All I need is power

As long as the power requirement is low you could perhaps make a small rotary transformer? A bit more involved than a slip-ring, though.

 

What is the actual Dia of the nipple ?
Max.

Diameter 4.9 mm. Height ~2.8mm

Sleeve diameter 12,5nn. Sleeve height ~21 mm

 

As long as the power requirement is low you could perhaps make a small rotary transformer? A bit more involved than a slip-ring, though.

Thought of in another thread but I would rather go with ehe slip ring if I can. I lot more straight forward to transfer data,

 

Diameter 4.9 mm. Height ~2.8mm

Sleeve diameter 12,5nn. Sleeve height ~21 mm

Are you sure that is mm and not Cm? 4.9mm = ~ 3/16"
Max.

 

Are you sure that is mm and not Cm? 4.9mm = ~ 3/16"
Max.

mm I told it was tiny.

 

I am toying with the idea of creating my own slip rings. What about bearing s placed over a shaft? Wires would be soldered to inside and outside ring. The shaft would need to be make of an insulating material or have an insulator placed between bearing and shaft.

 

All I need is power. I also plan to have a shift register on the spinning board that will tun on and off LEDs. I really haven't figured out the frequency yet but should be fairly low. Certainly under what the shift register could handle.

When you first posted about building this i didn't know how they worked so did some research. The one good (I thought) build had a lot of basic information on the things that seem to be needed. When you said "frequency" were you meaning, the disk RPM? According to that guy 3600RPM was the right speed.

Here is the link, maybe it will give you some ideas. http://www.pyroelectro.com/projects/pyro_propeller_clock_pov/

 

When you first posted about building this i didn't know how they worked so did some research. The one good (I thought) build had a lot of basic information on the things that seem to be needed. When you said "frequency" were you meaning, the disk RPM? According to that guy 3600RPM was the right speed.

Here is the link, maybe it will give you some ideas. http://www.pyroelectro.com/projects/pyro_propeller_clock_pov/

No frequency I meant data transfer. I need to do the math but I would need to divide the circle up into a number of "slots". I would need to transmit 8-10 bits in the time it is in the slot.


But I would rather not get mired down in the actual working of the clock. Just concentrate on how i can power and transmit data to the spinning board.

 

I am toying with the idea of creating my own slip rings. What about bearing s placed over a shaft? Wires would be soldered to inside and outside ring. The shaft would need to be make of an insulating material or have an insulator placed between bearing and shaft.

Hey! ... that was my suggestion ...

 

Hey! ... that was my suggestion ...

I assume there is conductivity between outer ring and inner ring?

Any thoughts on an insulator placing the bearings on an aluminum tube? I was thinking painting the aluminum with not conductive paint but I would be concerned about scratching the shaft when placing the bearings.

 

I assume there is conductivity between outer ring and inner ring?

Any thoughts on an insulator placing the bearings on an aluminum tube? I was thinking painting the aluminum with not conductive paint but I would be concerned about scratching the shaft when placing the bearings.

Yeah, you could cut a piece of sheet plastic and wrap it around the shaft, or you could also use shrink wrap

 

Yeah, you could cut a piece of sheet plastic and wrap it around the shaft, or you could also use shrink wrap

My concern with that is matching the size of the bearing with the size of the tube. Adding that extra material might make the job difficult.

 

Yeah, you could cut a piece of sheet plastic and wrap it around the shaft, or you could also use shrink wrap

Is he trying to generate voltage? Why not just put a Toroid and some magnets, as the outer turns with the magnets the Toroid puts the voltage out to his LED's. Unless he's trying to be discrete minimizing things so you can't see how the voltage is being created. I'm confused

kv

 

Been a few years but I did quite a bit using nylon material from McMaster Carr Supply. You could buy nylon in about any shape you could want. You could also drill and tap the stuff as well as use nylon screws and nuts for mounting boards on it.

Ron

 

Been a few years but I did quite a bit using nylon material from McMaster Carr Supply. You could buy nylon in about any shape you could want. You could also drill and tap the stuff as well as use nylon screws and nuts for mounting boards on it.

Ron

In your opinion how thick should I go with nylon? I would think the shaft would not be more than 5-6 inches long.

Roller skate bearings are pretty popular and cheap. The are 8mm inside.
https://www.ebay.com/itm/20-Ball-Be...850688&hash=item1c9653d6fd:g:1BkAAOSw4CFYwKlO

Would 8mm be thick enough to prevent sagging or bending? I do plan to set the bearings in a wooden block or two.


Edit: I am thinking of going with a tube, that way I can run the wires inside the tube.

 

Perhaps it's time to consider adding a miniature lathe to your tool collection?

 

Perhaps it's time to consider adding a miniature lathe to your tool collection?

And maybe I could hire someone that has the skill to use it.

 

So to answer my question. I assume there is connectivity between the outside and inside rings of the roller bearings? Is it reliable enough for data? I.E no interruptions in connectivity?

 

So to answer my question. I assume there is connectivity between the outside and inside rings of the roller bearings? Is it reliable enough for data? I.E no interruptions in connectivity?

There will be interruptions, most definitely. The bearing's internal lubricants will cause intermittent contact, which is something easily fixed if what you're trying to do is transmit power, but not if you're trying to perform serial communication, for instance.

 

There will be interruptions, most definitely. The bearing's internal lubricants will cause intermittent contact, which is something easily fixed if what you're trying to do is transmit power, but not if you're trying to perform serial communication, for instance.

What I suspected but not what I wanted to hear. I wonder if I wouldn't have issues with interruption of data with my store bought slip ring too??