Author Topic: Need help ano po ang value ng resistor ang ilalagay ko d2 pasok kayu... (Read 2010 times)

j a y k e z · « **on:** March 14, 2008, 11:48:24 AM »

good day mga sirs!
meron kac akong fan rated 12v@700ma
eh ung ps ko is 12v @12amp.
ano pong value ng resistor ang iseseries ko para malimit ung current papunta sa fan ko

lagyan ko rin sana ng led hehe para astig

what value mga sir

Philippine Electronics Forum · « **on:** March 14, 2008, 11:48:24 AM »

zer0w1ng · « **Reply #1 on:** March 14, 2008, 11:55:16 AM »

No resistor.
Your fan will only draw 700mA even your PS is 100Amps.

Philippine Electronics Forum · « **Reply #1 on:** March 14, 2008, 11:55:16 AM »

'yus · « **Reply #2 on:** March 14, 2008, 11:58:34 AM »

Quote from: Jayke on March 14, 2008, 11:48:24 AM

meron kac akong fan rated 12v@700ma
eh ung ps ko is 12v @12amp.
ano pong value ng resistor ang iseseries ko para malimit ung current papunta sa fan ko

kelangan pa bang mag-series ng resistor dito?

pwede siguro fuse na lang, pang-protection sa fan saka sa ps mo..

Philippine Electronics Forum · « **Reply #2 on:** March 14, 2008, 11:58:34 AM »

j a y k e z · « **Reply #3 on:** March 14, 2008, 12:00:50 PM »

ahhh okey po mga sir fuse n lng ilagay ko

tnx sa reply

eh ung sa led po?

Philippine Electronics Forum · « **Reply #3 on:** March 14, 2008, 12:00:50 PM »

Shey · « **Reply #4 on:** March 14, 2008, 12:03:50 PM »

Quote from: Jayke on March 14, 2008, 12:00:50 PM

ahhh okey po mga sir fuse n lng ilagay ko
tnx sa reply

eh ung sa led po?

Ah ibang usapan na yan.. Use this formula:

(Vin-Vled)/0.020 = Resistor Value [ 0.020A current para sa LED ]

Vled = 2.8 volts kapag red,yellow,green Vled= 3.6-3.8 volts kapag white,blue

Example: To use a red led sa 12 volts na power supply.

(12V-2.8V)/0.020A = 460 Ohms

Philippine Electronics Forum · « **Reply #4 on:** March 14, 2008, 12:03:50 PM »

j a y k e z · « **Reply #5 on:** March 14, 2008, 12:21:46 PM »

Quote from: Electron on March 14, 2008, 12:03:50 PM

Ah ibang usapan na yan.. Use this formula:

(Vin-Vled)/0.020 = Resistor Value [ 0.020A current para sa LED ]

Vled = 2.8 volts kapag red,yellow,green Vled= 3.6-3.8 volts kapag white,blue

Example: To use a red led sa 12 volts na power supply.

(12V-2.8V)/0.020A = 460 Ohms

tnx boss electron mapapalaban nanaman me sa math computation hehe

animas22 · « **Reply #6 on:** March 09, 2012, 09:00:25 AM »

Quote from: Ate Shey on March 14, 2008, 12:03:50 PM

Ah ibang usapan na yan.. Use this formula:

(Vin-Vled)/0.020 = Resistor Value [ 0.020A current para sa LED ]

Vled = 2.8 volts kapag red,yellow,green Vled= 3.6-3.8 volts kapag white,blue

Example: To use a red led sa 12 volts na power supply.

(12V-2.8V)/0.020A = 460 Ohms

sa 12v regulated ok yan. sukatin mo ang output ng power supply mo bka 16v peak rms yan madaling masusunog ang led mo. kasi kadalasan 1KOhms ang nilalagay sa led.
V=IR simple ohms law.

Tukkar · « **Reply #7 on:** March 09, 2012, 05:18:11 PM »

afaik, red led is 1.6v...dunno about the high brightness types

01110011 · « **Reply #8 on:** March 09, 2012, 06:08:19 PM »

ohm's law

??? · « **Reply #9 on:** March 09, 2012, 06:24:14 PM »

nabuhay

j a y k e z · « **Reply #10 on:** March 09, 2012, 06:29:24 PM »

anak ng ........ hehehhee

noob days

zrehtiek/keitherz · « **Reply #11 on:** March 10, 2012, 12:48:09 AM »

Philippine Electronics Forum · « **Reply #11 on:** March 10, 2012, 12:48:09 AM »

Philippine Electronics Forum