KJmakeitrain
Newly Enlightened
- Joined
- Nov 4, 2013
- Messages
- 9
Hi All, I am building a Spot beam IR LED Flash light with an aspheric lens.
Parts:
Osram SFH 4783 IR LED DATASHEET
1 x 18650 Orbtronic battery 3.7v
1500ma constant current LED driver based on
Parts:
Osram SFH 4783 IR LED DATASHEET
1 x 18650 Orbtronic battery 3.7v
1500ma constant current LED driver based on
7135 x 4 (Linear Regulator) and Attiny13A (PWM Microcontroller) LED DRIVER
The datasheet says the IR is Forward V 1.65v @ 1000ma max, but can handle surges of 2000ma @ 1.9v
Questions:
If I want to run this at 1000-1200ma, can I / Should I use a resistor in between the driver and the LED?
Can I run it at 1500ma if I have a big enough heat sink? (I'm not as concerned with LED life as this will only be used a few minutes at a time)
I am familiar with using the resistor calculator, but not sure if that's relevant while using a driver?
Can someone please explain how best to set this up?
Thank you,
Newbie
The datasheet says the IR is Forward V 1.65v @ 1000ma max, but can handle surges of 2000ma @ 1.9v
Questions:
If I want to run this at 1000-1200ma, can I / Should I use a resistor in between the driver and the LED?
Can I run it at 1500ma if I have a big enough heat sink? (I'm not as concerned with LED life as this will only be used a few minutes at a time)
I am familiar with using the resistor calculator, but not sure if that's relevant while using a driver?
Can someone please explain how best to set this up?
Thank you,
Newbie