kezdõlap | home

lapanet | led



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