Re: Color Kinetics

["galeforce9" <ian@xxxxxxx>]

Hi
Standard DMX is RS485.

The lights have a single blue wire for dmx data i/p. It is supposed 
to go to one of there controllers. The blue wire goes through a 33K 
Ohm resistor to one of the uP i/p pins with a 10K Ohm resistor to 0V.

It requires data i/p in the region of 0 to 12v minimum to switch it.
(I know I tried and 5V and it is not enough).

Thats why I thought if I could build a PIC circuit to interface to 
the lights (one unit would drive many lights) with a standard type 
of interface that we could all use and be very cheap.

If I have time tonight I'll try some more work on the interface & 
post were I get to. I know I could do a switch style interface, 
RS232 does work and it should be possible to do something similar to 
the other Ian's work to make them xAP if thats what people require.

Ian D



--- In ukha_d@y..., "Bricknell, Tony" <tony.bricknell@t...>
wrote:
> I'm sure I read somewhere that DMX is a communications protocol 
that uses
> RS485 as its physical communication standard.
> 
> Quick Google search brings up 
> http://www.lighteducation.com/article.php?sid=69
> which sort of explains it.
> 
> And RS485 is easily converted to RS232 (via MAXim chip or 
commercially
> available RS485-to-RS232 adapter) so presumably all you need to do
is get
> your RS232 data in DMX format to the serial port...?
> 
> 
> -----Original Message-----
> From: Jon Payne [mailto:jgpayne@b...]
> Sent: 07 October, 2002 12:11
> To: ukha_d@xxxxxxx
> Subject: Re: [ukha_d] Color Kinetics
> 
> 
> I'd really like RS232... 
> 
> Cheers,
> Jon.



http://www.automatedhome.co.uk
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