LED light

cucusaddam

  sekarang kita banyak menggunakan lampu yg guna led(light emitting diode).
tapi satu persoalan saya : berapa power(watt) agak agaknya untuk satu biji led yg biasa dlm lampu suluh tuu dah surf dalam 'howstuffwork' tapi tak jumpa watt dia ....

me_ai

Power supply voltage is the voltage of the power supply (such as a 9 volt battery)
LED voltage drop is the voltage drop across the LED (typically about 1.7 - 3.3 volts; this varies by the color of the LED)
LED current rating is the manufacturer rating of the LED (usually given in milliamperes such as 15 mA)

resistor (ohm) = (power supply voltage - LED voltage drop) / LED current Rating

1W = 1V x 1A

That is, if 1 volt of potential difference is applied to a resistive load, and a current of 1 ampere flows, then 1 watt of power is dissipated.

utk so, dgn fomula kat atas boleh dpt dah kot kuasa yg digunakan oleh LED tu....
ok...


info from : http://en.wikipedia.org/wiki/Watt
             : http://en.wikipedia.org/wiki/LED_circuit

[ Last edited by  me_ai at 1-3-2007 09:09 AM ]

mbhcsf

I think there is one JApanese Scientist who was studying in Flourida had won a Nobel Prize for discovering a way to produce BLUE - light spectrum emitting LED. hmm

mbhcsf

check newscientist hmm?? 1998? may be

Kilokahn

240mW. generally.

Tunang aku LED engineer kat Avago Penang.

cucusaddam

tima kasih2 semua,saya dah dapat...measure ohm dlm litar lampu tu,kemudian measure voltage dia... guna formula v=ir cari i,kemudian guna formula p=vi..betulke ?