DECmate II -> VR201 cable?
Wai-Sun Chia
waisun.chia at gmail.com
Thu May 26 21:35:59 CDT 2005
On 5/27/05, Tony Duell <ard at p850ug1.demon.co.uk> wrote:
> >
> > Hmmm...is the BCC02 a 15-15 straight cable?
> > If so then I can whip one up myself instead of paying 20 bucks to a dealer...
>
> Yes, but you really want to use 75 Ohm coax for the video signal. You
> also don't need to wire all the pins.
>
> Accordign to my VR201 schematic, the pins used are :
>
> 4,5,6 Ground (and shield of the coax)
> 7,8 +12V (power for the monitor and keyboard)
> 12 : Composite video
> 13 : Ground
> 14 : Data from keyboard
> 15 : Data to keyboard
>
>
> Keyboard data is at RS232-ish levels, the power is fused inside the
> monitor at 2.5A, but the keyboard is fed on the CPU side of this fuse. So
> make sure you use think enough wire!
>
This looks like I'm going to have to tack at least 3 types of cables together?
1. Regular 3-core (perhaps 26 to 28 gauge?) for the data (14,15) and ground (13)
2. Coax for video (12) and ground (4/5/6) and shield
3. Thicker core for power (7,8) and ground (4/5/6)
And probably sheath the entire conflagaration in shrink tubing?
/wai-sun
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