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There are so many different styles of primary though like using copper pipe and how it's spaced, flat or conical etc. Also I haven't seen a set number of turns for either primary or secondary. I assume this is because NST output varies by unit but for a given output it would seem there is an...

Any good guides out there? I have looked at a few but they seem to vary widely. Also looking at videos it seems that the results vary widely as well. If I am going to do it I am going to do it right. Also any pics of yours that you might want to share feel free!

So my roommate works construction and picked up this baby during a demo for free! The obvious projects came to mind...Jacob's ladder, tesla coil. Any other ideas? I am leaning towards the tesla but I have only lightly researched the topic and it seems quite finicky to get right. Also I know...

After talking with FireMyLaser who inspired this project I will be putting as little as possible in the sphere. I would rather make more slip rings than add weight. I am also reducing it to 3 arms and leds instead of 4. I underestimated the gyroscopic forces at play so the arduino will most...

I will try to gear the top axis motor as low as I can while still getting enough speed to keep up the torque and keep the cross as light as possible. I will mount the bearing in the cross instead of the supports so that I don't add the steal rod to the rotating mass. I think my biggest problem...

Yeah I understand that. Theres a great video of an old man lifting a big spinning weight over his head. He has it on the end of a shaft and swings it around him. The gyroscopic effect causes it to rise almost effortlessly even though it's like 50lbs or something. I guess I just don't know how...

You are right. I am thinking of when you apply a force how it wants to turn. This is interesting. I considered this a bit but maybe not enough. So when you turn the bottom axis you found that it throws off the top? As in slows it down right?

That could be but this it much lighter than a bike wheel. I don't expect super high speed on the main axis but the top should whip around pretty good with a racing rc motor. You may be right that it won't hold up...I will find out I guess. As long as I spin the main axis with the natural...

First I want to give credit where credit is due. This project was inspired by FireMyLaser's led ball build. http://laserpointerforums.com/f57/led-orb-2-0-a-50012.html His project is awesome and in the spirit of innovation I wanted to give it a try with a few tweaks! Project Concentric...

This is all great info thanks! Pyro: are you suggesting even the arduino? That's an interesting idea as I would just need to send in power but that adds a lot to the spinning mass. The other issue is that the arduino will also control the motors which are further back in the system, so I would...

How would I know? I may build the drivers myself but I have considered just trying to find some adjustable drivers on ebay. The trouble is that often this information is no where to be found. Would I have to look for a trace that leads directly from the input to the output of the driver? Is...

I will have to look into continuous ground drivers. Thanks I thought about wiring the drivers after the slip rings, but there are two problems. 1. This will be turning extremely fast so I am trying to keep the weight down so it doesn't tear itself apart. 2. I was hoping to control the drivers...

All of my electrical know how is self taught and I dont think that this will work but I am trying to figure out a solution. I need to be able to turn on 4 LEDs separately but I need to run them through 2 slip rings. To save myself from having to make what would be 16 slip rings for just these...

You sir are correct! I actually drew it out on paper and then it became obvious. Thanks for the reply. Beam is all focused and beautiful. Not as tight as I hoped but the hid spills a lot out the front where as the halogen is dipped to block that light. Overall I'm very happy. Ive never seen so...

Yeah I get that and I've tried several depths but with its large spot size and since it requires dissambly to adjust its not as straightforward as a laser. Its also the wrong bulb because the h4 100W hid bulbs are 4 times as expensive has the h1 bulbs. My retrofit works but I don't know if its...

I put a 100W HID kit in a Cyclops Thor Colossus spotlight. The spotlight has a HUGE reflector but I'm not getting the throw I want. I've tried adjusting the bulb in and out but can't find the sweet spot. I have noticed that the beam has a bit of a focal point. If the light is focused inward to...

I just tested it and it does indeed fire up! I only ran it for maybe 45 seconds so I don't know run times but I'm pleased it starts up just fine. Thanks all

I wouldnt talk sales in a discussion forum. I am also a bit curious as to what component you are going to measure resistance (ohms) of?

If you are talking about using two non rechargeable cr123a batteries (the cr vs rcr branding is all over the board for these) then the answer is probably. It depends on the driver specifications. It is certainly a buck style driver and should be able to work with 6v. You do want to ask...

Gotchya. Well I will try it and if it sucks I do have 20 LiFePO4 18650 cells laying around I could play with. Need to charge the pack somehow though without breaking the bank. Thanks