solide stl pour pouvoir travailler dessus avec le logiciel 123D MAKE de solidwork et éventuellement l'imprimer ; qui peut le faire ou me guider pas à pas ,se serait cool ,

Topic by fanauto

### Any Way to Easily Obtain Deuterium?

I've had an interest in how physicists obtain deuterium for their experiments (especially those dealing with nuclear fusion).  I know it comes in small quantities in water, in the form of deuterium oxide ('heavy water') .  It also comes in the form of 'heavy methane' also.  I've looked at several patents dealing with extracting deuterium from such sources.  Is their any do-it-yourself (DIY) techniques that could use every day materials to obtain deuterium?

Topic by bigboy4006   |  last reply

### Rockets!

I have an old gunpowder rocket lying around in the garage, I am debating whether or not to dig it out. It is a fairly simple thing if I remember correctly, only 2 stages and the payload has a parachute for landing. I would like to know if anybody is interested in seeing a video / slideshow / instrucable on it? While I'm there I might find my old water rocket valve. And if I'm feeling really bored, I might make my own rocket and charges :-)

Topic by DELETED_zoltzerino   |  last reply

### High Resolution view of Victoria Crater on Mars

NASA has released a beautiful high resolution picture of Victoria Crater (below) taken from the Mars Reconnaissance Orbiter. If you zoom in on the full resolution image, you can see the Opportunity rover's tracks and stopping points (faint lines with bright dots) around the left part of the rim.The photo was taken in July 2009, so many of Opportunity's tracks have already been obscured by wind and sand.

Topic by kelseymh   |  last reply

### Self-Balancing-Unicycle

Hey everyone, I need some help for my project paper. I want to build a self-balancing "one wheel". But I dont know where I can buy a wheel hub motor. I searched on Alibaba and found some fitting ones. A 800W 48V DC Brushless (Wheel Hub-) Motor. But i don´t know which speed motor control is the best for this type of motor. I want to use an arduino uno ! Can someone please Help me finding a motor control ? Thanks a lot :) PS: Sorry for my bad english :) I am german

Topic by Lucafaeth

### Can I make a 3d scan using a dslr

Can I make a dslr to scan multiple people at the same time?what do I have to do?  if so, what are the precaucions I have to do?

Topic by DIAGONALLIS   |  last reply

Hi, my name is david. im working on a project, for a device that is roughly .25-.5 inches long. im trying to find the right material resistance wire for the application. the components are submerged in coolant to maintain a low temperature. i wish to have a resistance wire of some kind wrapped around the components to heat them to about 90 degrees as quickly as a possibly can, for only a brief time(fractions of a second) i am using a variable power supply to determine my power needs. im hoping to be able to send a quick "signal" through the resistance wire, and use heat as a sort of input/output system. the internal components will melt at temperatures above 100 degrees.  so regulating the temperatures is key.  now obviously since they will be submerged in coolant, the resistance wire will need to heat to higher temperatures in order to heat the other components. ive been doing some research on nichrome and kanthal wire. but from what ive seen so far, it almost heats up to quickly, to higher temperatures than i require. it is hard for me to do the calculations, since i dont know how many watts/amps etc i will be using.  so to recap: temperature required about 90 degrees. (as quickly as possible, "flash heating" to 90degrees would be great) length is .25-.5 inch (the size will actualy be determined by the resistance wire i would prefer it to be as small as possible but i could make the module larger if i have to) variable power supply to determine my power needs(preferably the lowest possible power usage to conserve battery power) any suggestions on an appropriate material would be appreciated. i dont mind testing out different materials. i just dont want to spend thousands of dollars buying a little bit of everything and testing each one out one at a time. >< some experiments have suggesting silver coated nylon, but requires 20watts and a pretty sizable heating time. the heating coil will most likely have direct contact with the components, unless it is required to provide space between the coil and the components to heat it appropriately. i would prefer direct contact though to make the modules as compact as possible. currently the coolant is being pumped continuously through the whole system, but ive been working on plans for a valve to interupt the flow of the coolant during cycles where the coil is activated, if the need arises to keep the coolant from preventing the resistance wire from heating up appropriately.

Topic by DavidW433   |  last reply

### I want to print some gears, but I dont know how to make them

So I'd really like to make some geared mechanisms to be printed out, but the math is a little bit beyond me. Right now I have 123D and it does not have a gear generator. I was thinking that somewhere there has to exist a catalog or database of pre-designed gear stl files. I was hoping that somebody here might know of such a thing, or perhaps another way to easily make gears? I've been seeing all kinds of crazy gears made into really exotic shapes, but I don't know how these are made either. I'm assuming that the people that designed them are super geniuses, or that they have some kind of advanced software. Which is it?

Topic by Tomdf   |  last reply

The winter is on it way. I'm having a hamster, a winter white, but the last winter his caught cold and it cost very much for him to cure him. I don't want my hamster to be sicked any more, so I made a heating pad for him. I used this instructable  https://www.instructables.com/id/DIY-heated-clothing/ and I found it is very well. I use a two - meter 26 - gauge wire, and it only result in a 0.15 ohm resistance. With an 1.5 v voltage, It work well and i need a 10a fuse to protect this circuits:) But last week it overheated and my hamster was burned, quite bad. I'm wondering if there is a solution to this. Would you mind giving me a circuit in which: - there is a thermistor to sense the temperature. - If the temperature is to high (30 celcius degrees ), it gives a relay some voltage and the relay breaks the heater circuits. - And it component should be popular, cause I'm a kid and don't have many time go round n' round to find them. Me and my hamster will very appreciate your kindness. Thanks all.

Topic by vietanisme   |  last reply

### what materials can be molded and have a semi hardfinsih?

I want to create 3d mold. sort of like how to use a clay. but i want a near to hard finish, may be a bit "acrylicy" or "plasticy". the point is something sturdy. FYI: other than epoxy... its ok for me if the material start out as liquid or something clayish-like material P.s. if possible.... cheap... can any one recommend something? =D

Topic by No-Shi-De   |  last reply

### Chmistry buffs: IR invisible ink?

Hey all science-type people, I've seen invisible ink pens and things for sale that contain ink that show up in infrared, instead of ultraviolet light.  That's really appealing to me for a number of project ideas because digital cameras pick up IR exteremely well (especially with their filter removed). The problem is I think I'm going to want a lot of it, and those dumb little pens are crazily expensive. So any of you chemistry buffs out there have a secret formula I could make?  I'd prefer something invisible in regular light, but hey, whatever you've got. :) Thanks in advance for your help, -Kurt

Topic by PS118   |  last reply

### Should I get outdoor or indoor roller skates?

Hi! Just rediscovered my love of roller skating, after 15 years away from it. I am wondering if I should buy a pair of outdoor skates and use them on rinks sometimes, or rink skates and risk them outdoors? I'd check the wheels for rocks before I rode on the rinks, of course. I've never done outdoor riding, but I can't go to the rink all the time, and I'd like to work this into my daily exercise. I'd also like to get into good enough shape to join Portland's active Roller Derby scene. Thoughts?

Topic by mousewrites   |  last reply

### Advice needed - DIY off-grid solar electrics DC charging via AC from generator

Hi all, new to this forum... I'm looking for some advice regarding an off-grid electrics setup i'm running. Currently i have a PV solar panel charging a battery bank through a charge controller. It's a 12vdc system. For 240vac i use a small (500W) inverter. For larger loads i use a diesel generator. The inverter is basic but very high quality sine wave, it doesn't do any charging nor does it automatically switch the load between the AC of the generator and its own AC (i do this manually). In order to recharge my batteries when there isnt enough sun (which is often!), i use a simple AC powered charger that isnt specifically designed for off-grid/solar applications. In other words it is not "intelligent" and doesnt have bulk, float or equalization settings - it's just a DC charger that gives decreasing current as the voltage of the batteries rises. In fact it is very prone to overcharging if left charging for too long and will keep putting current into the batteries even after they've reached 15.5vdc or more. My question is this: is it a good idea to feed the DC charging current from my AC-fed charger into my solar charge controller in order to allow the charge controller to regulate and/or limit the charge as appropriate? I did this for a period of time and it seemed not to cause any problems. However, my AC charger did eventually blow its recrifying diodes although i'm not sure if this was due to a separate issue with the AC power coming from my generator which at the time was an old one and may not have been giving proper AC voltage (it may have been low due to engine speed problems). The solar charge controller is a PWM type. The way i had it set up was the DC from the solar panel and the DC from the charger in parallel to the charge controller. If there is no difference between the DC from the charger and the DC from the solar panel, i don't see how there could be any problem as it amounts to the same thing as having two 12v PV panels in parellel. However, what i dont know (due to insufficient technical knowledge) is whether rectified DC is any different to the DC from a solar panel. My setup is as follows: 1 x 200W 12vdc PV panel 60A tristar PWM solar charge controller 2 x 6vdc Trojan t105 batteries wired in series to give 12vdc Mastervolt 500w pure sine wave inverter (12vdc in, 240vAC out) SDMO 6kva diesel generator (240vAC) Wolf Max 50 battery charger (AC powered 40A DC charger)

Topic by RionZion   |  last reply

### tweaking engine output on an 1980 Suzuki FZ50 moped. suggestions pls

I run on a daily basis a Suzuki FZ50 moped from 1980. its a good little run about but i wish its little 8hp 49cc two stroke engine had abit more output. Ive just bought a carb jet kit with larger jets but i haven't fitted them as yet.  the little bike is in its original state and hasn't been modified. there seems to be many knew and used parts to buy on ebay for this model bike and  I would like to make some modifications to it myself as it tends to be slow riding up hills. I want to ask. have you owned this model moped in the past. can you make suggestions to what i can do to up the engine output. thanks for replies in advance.

Topic by selectauto   |  last reply

### Contest offering a LIX 3D pen - a no show for thousands of backers for last 2 years !

How odd to find a contest (https://www.instructables.com/contest/firsttimeauthor/) offering a LIX 3D Pen as a prize when thousands of backers on their KickStarter campaign are still waiting to get theirs after some two years of run around and non-delivery of the paid for rewards, very same 3D Pen. Insctructables might want to retract LIX as a sponsor given they have not been able to deliver their product to thousands of individuals over last two years.  They cercainly have not earned any (free) advertisement from anyone. Go check the comments at the KickStarter's campaign :  https://www.kickstarter.com/projects/lix3d/lix-the-smallest-3d-printing-pen-in-the-world

Topic by SergeE   |  last reply

### Something of interest for kids who have an interest in inventing and outer space.

NASA is holding a sort of contest for kids in grades K-12 to design a specifically-sized 3D-printable device that astronauts can use in the International Space Station. I figured it may be of interest to people here. I would participate myself but I am just a little over the maximum grade threshold. Info here. Good luck! -Nerfrocketeer

Topic by nerfrocketeer   |  last reply

### How to de-hybrid a Prius to run as a conventional car: Is it possible?

Any idea how to de-hybrid a Prius? Convert it to run as a gasoline only vehicle. From what I've read you have to: 1. Rig up a reverse. 2. Have enough battery power to turn the engine over. 3. Recharge that battery while the car is running. Has anyone done this? Know anyone who has? Have any ideas on how to accomplish this?

Topic by Lokisgodhi   |  last reply

I have 4.4 ÃÂµCi of Americium 241. Anything fun i can do with it? can i generate light or electricity or make it do something?

Topic by LinuxH4x0r   |  last reply

### Coil + magnet = power source

People, I need your help! I'm a student at college and my primer subject is physics. Let's just say I know enough about electricity and power. But my major obstacle towards constructing stuff is electronics. I have only just scratched the surface of it. I want to make a power source out of a coil and a magnet inside (electrical induction). Can anyone point out how exactly to build the thing? My desired output voltage is about 5V, or sth. I'll use it for electronics, so the amperage doesn't really matter. I would also like to see a circuit that converts AC to DC, cause the coil will give out only AC and that's not good. Thanks in advance!

Topic by 5ar   |  last reply

### 3D Printing layers separating

Hi! I have a project going with a 3D printer. Is a 4" X 4" X 10"  square enclosure used for holding electronics in an ROV. Whats happening is that the plies are separating. Not a good thing for an underwater vehicle. Has anyone experienced this with a larger 3D printed object? Will upload a pic when I get to my home computer.

Topic by spiderbear   |  last reply

### How to make a 3D soft silicone iPhone 4S/5 case?

I was wondering if its possible to make a soft silicone iPhone 4S case at home? And how? What products would I use? I have a idea so it would look something like these. Thanks!!!!!!! ðÂÂÂ

Topic by Dorthydrinkahwater   |  last reply

### UPDATE: CDROM stepper motor moves up and down now! wiggle problem resolved

To anyone who read my previous post about the CDROM stepper motor wiggling and not moving while being controlled by GRBL and the EasyDriver motor controller, I got that same motor to work. What I did was I completely took off the wiring system of jumpers I had made. I took off the male pins and kept only that. Then, I tinned four new 22 AWG stranded wire (which is a larger gauge than I was using previously), attached the male pins to one end, and soldered the other ends to the motor directly using copious amounts of flux and verifying resistance continuity between all wires and connections. My Take Away: A. The previous gauge wire was too small, B. My splicing of the wire failed miserably, C. The solder pins were in fact touching each other, shorting the system I am guessing that a combo of all three (honestly, mainly B) caused the frustration. Now it is one solid wire from motor to breadboard for each of the four connections. I believe by unsoldering everything and cleaning it up fixed the wiggle jiggle of the CDrom motor. So if you are having these problems with your CDrom motor/ motor controller, check the wiring and the solder joints. I hope this helps anyone having these problems.

Topic by dankozi713

### Space power plant

International project. Space station. Geostationary earth orbit. Solar energy flow. Microwave oven generator of big power. Transfer to Earth of energy in the form of a beam (microwave oven beam, microwave oven energy). Geographical point for reception of a beam - the desert. On Earth of the microwave oven energy will be transformed to electric energy. It is offered to discuss this project!

### CDROM stepper motor problem with movement

I have been having intermittent problems with my cdrom stepper motor. I had a four pin motor soldered to a bare copper wire. I used the pins not the little ribbon cable and I left the ribbon cable attached because I figured, as soon as I snip it off I would regret it later. The other end connects to a breadboard that is in line with the stepper input to the EasyDriver motor controller. I have been using GRBL controller on my PC and when I tested it the first time in a vertical position it would just wobble around, not moving up nor down. I thought the stepper motor was bad so I got another one. The second was wired the same way, 4-pins, and it worked in the vertical no problem. Then later, while working on the rest of my project the second cdrom motor that was working did that same wiggle without moving up or down. I realized that the solder connections were very close together and that two pins were electrically connected. I modified the wire to basically a homemade male to male jumper wire. The extra pin made the room I needed to unsolder the two pins. Once again the motor worked up and down with no wobble. I have done nothing to modify the cdrom stepper any further and went to test my motor today after a couple weeks hiatus and once again, wobble with no up nor down motion. At this point I am stumped. I have reason to believe that my solder skills are lacking and that my homemade jumper has broken internally inside my shrink tubing where I cannot immediately see it but If anyone else has had this problem and knows how to rectify it please let me know. I hope there is enough info here laying out my problem and that someone can lead me in the right direction. If it also helps, I have checked my pin out and I do not feel it is backwards or crossed. I checked the resistance between the four pins and the end of my "jumper" and is approximately, 40, 20, 40, 100 ohms for A-, A+, B-, B+, respectively. I am really not sure what these number would mean but my buddy told me to check the continuity from end to end.

Topic by dankozi713   |  last reply

### Propane in air compressor hose

Does anyone know how a regular (150psi rated) air hose will stand up to propane? I'm curious as to whether it would dissolve it.

Topic by Hegemone   |  last reply

### Ask : can i turn a motor from a fan to a generator ?

I have a motor taken from a fan ( picture ) i want turn it into a generator. Can i do that ? My teacher said that the motor taken from a fan could not be turned into a generator. And if it is possible, how to do that ? thank you a lot

Topic by Phờ roenP   |  last reply

### wireless turnsignals

How would I design wireless turnsignals for my antique car that has not turnsignals?

Topic by tim54889   |  last reply

### freewheel for micro scooter wheels

Is it possible to make or source some kind of freewheel and sprocket device for a wheel of around 80 - 100mm diameter? i've googled a bit and found micro folding bikes with similar sized wheels but i haven't found replacement parts listed for them, the closest thing i have found is parts for rockboard scooters but rear wheel assemblies cost \$80 each which seems a bit steep...

Topic by ambientvoid

### Searching for CAN-BUS overview for VW vehicles

Hello, I want to start hacking my VW CAN-Bus. In detail, i want to sniff some vehicle data (RPM, Indicator status, gear status etc.) For that I want to use an Arduino or RPI with a MCP2515 module. Is there an overview which shows all available identifier for vw vehicles  build <2010? Best regards

Topic by julianpe   |  last reply

### Jump Box

While the autoparts place was testing my battery(projected to take 1.5 hrs) I drove home with just the emergency jump box running the system. Probably not factory recommended for long durations, but it was just a mile or 2. What's the worst that could happen?

Topic by Toga_Dan   |  last reply

### How to grow a crystals with gypsum and other materials?

Dear: Instructables Just to let you know I am limited to materials in my house. I want to grow a crystal with plaster like plaster of Paris but I am running into a few problems. I know that Gypsum or plaster of Paris is already a crystal but it doesn't have the necessary hardness I want. I want It to have a hardness of a minimum of 6 on the Mohs's scale. I also am limited to chemistry knowledge. I've been trying all day to design a crystal with the specifications I want but I've been having trouble trying to draw a Lewis dot diagram for plaster of Paris. I am not that good at drawing Lewis dot diagrams unfortunately. Here are some materials in my house I think I could use to incorporate with the homemade crystals. Acetone Potassium Chloride Sugar Baking Soda Potassium Nitrate and more... Can I have some help please? Thank you. From: Noah

Topic by nschreiber0813   |  last reply

### battery requirments

Hi, I am currently using 2x 6v 1.3 AH SLA batteries to power a 3w LED globe. will these batteries be ok to power this LED for around about 1 hour or will this be pushing it.

Topic by BrianW109   |  last reply

### Modifying STL's

I am looking for a cheap, preferably free, program or suggested work flow to make changes or additions to a STL. The particular interest right now is a small mouse that I download from Thingiverse that I'd like to add a block letter to. Something I'm trying to do for an event at my dog club. I want to print it in green with a block "Q" on its rump. I have windows 7 and 8.1 along with Linux Mint and will soon have an Afinia printer. Thanks in advance for any pointers, Curt

Topic by CurtWG   |  last reply

### PLASTIC BOTTLE AND DC MOTOR CAR

My car is not moving forward. Can someone help me with the error I might have made. I am using a 100ml pet bottle, DC motor, 9 V battery and a fan . The steps GIVEN  are very clear yet thr is something I missed. Pls help

Topic by MonaG5   |  last reply

### Simple CNC

Does anyone have any information about the three programs, Simple CNC, Simple Art and Simple Engrave. I went to the website, and there is an order page, but the contacts and support buttons are dead.  There is no way to get in contact with them. Before I checked this I actually ordered Simple Engrave and was told I would receive an invitation to the CNC forum.  But I have not received the invitation and have no way to contact.  And of course, no program since it has to be downloaded from the forum. Should I just start a grievance with Paypal?

Topic by yrralguthrie   |  last reply

I want to make this https://www.youtube.com/watch?v=Ft39Rdp_53w  Micro motor for my indoor plane, Anyone know how to make ?

Topic by DamienP7   |  last reply

### 3d Tutorial: Model A Sacred Merkaba For 3D Printing

In this quick tutorial, we model what is known as a Sacred Merkaba for 3d printing or digital asset design.  Symbolic of ancient spirituality and mysticism, this shape has been part of religious iconography for thousands of years.  Geometers and mathematicians recognize it as a Stellated Octahedron, or Star Tetrahedron.  I'm using 3dsmax 2012 for this example, but the techniques can be translated to any capable polygonal modeling package. 3dsmax: Blender 3D:

Topic by JohnM440   |  last reply

### Obtaining helical slices from a 3D model

Hey guys, I've begun to work on a volumetric display for a school project like the one in the link at the bottom of this post but I can't figure out a good way to obtain helical slices of the 3D model which I intend to project. I could do it manually by subtracting the "negative" of the helical screen from my model in Solidworks and then take a screen shot, but this would be pretty time intensive since I would need 360 shots(360 2D images from below the model with the screen negative rotated one degree each time). Is there any program out there or add-on for solidworks which could automate this process? Or even a functionality in solidworks that I haven't thought of? Would appreciate any advice you have on this subject. Link To Helical Volumetric Display Video: https://www.youtube.com/watch?v=ihZ_mJ04U3c

Topic by Pyrowuzzup

### Indoor Plant Lighting Solution Needed

I'm planning on making a Instructable for the Indoor Gardening Contest, I was wondering whether normal LED lights will serve the purpose of mimicking sunlight OR power optimal/decent photosynthesis. I have normal white & blue led lights. Will they do?| If normal LED's won't work? Which lights should I use?

Topic by Jonathanrjpereira   |  last reply

### What is the melting point of molded plastic epoxy ?

Hello. I would like to know what is the melting point for most integrative circuits epoxy molded plastics ? The kind of plastic I am talking about would be the ones used for BGA chips found in smart phone IC's (integrative circuits). I would think that a decent powerful household kitchen microwave should have enough power to melt this type of epoxy material used for BGA IC's. I would like to de-cap the BGA. PLEASE note that I will be using a cheap throw away kitchen microwave to melt the IC and the BGA is not important even if the heat generated damages the die layers made of silicon. This is strictly for hobby purposes. The same question but does anyone know what kind of metal is the bottom part (the tiny metal circles ie solder balls) of a BGA IC made from ?

Topic by victor43   |  last reply

### Is there an easy way to find a short or open circuit in a car?

I am trying to find a open or short circuit that is on a wire which is in a harness with other wires, on a 1986 Mazda B2000 truck. With so many of you having expertise in electronics, I thought here would be a good place to post my question. Does anyone have any suggestions how to find this open or short-circuit?I am open to the idea of getting a short-circuit-finder. Though I am not sure what features I should look for if I decide to get one. Does anyone have any suggestions?a) Does anyone know if these work well?b) What features should I look for If I get one?c) Do you have any other on a short circuit finder? type, manufacturer, model etcBelow is a link to a site that uses a short circuit finder to find a short circuit, and has information on using one: http://inliners.org/tech/tech6.htmlBelow is a link to a site that tells about how a tone generator is used to find a short circuit, in a home environment (I think this is how most short circuit finders work): http://askville.amazon.com/tone-gene...uestId=5912724I found some links that seem to show that it is possible to make a signal generator and tracer, but the pages with the schematics would not load. A list of tools with links to tools and their schematicshttp://www.qsl.net/kc4gzx/kc4gzx/project20.htmCircuit tracer (neither of these would not load 4-3-09 kept getting message "the Connection was reset."):should have schematic:http://circuitos.tripod.cl/schem/r111.gifand the signal generator:http://circuitos.tripod.cl/schem/r25.gifA little paranoid voice thinks this Instructable has some clues to the solution: How to prevent thefts steal your motorcycle for less than US\$ 2 Thank-you in advance,

Topic by Jonque   |  last reply

### HOW CAN I MAKE THE FEBER DAREWAY SCOOTERS FASTER FOR MY BOYS?

We are in Houston, TX if someone knows of a technician that can do this for me before Christmas that would be great.

Topic by QuenchelleN   |  last reply

### Plastics in the Automotive Industry

This isn't an in-depth tech article or anything but it's interesting to realize just how much the auto industry runs on plastic: http://www.paxonplastic.com/the-automotive-industry-welcomes-a-plastic-future/ I even read that a 3d printed car might be hitting the market as early as the end of this year. Not sure if that's just a rumor but it doesn't seem far off.

Topic by PlasticPanama   |  last reply

### Pancake Coil

Hello, I was going to try building an old Tesla "Pancake" Coil, and then write an instructable for it. (please don't steal my idea!) Does anyone have any information or building techniques at all that they can give me to help? The Pancake coil is just a Tesla Coil that has a flat secondary, as well as a flat primary. Tesla used it in his early radio and wireless power transmission research. The primary circuit should be pretty much the same as a conventional Tesla Coil. But I am a bit confused as to how to build the secondary. A few questions I have: What wire gauge should I use (I'm pretty sure that Tesla didn't use magnet wire for this)? How do I determine the space in between the turns? (more to come) I realize that most people don't build these kinds of coils anymore, and therefore most people probably won't be able to answer my questions or give me any info; I'd just thought that I would try and see if any one could. It would help me a lot. Thank you.

Topic by ElectricUmbrella   |  last reply

### How to measure distance with a contact microphone?

Hey, I`m trying to create a project about echolocation, so, I´m gonna use contact microphones, give me some ideas mates. PLEASE

Topic by JoséG100   |  last reply

### Wich sensor should I use to create a project about ecolocation?

I´m doing a sonar but I wonder wich sensor to use?

Topic by JoséG100   |  last reply

### Echo Location / Arduino / Michropones

Hello guys, So, I´d aprecciate if you could give me any ideas about echo location using microphones or ultrasound detectors, the idea is to put three or four sound detectors and put any object in the middle so that way because of the sound I could know where the object is, by using the detectors

Topic by JoséG100   |  last reply