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Topic: Impedance matching 4ft of 20awg wire (Read 4030 times) previous topic - next topic

Boardburner2

#45
Apr 18, 2016, 10:19 pm Last Edit: Apr 18, 2016, 10:25 pm by Boardburner2
Ground and neutral are tied together at the panel by two ground rods and cold water pipe.

Cold water pipe is just to keep everything at the same potential for safety.
Unless your incoming water main is metal it improves nothing.

The presence of the two ground rods makes me think this is a rural rather than urban setting.
Possibly with overhead supply lines.
Can you say your geography. ?

Mark the strips are ran inside of aluminum Chanel that is glued with double sided 3m tape to metal flashing.


These strips can be used on roofs apparently , the architectural suppliers do exactly that.
Channel is of course earthed

Qdeathstar

#46
Apr 19, 2016, 12:36 am Last Edit: Apr 19, 2016, 12:43 am by Qdeathstar
Maybe I need to earth my channels, as they are not currently.

In the United States NEC code requires at least be ground rod (local requires two) and requires cold water ground. My pipes go into the earth as metal.

I have overhead lines at 120/240 but those are atleast 40ft away from my lights, and there are no transmission lines for atleast 100ft, those are probably 11kv (but I'm not sure)

My nuetral has zero potential to earth ground. I am certain of that.
A creaking creeping shadow
stiff against the freezing fog
glares at a tickless watch.

Time has failed him -- all things shall pass.

Boardburner2

As a kid i had a party telephone that used to occasionally go ding.

I discovered that nipping outside and having a wizz on the earth electrode solved the problem.

Maybe a hosepipe would help ?

Qdeathstar

hmm. well, I would try pissing on it, but as its mounted upside down splashback is a real concern... what type of goggle do you recommend for this type of work?






A creaking creeping shadow
stiff against the freezing fog
glares at a tickless watch.

Time has failed him -- all things shall pass.

Boardburner2

, but as its mounted upside down

Well there is your problem, its not an earth electrode, its a lightning conductor.  :)

Qdeathstar

Turns out the simplest solution was to slow the refresh rate down. I was unaware that FastLED had an option to slow the refresh speed to below 1mhz. I have slowed it down to 1khz and now it blinks maybe once every two days, but only at the last 20 or so pixels. I'm going to try to add a timer to only refresh the less once every 2 milliseconds. That should get me down to 500hz. I think that will completely solve the problem.

Thanks for all the advice though. This is a solution, but maybe not the solution. :D
A creaking creeping shadow
stiff against the freezing fog
glares at a tickless watch.

Time has failed him -- all things shall pass.

Boardburner2

#51
Apr 27, 2016, 12:40 am Last Edit: Apr 27, 2016, 12:42 am by Boardburner2
Glad you found an answer that worked .

Maybe your origional idea of the signal lines was the problem.
to slow the refresh speed to below 1mhz. I have slowed it down to 1khz and now it blinks maybe once every
Missed that i think the max speed for neopixels is 800 KHz

Qdeathstar

Yeah, neopixels are ws2812. Ws2801 is good for 4mhz, but that requires an almost perfect environment. In most environments it's 2mhz, and on a run like this which is actually out of spec (finding that out now) it needs to be turned way way down.
A creaking creeping shadow
stiff against the freezing fog
glares at a tickless watch.

Time has failed him -- all things shall pass.

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