Astir Grow Led Panel Project...

When I was still in 3D designing (Some old friends might remember all the Scetch Up & PovRay designing ,there.... ) ... The driver of my choise ,for the panels ,was MeanWell APC -35-350 : http://www.meanwell.com/search/apc-35/default.htm But at that time ,it was still under production... I've to ask for prices...I think has already hit the market from last August.... In fact I could use APC-25-350.... But that poor little driver would have had been working close to 100% load,for prolonged periods.. Better a bit bigger driver... http://www.meanwell.com/search/apc-25/default.htm

guod said:

PCB attachment the simple way.... . http://www.alibaba.com/showroom/self-tapping-screw-for-aluminum.html

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If the heat sink is made out if 1050 as SDS mentioned, self tapping screws will cause it to crack and separate at any thickness over .030". With such a soft ally It's safe to bet that the base is at least .250". I personally suggest 6063 or 2024, however if you are using extrusion or fins of any type 6063 it pretty much the only viable choice (ridged enough to mill, good heat dissipation properties, and much easier to weld). This is if you are using heavy expensive aluminum heat sinks. If you do go with screws dip them in a dielectric primer/sealant first. That will avoid the corrosion issue and relieve the need for blue or red loctite.

As for the tracers for direct heat sink mounting, 1oz copper liner works well... That's how I first started running mine. A good dielectric coating and I left the slug locations bare. I put the thermal slugs directly on the bare heat sink and had much better heat management that with any method since.

"gap" or "hole" (rant) referring to the supporting documentation, not you're analysis or explanation. You're analysis has always been good. Misunderstanding.........No editor here either.
http://www.allflexinc.com/flexible-printed-circuit.shtml

stardustsailor said:

.. I'm worrying a bit with the thermal expansion/contraction of heatsink/screw... Being made from different metalic materials ,they'll have different thermal ' volume ' responses/changes... So,after some cycles of switching on & off ,maybe the screws will become loose... And if so,they'll not apply the appropriate pressure ..So the contact between the PCB and heatsink ,maybe become rather ....a soft touch.... I'm not sure about all these...It's a possibility,though....

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not at this temp-range (20° - 70°C) and dimension (5mm). estimated gap for this is about 0.003mm.

tenthirty said:

"gap" or "hole" (rant) referring to the supporting documentation, not you're analysis or explanation. You're analysis has always been good. Misunderstanding.........No editor here either. http://www.allflexinc.com/flexible-printed-circuit.shtml

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".... Dielectric thickness can vary from .0005" to .010". Often an adhesive is used to bond the metal to the substrate, but other types of bonding such as vapor deposition can be used to attach the metal. ...".................................................. Vapor deposition of what ? Epoxy ? glue ? ...Vapor deposition of metal ?......................................................................................................... "...........Because copper tends to readily oxidize, the exposed surfaces are often covered with a protective layer. Gold or Solder are the two most common materials because of their conductivity and environmental durability.............." Hmmmm,aha....Gold or solder ,eh ? ..................................................................................................................................... BASE MATERIALS: Polyimide: .5 mil to 5 mils (.012mm - .127mm) Polyester: 2 mil to 15 mils (.050mm - .127mm) Adhesiveless Materials: Copper thickness .5 oz. to 2 oz. Flame Retardant: Laminates and Coverlay Other Materials Upon Request BASE COPPER: .5 oz. - .0007" (.018mm) thick copper 1 oz. - .0014" (.036mm) thick copper 2 oz. - .0028" (.071mm) thick copper 3 oz. - .0042" (.107mm) thick copper 4 oz. - .0056" (.142mm) thick copper 5 oz. - .0070" (.178mm) thick copper 6 oz. - .0084" (.213mm) thick copper 7 oz. - .0098" (.249mm) thick copper Thicker coppers are available (call for information). SOLDER MASK: Polyimide coverlay: .5 mil to 5 mils (.012mm - .127mm) Polyester coverlay: 1.5 mil to 3 mils (.076mm - .228mm) Photo-imageable covercoat: Liquid for surface mount and dense applications SURFACE FINISH: Hot Air Solder Level (HASL) RoHS Compliant and tin lead Tin Plating (RoHS Compliant) Elctroless and electrolytic Silver (RoHS Compliant) Immersion Hard Gold over Nickel (RoHS Compliant) (Typically used for contacts) Soft Gold over Nickel (RoHS Compliant) (Electrolytic - typically used for bonding gold wire to the gold layer) ENIG (Electroless Nickel Imersion Gold) (RoHS Compliant) (Electroless - typically used for bonding aluminum wire to the nickel under the gold) Organic Coating OSP (RoHS Compliant) RIGIDIZERS/STIFFENERS: FR4-drilled, routed and scored Aluminum Polyimide Polyester Stainless Steel

stardustsailor said:

... The driver of my choise ,for the panels ,was MeanWell APC -35-350 : http://www.meanwell.com/search/apc-35/default.htm But at that time ,it was still under production... I've to ask for prices...I think has already hit the market from last August.... In fact I could use APC-25-350.... But that poor little driver would have had been working close to 100% load,for prolonged periods.. Better a bit bigger driver... http://www.meanwell.com/search/apc-25/default.htm

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i also think the MeanWell APC -35-350 is the best driver for your panels....the APC-25-350 will not work see max output-voltage (70V)

Hey SDS, is there any photo of the last WR (under leds) cured ? i would really like to see the bud's shape and trichrome coverage... Thanks!

weedman420gr said:

Hey SDS, is there any photo of the last WR (under leds) cured ? i would really like to see the bud's shape and trichrome coverage... Thanks!

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No,I'm sorry for that... But you can ask ganja or psynobi ... They can inform you....

Although not in 12/12 cycle,flowering is setting fine,I should say .... ........................................................................................ ............................................................... And another thing...... They have rather increased nutrional needs... I'm feeding rather large amounts of nutes.... (twice ,every week...)... ================================

If possible (I know it is more complicated with multi-panels), but separate on/off switches + piggyback power cords via IECs would be very nice, especially for picture taking

"....piggyback power cords via IECs...." ? ....... ??? " Piggyback ".. Meanin " twisted -spring like" cable,(like telephone's have ? )

http://www.alibaba.com/showroom/piggyback-power-cord.html --------------------- IEC= Norm IEC 60320 C13/14.... same as on every PC.... the other side depends on the country

guod said:

http://www.alibaba.com/showroom/piggyback-power-cord.html --------------------- IEC= Norm IEC 60320 C13/14.... same as on every PC.... the other side depends on the country

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Thanks,brother Guod... (Still don't get ,why they're called "piggyback"...WTF ? I always thought ,that i have kinda wild imagination.... But at this case ,I can not see any resemblance of the cable with ....a pig's back.... !!! ..???? ) One of the main reasons ,I dislike the current drivers...two bare cables for the mains....Nop...Not good...

making bacon.... you can stack two together for one outlet. in europa this things not legal.

"Piggybacking" is a term used that means carry the load. He is referring to linking the mains power from the first panel to one or more behind it. In many newer model LED panels they are calling it "daisy chain". The following link is how e-shine does it. http://eshinesystems.en.alibaba.com/productshowimg/441415011-210718593/200W_LED_grow_panel.html

@Guod & @Hosebomber.... Yes,I got it now.... Indeed ,this kind of inter-connection,between electrical appliances ,it's not allowed in EU... (Thats's why ,there's no "male" mains socket ,in such appliances...(i.e. pc power units , other PSUs ,UPSs' ,ect )... And a case is needed also,to do that "daisy -chain" link....The plug needs somewhere to be installed ......................................... (I knew only for "daisy-chain" cords used in big-wall ,rock-climbing...==================!!!!!!!!!Ohhhhh! El Capitan.....-A big rock in Yosemity Valley....- (My life's dream to climb it,roll a fat one ...Smoke the sh!t ,like as if was the last one .....and then base jump from that big stone,stoned... .......But ...Considering my economical state....It'll probably remain a dreammm... It doesn't matter....Next time....During the next "joyride ",I hope....) Anyway.... Babblin' again....

So.... Pink leds.... There are some patents,already, for those plant growth specialised leds..... But did you knew about ? : http://sjzbcchem.en.alibaba.com/product/501254069-213404312/promote_plant_growth_phosphor.html ======= http://sjzbcchem.en.alibaba.com/product/501052770-213404312/Promote_plant_growth_phosphor_powder.html?tracelog=cgsotherproduct1 ============================ Judging from the actual color of the leds shown.... The spectra,probably is this.... ...................................................................................============The usual asian BS !================= ................................................................................

Some CE general info.................................(The growth chamber guide book .Nice read for free -time....)

http://www.controlledenvironments.org/Growth_Chamber_Handbook/Ch01.pdf .............. http://www.controlledenvironments.org/Growth_Chamber_Handbook/Ch02.pdf ...... http://www.controlledenvironments.org/Growth_Chamber_Handbook/Ch03.pdf ........ http://www.controlledenvironments.org/Growth_Chamber_Handbook/Ch04.pdf ....... http://www.controlledenvironments.org/Growth_Chamber_Handbook/Ch05.pdf ........... http://www.controlledenvironments.org/Growth_Chamber_Handbook/Ch06.pdf ......... ..... http://www.controlledenvironments.org/Growth_Chamber_Handbook/Ch07.pdf ....... http://www.controlledenvironments.org/Growth_Chamber_Handbook/Ch08.pdf ........... http://www.controlledenvironments.org/Growth_Chamber_Handbook/Ch09.pdf ......... http://www.controlledenvironments.org/Growth_Chamber_Handbook/Ch10.pdf ...... http://www.controlledenvironments.org/Growth_Chamber_Handbook/Ch11.pdf ....... http://www.controlledenvironments.org/Growth_Chamber_Handbook/Ch12.pdf ....... http://www.controlledenvironments.org/Growth_Chamber_Handbook/Ch13.pdf .....http://www.controlledenvironments.org/Growth_Chamber_Handbook/Ch15.pdf .....

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Nice!!!! Very nice!!