2010년 1월 2일 토요일

LED series/parallel array wizard

LED series/parallel array wizard

The LED series/parallel array wizard is a calculator that will help you design large arrays of LEDs. TheLED calculator was great for single LEDs--but when you have several, the wizard will help you arrange them in a series or combined series/parallel configuration. The wizard determines the current limiting resistor value for each portion of the array and calculates power consumed. All you need to know are the specs of your LEDs and how many you'd like to use.

 Source voltage Help
 diode forward voltage Help
 diode forward current (mA) Help
 number of LEDs in your array
View output as:  ASCII  schematic  wiring diagram Help
 help with resistor color codes


Solution 0: 8 x 1 array uses 8 LEDs exactly

+12V
+-|>|--|>|--|>|--|>|--|>|--|>|--|>|--|>|--/\/\/\-+R = 1 ohms
The wizard says: In solution 0:
  • each 1 ohm resistor dissipates 0.4 mW
  • the wizard thinks 1/4W resistors are fine for your application Help
  • together, all resistors dissipate 0.4 mW
  • together, the diodes dissipate 240 mW
  • total power dissipated by the array is 240.4 mW
  • the array draws current of 20 mA from the source.


Solution 0: 8 x 13 array uses 104 LEDs exactly

+12V
+-|>|--|>|--|>|--|>|--|>|--|>|--|>|--|>|--/\/\/\-+R = 1 ohms
+-|>|--|>|--|>|--|>|--|>|--|>|--|>|--|>|--/\/\/\-+R = 1 ohms
+-|>|--|>|--|>|--|>|--|>|--|>|--|>|--|>|--/\/\/\-+R = 1 ohms
+-|>|--|>|--|>|--|>|--|>|--|>|--|>|--|>|--/\/\/\-+R = 1 ohms
+-|>|--|>|--|>|--|>|--|>|--|>|--|>|--|>|--/\/\/\-+R = 1 ohms
+-|>|--|>|--|>|--|>|--|>|--|>|--|>|--|>|--/\/\/\-+R = 1 ohms
+-|>|--|>|--|>|--|>|--|>|--|>|--|>|--|>|--/\/\/\-+R = 1 ohms
+-|>|--|>|--|>|--|>|--|>|--|>|--|>|--|>|--/\/\/\-+R = 1 ohms
+-|>|--|>|--|>|--|>|--|>|--|>|--|>|--|>|--/\/\/\-+R = 1 ohms
+-|>|--|>|--|>|--|>|--|>|--|>|--|>|--|>|--/\/\/\-+R = 1 ohms
+-|>|--|>|--|>|--|>|--|>|--|>|--|>|--|>|--/\/\/\-+R = 1 ohms
+-|>|--|>|--|>|--|>|--|>|--|>|--|>|--|>|--/\/\/\-+R = 1 ohms
+-|>|--|>|--|>|--|>|--|>|--|>|--|>|--|>|--/\/\/\-+R = 1 ohms
The wizard says: In solution 0:
  • each 1 ohm resistor dissipates 0.4 mW
  • the wizard thinks 1/4W resistors are fine for your application Help
  • together, all resistors dissipate 5.2 mW
  • together, the diodes dissipate 3120 mW
  • total power dissipated by the array is 3125.2 mW
  • the array draws current of 260 mA from the source.




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