Thilo Klein wrote:
> Dear readers,
>
> I want to design a slip ring system with concentric circles to
> transmit 7 signals(ie 8 connectors). Do thou know a source(I prefer
> books) which shows several methods of transmitting signals on rotating
> elements ?!
>
> Diameter of the outermost circle: 117 mm.
>
> Diameter of the innermost circle: 81 mm.
>
> Max voltage: 12V
>
> Max current: 1A
>
> The system is not very sensitive so there can be fluctuations(+- 0.2A,
> +- 1V).
>
> Regards
>
> Thilo Klein
>
>   
There are commercial slip ring assemblies, but they are VERY dear.

Personally, I believe one could design his own using custom beryllium 
copper stampings and a precious-metal
PCB with circular traces.

Good luck.

--Bob
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