Author Topic: Will this work?  (Read 1073 times)

Offline Shadowkillazz

  • Guppy
  • *
  • Posts: 6
  • Post quality +0/-0
  • Gender: Male
  • Acidmods User
Will this work?
« on: April 06, 2009, 10:21:20 PM »
If i use this to run my leds will it work here is the info:

supply voltage                          5 volts
voltage drop across led                 4.5 volts
Desired led Current                     20 milliamps
Led's Connected                         32


Exact Calculated resistance             25 OHMS
Nearest higher rated resistor           27 OHMS
Wattage reccomended for the resistor    1/8 WATTS
Actual single Led Current               18.5 mA
Power dissapated by Led                 83 mW
Power dissipated by the resistor        9 mW
Circuit's total current consumption     592.6

Offline bustinthejustin

  • Registered BST
  • E = MC² Mad Scientist
  • *
  • Posts: 2326
  • Post quality +1/-0
  • Gender: Male
Re: Will this work?
« Reply #1 on: April 07, 2009, 02:01:38 PM »
you have 4.5v leds, and you plan on connecting 32 of 'em?

Sig by Kenshinffx - Thanks!

Offline Shadowkillazz

  • Guppy
  • *
  • Posts: 6
  • Post quality +0/-0
  • Gender: Male
  • Acidmods User
Re: Will this work?
« Reply #2 on: April 07, 2009, 04:01:06 PM »
idk but i think i figured it out i read the leds and they say they use 20 mah and the battery says it has 2400 so i think its ok idk wat happened with that i just typed the above info into a led current calculator. but i found a tut later and said that same resistor info so i think it will work. i dont think they are 4.5 volts.

 

SMF spam blocked by CleanTalk
SimplePortal 2.3.5 © 2008-2012, SimplePortal