MetkuMods
Rescalc
Current limiting resistor calculator


v1.5 03.10.2006 Led GURU launched!
v1.4 25.08.2006 Current limit upped to 2000mA to support Luxeon and other high power leds.
v1.3 09.06.2006 New graphics + help options
v1.2 21.03.2006 Resistor color codes added
v1.1 31.05.2003 Opera support
v1.0 08.05.2003 Initial release


Some good values to try:

As supply voltage:
 For molex: 5, 7 and 12 volts
 Batteries: 1.5 and 9 volts

As led forward voltages:
 Red and green: 2 volts
 Blue and white: 3.5 - 4 volts

Led current:
 20mA will work for most leds.

.:Single led

Supply Voltage
  VOLTS
Voltage Drop Across LED
  VOLTS
Desired LED Current
  MILLIAMPS

 
Single led with single resistor
Calculated Limiting Resistor
  OHMS
Nearest higher rated 10% resistor
 
Calculated Resistor Wattage
  WATTS
Safe pick is a resistor with power rating of
  WATTS



.:Leds in series

Supply Voltage
  VOLTS
Voltage Drop Across LED
  VOLTS
Desired LED Current
  MILLIAMPS
How many leds connected
 

 
Several leds in series with one resistor
Calculated Limiting Resistor
  OHMS
Nearest higher rated 10% resistor
 
Calculated Resistor Wattage
  WATTS
Safe pick is a resistor with power rating of
  WATTS



.:Leds in parallel

Supply Voltage
  VOLTS
Voltage Drop Across LED
  VOLTS
Desired LED Current
  MILLIAMPS
How many leds connected
 

 
Several leds connected parallel with one resistor
Calculated Limiting Resistor
  OHMS
Nearest higher rated 10% resistor
 
Calculated Resistor Wattage
  WATTS
Safe pick is a resistor with power rating of
  WATTS



You can find the new and improved GURU at http://www.ledcalc.com/ !

.:GURU

Supply Voltage
  VOLTS
Voltage Drop Across LED
  VOLTS
Desired LED Current
  MILLIAMPS
How many leds connected
 

 
Guru suggestion
Calculated Limiting Resistor R1
  OHMS
Nearest higher rated 10% resistor
 
Calculated Resistor Wattage
  WATTS
Safe pick is a resistor with power rating of
  WATTS
Calculated Limiting Resistor R2
  OHMS
Nearest higher rated 10% resistor
 
Calculated Resistor Wattage
  WATTS
Safe pick is a resistor with power rating of
  WATTS


 
  Content in english!
  Sisältö suomeksi!

 Google

 .:Notice!
En ota mitään vastuuta tuhoutuneesta tai hajonneesta laitteistosta tai sen osasta.

Disclaimer! I will not take any responsibility for any destroyed or damaged hardware.




Add to Technorati Favorites
add
add
add
add
add

 .:Back to top Bandwidth by Mpoli

Copyright © Metku.net, All Rights Reserved.
All content and graphics in MetkuMods are sole property of Jani Pönkkö and may not be reproduced or copied in any manner without written permission from him.
All brand names, trademarks and copyrights are the property of their respective owners.Privacy Policy