Send power betwwen to moving parts?

Hey Guys

Long time since I wrote for the last time here, I don't have much time free lately I'm afraid.

Well, short question, I need to send 5 volts between two moving parts, like the famous "propeller clock" or like in a slot car.

What I'm trying to find is some nice rigid contacts to attach to a PCB, so they can slide over another PCB to transfer the 5 volts.

Like this:

http://www.youtube.com/watch?v=qlw6pFg-pvk

Hope it's clear what I'm trying to do. Any ideas or suggestions?

Thanks!

Daniel.

http://www.mill-max.com/pin_rec_catalog/search_results.cfm?part_description=Spring-Loaded Pin&pin_or_rec=pin&

http://www.mill-max.com/images/produ...lsize/0850.gif

Quote:

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Originally Posted by danielhr77

Hey Guys

Long time since I wrote for the last time here, I don't have much time free lately I'm afraid.

Well, short question, I need to send 5 volts between two moving parts, like the famous "propeller clock" or like in a slot car.

What I'm trying to find is some nice rigid contacts to attach to a PCB, so they can slide over another PCB to transfer the 5 volts.

Like this: . . .


Hope it's clear what I'm trying to do. Any ideas or suggestions?

Thanks!

Daniel.

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Hi Daniel,
Since your application is low power, I E Not several tens of amps, You might consider carbon brushes, I think Home Depot may sell them or LOWES as general purpose replacements for motors. A split ring commutator can be fashioned from copper tubing and epoxy and bruch holders from brass tubing and pc board.

Quote:

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Originally Posted by Archangel

Hi Daniel,
Since your application is low power, I E Not several tens of amps, You might consider carbon brushes, I think Home Depot may sell them or LOWES as general purpose replacements for motors.

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Whilst you can certainly use carbon brushes, they are typically used where high currents in the tens to hundreds of amps are required. A good example is the starter motor in a motor vehicle.

Quote:

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Originally Posted by rmteo

Whilst you can certainly use carbon brushes, they are typically used where high currents in the tens to hundreds of amps are required. A good example is the starter motor in a motor vehicle.

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Huh, I've never seen a straight carbon brush in a starter, seen a copper blend there, alternators however do use carbon brushes. The brushes I am refering to are very small round or square light motor brushes designed to handle less than 10 amps and are soft enough to run on a copper surface without destroying it . They have the desirable attribute of having a fine braided copper wire embedded so as to give you a way to energize them without adding another friction connection. Many also have an attached coil spring. Example from OSH http://www.osh.com/eng/product/dreme...rushes/6067128
or better, Grainger's
http://www.grainger.com/Grainger/wwg...FUvCtgodhk5KpA
Although the cheapest method might be to cannabalize a toy's motor.

Starter Motor Brushes
http://www.amazon.com/Ricks-Motorspo.../dp/B00230JUMY