Zwilliamo
01-02-2016, 09:37 AM
I decided to practice my soldering and wiring techniques on a PVC stunt saber before ruining a sound card. Other than a few parts being out of stock, I was almost done with the project until I ran into a possible issue.
The resistor, when ran for more than a minute, is getting hot to the touch. Hot as in "I can't keep my finger on it for more than a few seconds".
I've read that the resistor should only really get 'warm'. I've also metered my full charged Li Ion at 4.13v, yet most everyone seems to calculate resistors at the rated voltage.
Do I need to:
1]Up the resistor to a 1.5 ohm/2 watt to compensate for the higher full charge? or
2]Up the watt rating of the resistor to match Fv of the LED (3 watts)?
I am using:
Amber Cree XP-E2 CopperNova (2.65Fv @ 1000mA)
1.2 ohm/2 watt resistor
3.7 Li Ion single cell
Latching guarded switch
Any insight is greatly appreciated!
The resistor, when ran for more than a minute, is getting hot to the touch. Hot as in "I can't keep my finger on it for more than a few seconds".
I've read that the resistor should only really get 'warm'. I've also metered my full charged Li Ion at 4.13v, yet most everyone seems to calculate resistors at the rated voltage.
Do I need to:
1]Up the resistor to a 1.5 ohm/2 watt to compensate for the higher full charge? or
2]Up the watt rating of the resistor to match Fv of the LED (3 watts)?
I am using:
Amber Cree XP-E2 CopperNova (2.65Fv @ 1000mA)
1.2 ohm/2 watt resistor
3.7 Li Ion single cell
Latching guarded switch
Any insight is greatly appreciated!