Author Topic: My Scratch Pad  (Read 92097 times)

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Offline MadScientist267

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Re: My Scratch Pad
« Reply #495 on: July 16, 2017, 03:00:09 pm »
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Offline MadScientist267

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Re: My Scratch Pad
« Reply #496 on: July 16, 2017, 05:50:05 pm »
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Re: My Scratch Pad
« Reply #497 on: July 17, 2017, 01:15:48 am »
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Couple of bumps in the rearranging and pruning of the core for this thing, cleans up nice when you swing a hammer at it first ;D
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Offline bj

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Re: My Scratch Pad
« Reply #498 on: July 17, 2017, 07:22:05 am »
  Hammer works Steve.  Had good luck threatening with my 50 ton press as well. ;D
"Even a blind squirrel will find an acorn once in a while"
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Offline MadScientist267

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Re: My Scratch Pad
« Reply #499 on: July 17, 2017, 03:00:00 pm »
LOL Yeah... turned out this one needed some additional.. ahem convincing... but it's now been beaten back into submission, and is test driving one of two methods I want to try for handling an offset that showed up in the ammeter. Looks more promising than ever tho with each swing... I must have gotten it backwards for one of them and it didn't fancy the claw...? Lol

Getting there tho yep
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Re: My Scratch Pad
« Reply #500 on: July 27, 2017, 12:54:14 am »
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Offline MadScientist267

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Re: My Scratch Pad
« Reply #501 on: July 27, 2017, 01:13:26 am »
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Offline MadScientist267

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Re: My Scratch Pad
« Reply #502 on: July 27, 2017, 09:51:39 am »
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Re: My Scratch Pad
« Reply #503 on: August 10, 2017, 12:52:16 am »
I'm so confused! Lol

Card hanging from the inside of the door in the hotel bathroom...
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Right on the other side of the wall...
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(I double checked, it's "real")

Ok so, what exactly are we doing here again?  ??? :o ::)



[ Attachment Invalid Or Does Not Exist ]
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Offline bj

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Re: My Scratch Pad
« Reply #504 on: August 10, 2017, 06:12:46 am »
   At least some of us know that we are confused Steve.  The rest seem to think just saying
a few nice words is enough.  (mini rant)
   As an aside, you were staying in a hotel?  Hope all is well.
"Even a blind squirrel will find an acorn once in a while"
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Offline MadScientist267

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Re: My Scratch Pad
« Reply #505 on: October 06, 2017, 12:32:37 pm »
Some serious forward progress over the last couple days on the charger... sneak peek lol

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It's officially out of control (in a good way lol)... more as it comes
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Re: My Scratch Pad
« Reply #506 on: October 18, 2017, 07:38:44 pm »
A little something showing the ever increasing "midnite sun" value that high power LEDs have become (forgive the pun, for those of you that it jumps out at lol I couldn't resist)...  ;D

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Check out the little tiny red blip right at 2AM...

Then:

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Now I'm not gonna say there's "useful power" there... In fact, if anything, I'd call it a parasitic event, looking at the more sensitive battery monitoring voltage plots (causes MPPT relay to engage)...

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I'd have included the net current plot but there's nothing to see, it's a flat line.

And just to show that the temp isn't an "external event", here's the ambient lines. Note that the blip from engine heat comes *after* the bump in the classic temps...

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They keep this up, and I won't need the sun... just pull under a gas station canopy at night  8)

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Offline lighthunter

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Re: My Scratch Pad
« Reply #507 on: October 19, 2017, 06:09:07 pm »
You gotta be kidding, ive shined a 500w halogen at a panel before and output is very weak. Maybe you have some really good panels. Mine are always the .40c/w stuff without frames. Impressive, LED
 emitters are getting powerful no doubt about it but the frequency spectrum is pretty narrow maybe coincides with sensitivity of panel.

Thanks for the info
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Offline MadScientist267

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Re: My Scratch Pad
« Reply #508 on: October 19, 2017, 07:05:02 pm »
Yep. That's raw, from a trip to the pump under the canopy at 2AM... it sat there long enough to register on the graphs because I was topping up both the truck and genset, as well as my reserve tank, and got a bite to eat while I was inside.

It's certainly not "real power" in any sense of useful, but remember, PV is a current source not a voltage source, so it takes nearly nothing in terms of photons to make them saturate to Voc. The classic sees this rise, and mistakes it for dawn, and goes into bulk mode. The moment it attempts to draw power from them, the voltage falls back off, and it goes back into resting... where the cycle repeats.

The heat is most likely simply the processor in the classic coming out of sleep, and the board being surrounded by heatsink, some of it gets picked up on by the MOSFET probe.

There's probably a tiny amount of actual external energy involved in heating the MOSFETs up, as the reservoir caps discharge thru the converter, but it's hard to call it much more than minimal. The cycle takes a minute or so total to complete because of timers involved designed to prevent nuisance relay chatter.

I guess you could say it's more an amusing parlor trick than anything else, but it certainly illustrates that LED has gotten intense (and the ones at the station are certainly no exception lol) ;)
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Re: My Scratch Pad
« Reply #509 on: October 20, 2017, 04:53:39 pm »
Won't be long...  :-\

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