Mau5Capades: builds & grow journal

PurpleBuz said:
pins whether passive or active cooled win hands down.

In ad hoc testing I did recently I found the pins to allow better conduction of the heat from the base plate to the tip of the pin with a smaller amount of metal compared to fins. thin fins better dispersion, but lower conduction. thick fins for better conduction use a lot of metal.

Also found that air flow with sparse pins has lower resistance than fins and staggering the pins causes turbulence that increases air contact giving a heat dispersion better than fins.
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Nice summary. These would work especially well vertically, taking advantage of the convective current created by the warmed air itself rising and pulling more in beneath.
 
PurpleBuz said:
pins whether passive or active cooled win hands down.

In ad hoc testing I did recently I found the pins to allow better conduction of the heat from the base plate to the tip of the pin with a smaller amount of metal compared to fins. thin fins better dispersion, but lower conduction. thick fins for better conduction use a lot of metal.

Also found that air flow with sparse pins has lower resistance than fins and staggering the pins causes turbulence that increases air contact giving a heat dispersion better than fins.
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that's consistent with my findings as well. I just did a side by side controlled test : 4 cutter pins vs 36" 5.886 heatsinkusa profile. pretty cool results from 5lbs worth of Pin vs 9lbs of fins. cheers


Also, @robincnn since @Greengenes707 is being a little bitch about his thread right now, lol Harbor Freight is having a sale on these organizers super cheap. I had to scratch my OCD , anal itch. wait, what?

organizational stuff.jpg
 
Growmau5 said:
that's consistent with my findings as well. I just did a side by side controlled test : 4 cutter pins vs 36" 5.886 heatsinkusa profile. pretty cool results from 5lbs worth of Pin vs 9lbs of fins. cheers


Also, @robincnn since @Greengenes707 is being a little bitch about his thread right now, lol Harbor Freight is having a sale on these organizers super cheap. I had to scratch my OCD , anal itch. wait, what?

View attachment 3669798
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yeah no offense to anyone i just deleted all my useless info froom there.bro that box on the bottom left...how much? i want all that stuff lmao. i wish i could be that organized
 
PurpleBuz said:
yes very true sparse staggered pins work really well as an Omni directional passive sink. The bonus that I found is if you add a teency bit of fan power that cooling power increases exponetially.
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This raises intriguing possibilities that could blur the line between passive and active cooling.
 
GG booted us out. I deleted my posts too

Mau not sure if you saw my post
https://www.rollitup.org/t/lens-and-reflector-optics-for-cob.893660/page-2#post-12195450

I like the organisers. Just zoomed in.. You got all monos and screws, holder, optics. So organized you could sleep walk and assemble a lamp. I just do my tests and leave stuff everywhere. Can't find stuff when I need it. I keep it disorganized to keep my wife away from my lab.

I am also seeing taller fins are better with passive. Smaller fins for active.
Thicker pins allow more height for pins. Thinner pins not as efficient when they are tall

Those coralux PCB make things so neat
IMG_20160417_120750.jpg IMG_20160331_173801.jpg

Saw your 4 drivers in horizontal. Do they get hot. If so vertial orientation may help.
 
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Growmau5 said:
looks like my thermo tips can be soldered right on the COB?
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Never liked standard thermocouple probes. Hard to work with them. I like these smaller green once. 29 awg

https://www.rollitup.org/t/thermometers-thermocouples-and-thermal-readings.896353/#post-12256364

https://www.rollitup.org/t/new-heatsink-concept.898414/page-3#post-12308312

Looking forward to your PIN/ FIN data

Growmau5 said:
arduino based data logger up and running with temps referenced to a RTC real time clock. and collecting all sorts of data. (probably more than I know how to decipher, lol).
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I got my 'arduino working with RTC in my mini 1x1x2 tent. Next I will try to collect data on SD card.
In another test I have monitored Tc manually and saw it changes according to ambient temperature.
I was testing the pin heatsinks and checking if there was any drift in Tc after few hundred hours. No change. Did not log data with ardunio.
I hear analog measurements not as accurate with 'arduino. I put a multimeter across thermocouple and did snot see any voltage. I am still figuring it out
IMG_20160407_170523.jpg
 
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@robincnn I actually put a computer fan mounted to my driver board for that reason. there is a nice breeze flowing thru the gaps between the drivers.
thanks for the links to those threads. I read the optics one several times, nice work on your testing. I imagine you linked because you saw my response to the "i can buy this stuff more cheaper" guy. I was just being snarky in that reply, in an underhanded way, lol.

I must have missed the Thermocouples, thermometers... thread. its fucking impossible to solder these K type probes. I just ended up creating this massive solid solder bubble encasing the probe tip for my measurements, it worked out ok.

love your little white project box there, and yeah those boards make LLDs a snap!
 
Greengenes707 said:
Very nice. Slick with the sensor on a mover.
Your room is like a fresh pair kicks...you need to get them dirty. Should do very good at 1050ma and that density. And now you can check relative intensity too. Pretty perfect. Look at you and all your new toys.
Now get a keeper pheno of something and mono crop a canopy like an 80's flat top.

It's easy to grind or dremel out clean access to the Tc point on ideal holders. I showed my modification to Ideal, and they took notice. Maybe they will make the little change.
You got to get on that T-type thermocouple too... makes your bud 5X more potent ;).
Keep it up man.
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T-type Thermocouple ( dual probe?) makes your medicine 5x more potent??

Pardon my ignorance but is this a temperature sensor? i would suspect to detect leaf temps? or am all the way off?
 
I don't doubt the pin will perform better. I would have concerns about your measuring device as thats the same one I've been using.

I get different readings from each thermocouple when running at the same time on the same heat source. When I use that sensor I use one output at a time for a rough estimate of whats going on. Maybe yours is more accurate

So then comes the design question of what do you want. They are both within spec but have different abilities as far as ease of setting up. I personally wouldn't favor either as they both are not completely ideal.

I'd double-check that meter before pulling vid. Its been a while but I remember a 5c or so difference from the outputs.
 
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Positivity said:
I don't doubt the pin will perform better. I would have concerns about your measuring device as thats the same one I've been using.

I get different readings from each thermocouple when running at the same time on the same heat source. When I use that sensor I use one output at a time for a rough estimate of whats going on. Maybe yours is more accurate

So then comes the design question of what do you want. They are both within spec but have different abilities as far as ease of setting up. I personally wouldn't favor either as they both are not completely ideal.
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thats a fair comment and statement. I was really going to try to hold my tongue and not make any assumptions in this video. just present data.
if I was going for funding, a grant, or presenting this data in a research paper, there are so many more controls that would need to be added. like swapping probes, cobs, various measuring points, etc.
with all that said, I am still leaning towards the possibilities that pin sinks and modular designs present.

cheers man.
 
robincnn said:
Thanks for the test. Even if there is small error due to measuring device.. The difference is big
Pins heatsinks perform better and are modular.
Can you compare the weight as well.
How much did that pin heatsink lamp weigh and how much was that long heatsink
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Thanks Robin.
-36" L 5.886 HSusa profile: 9lbs
-111mm Pin heatsink : 1.25lbs entire array with driver 8.772lbs

I am ok with a margin of error for this video. However, if guys that know whats up like you Robin, Pos, GG, SDS, Purplebuzz, Alesh ,Church, SUp tell me my methods are flawed. Ill pull down the video.
 
Growmau5 said:
Thanks Robin.
-36" L 5.886 HSusa profile: 9lbs
-111mm Pin heatsink : 1.25lbs entire array with driver 8.772lbs

I am ok with a margin of error for this video. However, if guys that know whats up like you Robin, Pos, GG, SDS, Purplebuzz, Alesh ,Church, SUp tell me my methods are flawed. Ill pull down the video.
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the important thing is that the method to measure is the same between the two test cases and that they are repeatable. seems to be the case here, so no worries.
 
Growmau5 said:
I am ok with a margin of error for this video. However, if guys that know whats up like you Robin, Pos, GG, SDS, Purplebuzz, Alesh ,Church, SUp tell me my methods are flawed. Ill pull down the video.
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Yes pull down all the videos. You making DIY look too sexy.:P
The only recommendation i have is that you add a scary music and show skull sign when you zoom in the driver and show max Vf.:fire: Some high voltage disclaimer stuff o_O....

I like the your test. More than what most would have done here at RIU. Thank You
 
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