LED Panel

[RockyBoy]

It is just another application for LED

Truely better energy efficient than normal lightings and brighter and long lasting...

[sherman]

Do a test last nite.

First power up 6 P4 white. No issue

[sherman]

Next power up 10 P4 LEDs

Still not much issue.

Look like a little drop in intensity.Maybe around 600 mA

[sherman]

Next power up 12 P4 white.

A noticeable drop in the light intensity.

Around 400 mA.

For many others I test it either start to blink or cannot even light up.

This is the only constant current driver that can still light up at lower intensity

[sherman]

I like to conclude this constant current driver can easily drive up to 8 LEDs as claim

at 680 +/- 20 mA.

With more LEDs it still can drive but the intensity fall

[BarraCuda]

Will check around. So far I never use 1000 mA. I find the heat dissipation is

not easy.

I feel that its okay, the star temperature I measured its around 60C at 1000mA.

[sherman]

I feel that its okay, the star temperature I measured its around 60C at 1000mA.

Bro take measurement from the LED solder point.

That should not be more than 40 Deg C if I remember correctly

[BarraCuda]

Bro take measurement from the LED solder point.

That should not be more than 40 Deg C if I remember correctly

For CREE, the max junction temperature is 150C, with a thermal resistance of 8C/Watt. 60C+ (8CX4Watt) = 92C. Still within the thermal reliability design requirements.

[davce99]

http://photiczoneled.com/default.html interesting project!!!!

[davce99]

http://photiczoneled.com/default.html interesting project!!!!

[sherman]

For CREE, the max junction temperature is 150C, with a thermal resistance of 8C/Watt. 60C+ (8CX4Watt) = 92C. Still within the thermal reliability design requirements.

Different spec.As long as within spec than the life of LED no issue

[sherman]

http://photiczoneled.com/default.html interesting project!!!!

Interesting

[BarraCudaTM]

Different spec.As long as within spec than the life of LED no issue

SSC should be similar as they use CREE emitters.

[sherman]

After completing the nano LED lighting decide to do something the home can use and also help to reduce the electrical bill

I build this 4 ft LED light strip.

The strip LED after installation

[Thexder]

Interesting DIY LED project on reefcentral. Click here.

[sherman]

Interesting DIY LED project on reefcentral. Click here.

Bro,

Very interesting. Thank You for the link

[sherman]

The latest LED news:

The Ostar Lighting LED, which will be launched on the market this summer, can provide sufficient light for a desk from a height of two meters, for example. Its small size also enables the creation of completely new lamp shapes.

A lumen (lm) is the unit of measurement for the amount of light emitted by a light source. A 60-watt light bulb emits 730 lm, while a 50-watt halogen lamp has an output of approximately 900 lm. To achieve the 1,000 lm output for the tiny Ostar Lighting LED, the experts at Siemens’ Osram subsidiary employed a sophisticated system for high chip-packing density, whereby the researchers managed to integrate six high-performance LED lighting chips into the unit’s small housing. Each chip has an area of only one square millimeter, which makes for very concentrated overall luminosity.

Different types of LEDs are used today in various areas, for example as background lighting in cell phone displays, as well as in car turn-signal lights, brake lights, and daytime running lights. The benefits are obvious: The diodes are extremely small and consume little energy because they efficiently convert electricity into light. The Ostar Lighting LED, for example, produces 75 lumens per watt at 350 milli-amperes of operating current — much more than an incandescent lamp, which only converts a fraction of the electricity supplied into light, with the rest lost as heat energy. In addition, LEDs contain no lead or mercury, which makes them very environmentally friendly. They also last around ten times longer than halogen lamps and 50 times longer than incandescent lamps, thereby helping to significantly reduce maintenance costs.

For many years, however, LEDs were unsuited for room lighting applications because they weren’t bright enough. The Ostar Lighting LED marks a further step toward suitability for such applications. Osram has already supplied a Migros supermarket in the Swiss canton of St. Gallen with 18,000 Golden Dragon LEDs, which have a lower output than the Ostar Lighting units. These LEDs emit neither UV rays nor heat, which means they have virtually no negative impact on delicate grocery items such as milk, meat, fruit and vegetables.

Source: Siemens

[RockyBoy]

The latest LED news:

The Ostar Lighting LED, which will be launched on the market this summer, can provide sufficient light for a desk from a height of two meters, for example. Its small size also enables the creation of completely new lamp shapes.

A lumen (lm) is the unit of measurement for the amount of light emitted by a light source. A 60-watt light bulb emits 730 lm, while a 50-watt halogen lamp has an output of approximately 900 lm. To achieve the 1,000 lm output for the tiny Ostar Lighting LED, the experts at Siemens’ Osram subsidiary employed a sophisticated system for high chip-packing density, whereby the researchers managed to integrate six high-performance LED lighting chips into the unit’s small housing. Each chip has an area of only one square millimeter, which makes for very concentrated overall luminosity.

Different types of LEDs are used today in various areas, for example as background lighting in cell phone displays, as well as in car turn-signal lights, brake lights, and daytime running lights. The benefits are obvious: The diodes are extremely small and consume little energy because they efficiently convert electricity into light. The Ostar Lighting LED, for example, produces 75 lumens per watt at 350 milli-amperes of operating current — much more than an incandescent lamp, which only converts a fraction of the electricity supplied into light, with the rest lost as heat energy. In addition, LEDs contain no lead or mercury, which makes them very environmentally friendly. They also last around ten times longer than halogen lamps and 50 times longer than incandescent lamps, thereby helping to significantly reduce maintenance costs.

For many years, however, LEDs were unsuited for room lighting applications because they weren’t bright enough. The Ostar Lighting LED marks a further step toward suitability for such applications. Osram has already supplied a Migros supermarket in the Swiss canton of St. Gallen with 18,000 Golden Dragon LEDs, which have a lower output than the Ostar Lighting units. These LEDs emit neither UV rays nor heat, which means they have virtually no negative impact on delicate grocery items such as milk, meat, fruit and vegetables.

Source: Siemens

Hope the price is better....

[sherman]

The overflow compartment

Remove the wool on the overflow section on 2/3/09

Attached a sewing net to the original egg crate that was use to support

the wool

Next place the egg crate so that half is above the water level and the other

half still immersed in the sump water

[sherman]

The tank overflow will flow along the half immersed netting .

As the led grown light is still not ready I temporarily use a 13 w T5 to light the

scrubber for 24 hours.

[sherman]

Today I check the scrubber unit algae ,brown start to grow

[sherman]

For DIYers who are using LEDs on star PCB you can choose to get constant current driver for your LEDs with a DC adaptor of the require current

or you can choose to get an AC input(230vac) and DC output LED driver (build constant current driver)

MicroDrivers from www.ledsupply.com

MultiDriver 8 can drive either 8 X 1W LEDs in series at 350mA, 16 X 1W LEDs in series/parallel at 350mA or up to 6 X 3W LEDs at 700mA.

Price is around USD$31 each

Or you can use the below constant driver of around the same spec of 6 x 3w LEDs at 680mA at S$28

[RockyBoy]

Or you can use the below constant driver of around the same spec of 6 x 3w LEDs at 680mA at S$28

Where to purchase this driver?

[sherman]

Where to purchase this driver?

You can get from me

[RockyBoy]

You can get from me

Sure thing bro.