I have a Ryobi 18V incandescent flashlight/work light. I'm thinking of using one of those car cigar port USB adapters (one with a buck driver in it) to do two things.
I ordered a couple XM-L2 leds, and a Nanjg AK47 driver in 1050ma, and 1400ma. I'm told it can handle 6V, so it shouldn't have a problem with 5.05V from the buck driver.
Here's some information:
The XM-L2 forward voltage is 3.05V @ 1500ma
So I plugged Into a calculator..
http://led.linear1.org/1led.wiz
source V... 5.05V
Forward V.... 3.05V
Diode forward current (ma) ... 1500
The wizard recommends a 3.4 Watt capable or greater 1.5 ohm resistor. The color code for 1.5 ohms is brown green gold.
Link to this solution: http://led.linear1.org/1led.wiz?VS=5.01;VF=3.05;ID=1500
Here's my question:
If I didn't want to get the multi-mode Nanjg driver, but would rather just have one mode.... on and off, would putting a 1.5 ohm resistor inline, after the buck driver, drive the emitter at 1500ma?
- to allow me to use the 18V lithium battery pack as a power bank
- to give me a 5.05 Volt source to power an LED instead of the incandescent bulb.
I ordered a couple XM-L2 leds, and a Nanjg AK47 driver in 1050ma, and 1400ma. I'm told it can handle 6V, so it shouldn't have a problem with 5.05V from the buck driver.
Here's some information:
The XM-L2 forward voltage is 3.05V @ 1500ma
So I plugged Into a calculator..
http://led.linear1.org/1led.wiz
source V... 5.05V
Forward V.... 3.05V
Diode forward current (ma) ... 1500
The wizard recommends a 3.4 Watt capable or greater 1.5 ohm resistor. The color code for 1.5 ohms is brown green gold.
Link to this solution: http://led.linear1.org/1led.wiz?VS=5.01;VF=3.05;ID=1500
Here's my question:
If I didn't want to get the multi-mode Nanjg driver, but would rather just have one mode.... on and off, would putting a 1.5 ohm resistor inline, after the buck driver, drive the emitter at 1500ma?
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