[Lab] Cable Recommendations

Kirk Sutherland kirk.sutherland at gmail.com
Tue Jan 14 16:31:08 EST 2014

Hi Strake and Jim!
Thanks for the reply.

Strake - The switching freq for an Arduino PWM signal is about 500 MHz.

Jim - The idea of using cat5 (or 6) is very appealing as I have a lot of it
and it's cheap from Monoprice :) I have four conductors to worry about - a
+12 V line and three PWM grounds. To take advantage of the twisted pair in
the cat 5 would I put a +12 line and ground together? In effect use 3
twisted pair, 3 +12V and 3 PWM grounds?

On paper I am seeing I could be pushing 2.5 amps but I don't think this is
the case in reality as the PWM makes it much less - I will measure this

Any other thoughts?
Thanks again!

On Sun, Jan 12, 2014 at 12:28 AM, Jim Kiskis <jim.kiskis at gmail.com> wrote:

>  I have had good results using cat5 cable as it's somewhat shielded and
> the wires are twisted for signal protection
> Sent from my iPad
> On Jan 11, 2014, at 9:37 PM, Kirk Sutherland <kirk.sutherland at gmail.com>
> wrote:
>   Hi Modlabers,
> I was wondering if anyone here has experience with or knows if I need a
> special / shielded cable to run a 12V PWM signal about 20 - 30 feet. It
> will be driving an LED strip (2m of RGB 5050's). I have not done this
> before and was wondering if I could get away with something cheap like 4
> conductor telephone cable or if that will cause enough signal degradation
> that it could mess with the colours. The LED driving circuitry can't be
> closer, so that isn't an option.
> Any info would be great!
> Thanks,
> Kirk
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