lapanet | led

lapanet \| led this project is ongoing since year 2009.
led világítás kísérletek. a cél olyan költséghatékony 12v dc rendszer kialakítása volt, ami fényerőben is elégséges. a 12v rendszer a szintén dc rendszerű napelemes energiaforrással nagyon hatékony, nincs dupla konverzió és az azzel járó dupla és üzembizonytalan elektronika. - led lighting experiments. the objective was to set up a cost-effective 12v dc system which delivers satisfactory amount of light. the dc input connected to the dc (solar panel) source makes the setup very effective, as there is no double conversion. also the failing conversion electronic can be saved.

broadband		DIR

001 30w 230v ac driver.JPG	114	kB
002 30w natural white led on cpu heatsink with thermal paste.JPG	119	kB
003 comparison of color with 25w halogen.JPG	59	kB
004 measuring surface temp with ds1820.JPG	69	kB
005 measure with pc fan blowing directly.JPG	80	kB
006 dallas 1-wire converter and sensor.JPG	90	kB
007 old 300w halogen components.JPG	114	kB
008 a 25cm pet plastic bottle acts as chimney.JPG	80	kB
009 fits perfectly.JPG	95	kB
010 very bright.JPG	69	kB
011 one better doesnt look into the leds.JPG	83	kB
012 ikea halogen spot 10w.JPG	78	kB
013 3w led with 16 x 5050 type smd.JPG	78	kB
014 3528 and 5050 smd powered units.JPG	94	kB
015 i just love this picture.JPG	56	kB
016 outside lamp with 2 x 1.8w 3528-based leds.JPG	84	kB
017 kept in place with a minimalistic wire.JPG	120	kB
018 the 4w 3528-based led against the 40w halogen.JPG	60	kB
019 distributes light similarly to the halogen.JPG	69	kB
020 2 x 20w led with 230v ac drivers in the box on ex-v6 mega-heatsink.JPG	65	kB
021 3 large pentium ii heatsinks on a solid aluminium block.JPG	60	kB
022 measuring core temp after long warm-up.JPG	56	kB
023 color temperature is not the best.JPG	57	kB
024 10w led with 12v 700ma driver.JPG	120	kB
025 integrated direct-drive capable 12.5v 15w led.JPG	118	kB
026 fastened onto an old heatsink.JPG	108	kB
027 pentium i 75mhz heatsink.JPG	136	kB
028 because of only 12.0 intead of 12.5 volts only half the brightness.JPG	64	kB
029 quite powerful even with 12.0 volts.JPG	71	kB
030 indirect lighting is preferred.JPG	61	kB
031 direct light is very bright and unconvenient.JPG	48	kB
032 plexi light bulb with 10w white led and 700ma 12v driver.JPG	64	kB
033 airflow works well.JPG	64	kB
034 air must pass the heatsink to exit through the plexi chimney.JPG	113	kB
035 air intake and chimney manufactured using hot air gun and transparent tape.JPG	111	kB
036 2x 15w nominal direct drive leds at 15w because of 12.0 volts input.JPG	54	kB
037 the same to replace the cold white 30w 230v led.JPG	89	kB
038 lamp using the cold white plexi bulb with 7w power.JPG	96	kB
039 a little too much is reflected downwards.JPG	94	kB
040 looks like in the disco with the plexi edges luminating.JPG	98	kB
041 looks very nice and strong from above.JPG	89	kB
042 camera obscura effect on the ceiling with the shadow of an aloe plant.JPG	42	kB
043 nice power despite of the thick glass.JPG	105	kB
044 10w 12v ac-dc driver.JPG	96	kB
045 had to be cut in order to fit into fuel tank.JPG	94	kB
046 four drivers were hidden.JPG	81	kB
047 the new 4 x 10w lamp of the kid before soldering.JPG	111	kB
048 larger 10w modules mean better heat transfer.JPG	119	kB
049 the greeny 1 x 20w monster and the new sts lamp.JPG	106	kB
050 installed with 2 x 2.5 mm2 cableing.JPG	68	kB
051 capable of warp 8 speed.JPG	75	kB
052 3w 16 x 5050 smd 12v dc module installed as bedroom reading lamp.JPG	71	kB
053 tiny heatsinks preinstalled.JPG	51	kB
054 the same 3w modules as tv-time background lighting.JPG	84	kB
055 3 x 10w with 12v driver minimum concept with some technic pieces.JPG	141	kB
056 this will replace the voltage-sensitive (thus vibrating) large direct drive leds.JPG	120	kB
057 nice warm white light running on 12 volts.JPG	77	kB
058 each modules holds 9 diodes.JPG	67	kB
059 1w led module with 3-9v driver connected to the new dynamo hub.JPG	113	kB
059.MPG	4951	kB
060 the original spokes were reused yet still a bit long.JPG	151	kB
061 cheap plastic melts even below nominal load - alternative on the right.JPG	85	kB
062 6w 5050-based ac led on the right is brighter than 25w e14 candle light bulb on the left.JPG	63	kB
063 5050-based products.JPG	83	kB
064 datasheets.JPG	98	kB
065 replaced a 11w compact - instant light is a must.JPG	49	kB
066 nice lighting pattern.JPG	55	kB
067 very primitive inside of the 6w ac led.JPG	186	kB
068 each section is powered paralelly inclusive the top with different smd count.JPG	189	kB
069 improvized improvement for better airflow.JPG	109	kB
070 better cooling of the cap.JPG	102	kB
071 more than enough brightness after the 25w bulb.JPG	70	kB
072 turned the cap to the inside to light the basin area rather than the ceiling.JPG	47	kB
073 another 6w type using 3528 smd-s could be disassembled properly.JPG	116	kB
074 ac electronics is minimal.JPG	105	kB
075 the pcb from behind.JPG	106	kB
076 historical gas lamp in budapest zoo.JPG	225	kB
12vdc_consumption_20100911.ods	31	kB
12vdc_consumption_20100911.xls	21	kB

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