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Old 03-05-2017, 12:15 AM #17
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Default Re: Bench power supply and laser diodes..

PLT5 450B single mode laser from above-picture.
an retailaluhousing with an alubacktrigger with an cobber-module inside and radial heatsink at front.

clocking in at 197mA at tailcap DMM on mA-setting and 0.169A on (10A) Amp-setting //2xAAA. (often puzzeles me why multimeters-values differs from when on Amp (10A) to when on mA (<600ma) setting and with so much and on relative accurrate meters..
(Le2max X822 campictures, plain no fog or likewise)









Btw, the 60US'labby on the handheld rack, is an NDB7775 2.5w with driver and all inside the heatsink-housing, that seem to be flooded with siliconerubber :-/ but its ideel to be run of RC 3cell lipo packs with an XT60 to jack adapter.. its clocking in around 1.20amp on attched RC'ampmeter (though its <12v as to the 1.2A)
Attached Thumbnails
Bench power supply and laser diodes..-single-m-case-flash.jpg   Bench power supply and laser diodes..-single-mode-flash.jpg   Bench power supply and laser diodes..-singlemstand.jpg   Bench power supply and laser diodes..-singlm-casing.jpg   Bench power supply and laser diodes..-victor.jpg  

Bench power supply and laser diodes..-sigkm.jpg   Bench power supply and laser diodes..-img.jpg   Bench power supply and laser diodes..-awt.jpg  


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Curricolum' for miscellaneous joy & budgetbuilds..
405 X1 S06Jx12
405 x9 BDR209x16
445 x2 A140
445 x2 unknown
445 x1 NUBM06
450 x2 NUBM05
450 x2 PLT5 450B
450 x3 PLTB450B
450 x2 NDB7775
455 x1 NUBM08
462 x2 NDB7675
520 PL520 50mW ver.
532 x14 misc.(though' lot of nm'variation)
638 ML501P73
639 x2 HL6323
808 x2 0.5W-T05 9mm
Motivation soley own joy & the chase for an NM collection,
and the overall fascination of massless-particless
and the mind-buckling forces there are in play..

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Old 03-05-2017, 03:07 AM #18
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Default Re: Bench power supply and laser diodes..

For the first question, I install a dummy load across my
adjustable power supplies. I use a 2.2K ohm to keep a
small load in the regulator.
HM
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Old 03-05-2017, 11:41 AM #19
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Default Re: Bench power supply and laser diodes..

I just watched the EEVBlog testing of the Korad KA3005P...
I wouldn't use that PS for LD testing. Check out the Fail
starting at 23:52.



Jerry
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Old 03-06-2017, 05:29 AM #20
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Default Re: Bench power supply and laser diodes..

Quote:
Originally Posted by lasersbee View Post
I just watched the EEVBlog testing of the [SIZE=2]Korad KA3005P...
I wouldn't use that PS for LD testing. Check out the Fail
starting at 23:52.
Jerry all of these issues have been adressed by Korad with stronger trans in newer batches...(was down to an lacking 220v trans(not the aussie model), being tortured by the max'amp on a hefty 240v aussie juice)

on EEVblog the Korad seems to be hands-own the best budget psu with the price in mind and actually consist of inner parts that for an extreme cheap liniar-psu, would be difficult to manage in private DIY-world with an eye on price, - in the Korad-thread on the EEVforum, these Korad PSUs gets feedback that are pretty solid, but there are multiple models and the first batch of KA3005D suffered according to EEVblog.

I got both the KA3003P (62US delivered) model and the EU KD3005P model (75EU delivered), and there is quite a difference, but i belive the KD model is of newer heritage and this model i purchase from Reichhelt GE in Germany, and with all the bells and whistle as to EU legi & regi and sadly also insunk bananaplugs.

one significant difference is the noise, the KD3005P model is extremely quite when in use' as to the KA3003P and I also cherise that you got the double joystick click-features on the two-knobs V & A, but I do missing an specifik load button on the KD-model front, but still you got all the features from the KA-front panels also on the KD model if you run the KA-software on the KD-model, then you have all the memory-features and protection and a seperate loadbutton as software..(the models need to have an P as the end sign to have rs232 and usb interface so you can datalog and graph it out, and all that jazz of graphcolorfont and graph'grid systems and you can also program both model to run timely-sequence-setup' so at specified timeintervals it runs a set valueagenda of volt&amp-values at numerous intervals)
software:
Top Quality Power Supply Manufacturer in China - SHENZHEN KORAD TECHNOLOGY CO., LTD.
https://www.reichelt.de/index.html

EEVblog has only tested the old KA3005 model (first batch) and a limited old 220vtrans'model not suited for the high-240veffect in Australia, and are also stating in the details in the videos that these issues have been adressed from Korad in the newer batches and EEVblog linking to this partically video in there info-spec in the fail-vid above...



here is an teardown, but its the first batch and where it come short..(literally)




Here EEVblog showing the new batches of KA-model and whats have been changed..


check the conclusion from 2:20 where he sums it up as its an fantastic power supply now, and your getting an amazing bargain for the extreme low ridicalus price and its the best bang for buck out there and also relates to the positive-conclusion in the followup video above, where another users are testing & torturing it as an arc welder, and the wicked thing Korad has actually make more upgrades since that, and afaik' the new KA models got 3 caps on the board from only 1 on the old batch and still only 1 on the new batch, to having 3 caps in the newest ones and a regulated fan, but at the end of the day, it aint the KA3005 model i got, its only the KA3003P and they are not identical, its an lesser trans in the 3amp version (36v/3a/220v spec trans, you can see it on the weigt pictures in page1) and the board are also different in mine, so cant conclude or salute to all the good things he states about it, as mine KA-model is only the 3amp version, while the KD model I got is the 5amp, but that one is likely the same since that has regulated fan also.(but all the video and the EEVblog on the korad-forum-thread give an one hell of an good insigt into this adjustable & programable psu from multiple EEVusers testing it.

--
Here is the forum-EEVblog-thread where the users testing there own with oscillioscope and different tool for spiking and general pro and cons, (and with the price in mind' as not that relavant to compare a budget model like this against an fx 500-1000'US modell) overall verdict imo' pretty solid adjustable programable liniar-150w PSU.
EEVblog #315 - Korad KA3005P Review/FAIL - Page 13

It was actually a minor mistake i ended up with two, but they both got there pro and cons, as to different models' so thats a plus.. - i had first checked aliExpress for an cheap PSU and saw and officiel store from Korad selling an KA3003Pmodel (30v/3A/90w) way under all the other thirdparty-sellers, and this offer was supprinsingly with free shipping, and took the plunge on that to 62US, but soon got the impression when it wasnt processed after 10days and the item had been pulled for any further purchases, - that it likely was an error-listing, and contacted the officiel Korad site as an buyer that wanted to purchase directly, and what was the cheapest they could deliver a programable KA-model for, and they stated some before-shipping-prices there where around aliExpress thirdparty-level, and the cheapest way of shipping was 70US for shipping alone when buying direcly from Korad, and not thrue AliE, so it would summon to around 140US delivered..

then i could conclude that the item to 62US i have purchased and there was just hanging and was not active anymore, likely was an mistake and would not get shipped, as to "error-listing" and lack of shippingcost not included..(these PSUs quite big in casing and packing, so ewen if they are from China quite pricey to ship)

I then started to look regionally here in EU, since i also risk an siginificant tax, here from the worlds most taxed country DK, and a item like this could easyly double when it ran into massive-tax + a mandatory taxhandling-fee..

I then saw an offer on Reichhelt (huge German-tool & electronic seller) for the new EU KD3005P model, that was supprinsingly cheap with EU-price-level in mind and with only 5'EU in shipping to DK Copenhagen, and since purchases in EU got no tax, it was quite ideel, and 2 days delivery-time' so took the plunge on that KD3005P (30v/5A/150w) and at the same time i could go bananas in numerous-different-resistor-diodes to be shipped along same time, in the chase to make an dummyload for an rookie like me.

and all was good, the KD3005P arrive and it was great, but then suddenly the KA3003P suddenly also arrived at my doorstep, and the AliE Korad-storeseller had been so straight to actually processed the order, ewen thow just shippingcost on the DHL fastshipping-packagemarker on the package seems to origin more then what i paid for it all together, and the partically seller has also been so nice to put an value on the parcel at 9.99US that i stated at check-out, so i shouldnt pay any danishimportfee, as to an <11US danish value-item-limit.. (topnudge' to experience chinese-sellers like that)

Quote:
Originally Posted by Hemlock_Mike View Post
For the first question, I install a dummy load across my
adjustable power supplies. I use a 2.2K ohm to keep a
small load in the regulator.
HM
thx for the feedback Mike, what adjustable PSU do you have...?
Im a rookie when it comes to electronic, and havent taken any step to mod the psu, or cross the pads with an dummyload, simply from lack of knowledge, i do cross the +/-pads before i put a diode on it, to make sure aint any juice left in the system and short it out with an little amp in play..
I have checked for spiking but a very basic test, with an DMM at MAX to see if it delivers higher then ask for, and no spike-signs there, but dont got any O-scope in house, still waiting for my 13US shipped DIY oscilliscope from GB- .(and certainly dont got high hopes for that one, but will give some knowledge, for relative little amount)

as when it comes to dummyload i tryed some of the schematics there are here on LPF, most basic ones, as to the different voltage needed for different LDdiodes with appropiate 4001 diodes and 1ohm and 0.7v each, and then read the current from both sides of the 1ohm, and take it from there, but ewen a phrase like mv = ma, got me to wonder, hmm i need to be in the mv setting on the dmm when reading current..(go figure..)
but for the time being trying to get some insigt into resistor-diodes and testing with some of the bigger resistor diodes, since the 4001 is pretty ampweak, i also purchased a lot of different ones, and just testing at a breadboard how they stand out (with some thick breadboardwires, and what load they are synonym with in series, wthout any fragile-driverparts in between them and the psu and nothing to f..k up..(but as a start i likely need to take a moment to read the manual from the PSU, so i can get a better understanding of the jump between constant current and constant voltage that takes place and not just take it all on the fly
at some diffuse-level as to actual comprihention..)
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Curricolum' for miscellaneous joy & budgetbuilds..
405 X1 S06Jx12
405 x9 BDR209x16
445 x2 A140
445 x2 unknown
445 x1 NUBM06
450 x2 NUBM05
450 x2 PLT5 450B
450 x3 PLTB450B
450 x2 NDB7775
455 x1 NUBM08
462 x2 NDB7675
520 PL520 50mW ver.
532 x14 misc.(though' lot of nm'variation)
638 ML501P73
639 x2 HL6323
808 x2 0.5W-T05 9mm
Motivation soley own joy & the chase for an NM collection,
and the overall fascination of massless-particless
and the mind-buckling forces there are in play..

Last edited by Enchilada; 03-10-2017 at 07:08 AM.
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Old 03-10-2017, 05:03 AM #21
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Default Re: Bench power supply and laser diodes..

the new double threaded-screw-in-diodesink works good and makes it a lot easyer to change diodes with wth the use of RC-plug to the LDpins. (high C'rated lipo-plug & silicone wires)...
Housing a PLTB450B
P8MAX cam

LE2M cam.


Looks wicked how deepblue the PLTB450B diode delivers at relative little effect, the beam allmost looks like its painted on the picture (no fogh or likewise and picture is taken in the middle of the day with curtains on with Huawei P8MAX mobile on std sett., a mobile that got 4 colored sensor RGB+W (was socalled worlds first, the implement of White to the standard RBG camsensor-spektre (RGBW) to sum it up' a promogimmick, but it does got its forces..

Gotta get myself a budget LPM, Its certainly missed :-/
Attached Thumbnails
Bench power supply and laser diodes..-sinked-pltb450b-low.jpg   Bench power supply and laser diodes..-sinked-mid-pltb450b.jpg   Bench power supply and laser diodes..-sinked-pltb450b.jpg   Bench power supply and laser diodes..-sink-med.jpg   Bench power supply and laser diodes..-simk-off-dist.jpg  

Bench power supply and laser diodes..-sink-off-clo.jpg   Bench power supply and laser diodes..-blue-pltb450b-2.jpg   Bench power supply and laser diodes..-blue-pltb450b-3.jpg  
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Curricolum' for miscellaneous joy & budgetbuilds..
405 X1 S06Jx12
405 x9 BDR209x16
445 x2 A140
445 x2 unknown
445 x1 NUBM06
450 x2 NUBM05
450 x2 PLT5 450B
450 x3 PLTB450B
450 x2 NDB7775
455 x1 NUBM08
462 x2 NDB7675
520 PL520 50mW ver.
532 x14 misc.(though' lot of nm'variation)
638 ML501P73
639 x2 HL6323
808 x2 0.5W-T05 9mm
Motivation soley own joy & the chase for an NM collection,
and the overall fascination of massless-particless
and the mind-buckling forces there are in play..

Last edited by Enchilada; 03-10-2017 at 02:25 PM.
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Old 03-25-2017, 09:44 AM #22
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Default Re: Bench power supply and laser diodes..

That blue light of massless particles, looks wicked and like its painted on..
another Osram PLTB450B build driven conservative, where im fooling around with different screw-on-LDsinks attachements and testing the use of indium, copper'grains and solderballs in trying to close as much of the "diode in thermal conductive-materiel and see if any gain of thermal management is achived by the use of any of these and perhaps in the c-operation with some good shin-etsu thermal nano-compound..

(P8MAX cam)





Attached Thumbnails
Bench power supply and laser diodes..-dark-beam.jpg   Bench power supply and laser diodes..-img_20170312_132417-crop.jpg   Bench power supply and laser diodes..-img_20170312_133620-cr.jpg   Bench power supply and laser diodes..-img_20170312_132247.jpg   Bench power supply and laser diodes..-img_20170312_133810.jpg  

Bench power supply and laser diodes..-long-cropped-not-downres.jpg  
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Curricolum' for miscellaneous joy & budgetbuilds..
405 X1 S06Jx12
405 x9 BDR209x16
445 x2 A140
445 x2 unknown
445 x1 NUBM06
450 x2 NUBM05
450 x2 PLT5 450B
450 x3 PLTB450B
450 x2 NDB7775
455 x1 NUBM08
462 x2 NDB7675
520 PL520 50mW ver.
532 x14 misc.(though' lot of nm'variation)
638 ML501P73
639 x2 HL6323
808 x2 0.5W-T05 9mm
Motivation soley own joy & the chase for an NM collection,
and the overall fascination of massless-particless
and the mind-buckling forces there are in play..

Last edited by Enchilada; 03-26-2017 at 07:10 AM.
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Old 03-25-2017, 07:29 PM #23
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Default Re: Bench power supply and laser diodes..

Cute cat and nice build!
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Old 03-26-2017, 01:36 AM #24
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Default Re: Bench power supply and laser diodes..

Nice build indeed.

Too bad the camera makes the beam look like that, but that's a problem with bright monochromatic light in general - it's not something that commonly occurs so they don't optmize camera's to render well.

Oddly this makes real images look badly photoshopped, a problem for sellers i'm sure.
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Old 03-26-2017, 03:44 PM #25
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Default Re: Bench power supply and laser diodes..

After seeing the EEVBlog update on the PS...
I'd get one for the shop since they fixed the
problem.

Jerry
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Old 03-26-2017, 04:44 PM #26
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Default Re: Bench power supply and laser diodes..

Very nice build Enchilada. Lovely cat BTW. +rep
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