[Lab] Cable Recommendations

[Aurelius R]

I was about to say -- 500MHz?!?! Are you insane?!? lol. I couldn't generate
a PWM that high with the best DAC and ARM processor I have!

____________________
Peace, Love, Empathy

Alexander Max Rowsell


On 14 January 2014 19:22, Kirk Sutherland <kirk.sutherland at gmail.com> wrote:

> And by 500Mhz I of course mean 500 multiple Hz :D
> (Thanks Richard!)
> On Jan 14, 2014 4:31 PM, "Kirk Sutherland" <kirk.sutherland at gmail.com>
> wrote:
>
>> 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
>> tonight.
>>
>> Any other thoughts?
>> Thanks again!
>> Kirk
>>
>> 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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>>
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