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cjh

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Posts posted by cjh

    Fossilized giant penguin reveals unusual colors, sheds light on bird e

    in General Reefkeeping_

    Posted

    carbon dating hor... has 1 too many variables.. any one of the following changes... it will make the whole reading totally inaccurate.

    1. the rate at which carbon-14 decays into nitrogen-14 has not changed throughout the unobservable past

    2. the ratio of carbon-12 to carbon-14 was in the environment in which the specimen lived during its lifetime

    3. there has not been any contamination in the specimen which we are attempting to date.

    the first 2 points need someone to live 36 million years to make sure it don't change.. ^_^ i have yet to find out who.. haha

    haha... i only remember my secondary school teacher telling us how they do it... cannot remember that much... maybe they got other method of doing it? if you found the person who lived 36millions old tell me also i wanna go take a look... lol..

    Outing to the LFS farm in the West on 02.10.10

    in SRC Contest and prizes section

    Posted

    Hi Guys,

    Gathering interest for another LFS farm outing in the West on 02.10.2010 ( Sat ) . We will do a car pool sharing this time round to save cost for everyone.

    the likely schedule for the trip is as follows;

    Time : 09 30 AM

    Meeting place at Jurong Point MRT for those without vehicle to join us .

    Jurong Point MRT => Coral farm => LCK => Lunch nearby => Jireh Marine => Qian hu ( For visit and coffee ) => Back to drop off at CCK MRT.

    For those whom can provide the transport , please provide the number of space available and for those whom does not have a transport , just feel free to join us and indicate your name too.

    Please indicate your interest below ;

    1) Harlequin Mania ( 6 seat available )

    2) CJH, jinhui

    3)

    4)

    Another DIY LED lighting

    in DIY Forum

    Posted

    Hi bro,

    I dun bought those heatsink but instead cannibalized it from unwanted electronic unit in my company workshop which save me some cost and also save the earth too :eyebrow:!

    Btw, from what I know...SLT should have what you want and you just need to waste some time searching around there :evil: .

    ohh.. ok ok .. will try looking over there... hopefully can find it... lol..

    Another DIY LED lighting

    in DIY Forum

    Posted

    After pending for more than 4 months :snore: , I decided to carry on my new LED project and finish it before end year moving house. I'll be doing 2 LED panel modules for my 2ft Cube Tank and this can be upgradeable to 3 or more modules if I decided to upgrade my tank to bigger at the later stage :eyebrow: .

    I have almost completed the drilling, tapping, screwing, soldering, polishing...for the first LED panel module but still got some stubborn stain at the left side of the 1mm stainless steel (reflector sheet) need to deal with <_< . The stain was originally from the sticky protection sheet on top of the stainless steel which I have hard time cleaning it :angry: .

    Can anyone advice me how to remove the stubborn stain :( ?

    Ok...Here are the Spec per LED Panel and picture of my partial work done;

    4x SSC P7,Pure White, 10W LED

    13x CREE XPE Royal Blue 3W LED

    Total Watt : >80W

    DSC09344.jpg

    DSC09345.jpg

    DSC09349.jpg

    DSC09353Small.jpg

    DSC09360Small.jpg

    DSC09352Small.jpg

    hi, where did you get that big heat sink from?? was trying to find big heat sinks...

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