Green Lantern
Newly Enlightened
- Joined
- Dec 13, 2007
- Messages
- 69
Edit: I think this might be posted in the wrong section. Will a moderator move this thread to the flashlight electronics: batteries included section? Thanks!
I am currently in the process of building a custom flashlight. I will post all the schematics in the homemade & modified lights section, along with pictures of the completed flashlight and beamshots, (duh ) when I complete the flashlight.
In this flashlight I am going to use 2 3V CR123A batteries, and a heatsunk Luxeon K2 Star (130 Lumens). The specifications of this LED are as follows:
Max Continuous Current 1500 mA
Forward Voltage: 3.85 Vf
More info here: http://www.luxeonstar.com/item.php?id=2213&link_str=1431&partno=5027-PW14
Do I need a resistor for this LED? I know ohms law, but when ever I try to make the calculation I get a ridiculously small number for a resistor. I have tried online resistor calculators, and they recommend I use a resistor with a high wattage.
What size resistor do I need to use? Should I use a voltage regulator? A power driver? How does this all work?
Thanks! :laughing:
I am currently in the process of building a custom flashlight. I will post all the schematics in the homemade & modified lights section, along with pictures of the completed flashlight and beamshots, (duh ) when I complete the flashlight.
In this flashlight I am going to use 2 3V CR123A batteries, and a heatsunk Luxeon K2 Star (130 Lumens). The specifications of this LED are as follows:
Max Continuous Current 1500 mA
Forward Voltage: 3.85 Vf
More info here: http://www.luxeonstar.com/item.php?id=2213&link_str=1431&partno=5027-PW14
Do I need a resistor for this LED? I know ohms law, but when ever I try to make the calculation I get a ridiculously small number for a resistor. I have tried online resistor calculators, and they recommend I use a resistor with a high wattage.
What size resistor do I need to use? Should I use a voltage regulator? A power driver? How does this all work?
Thanks! :laughing:
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