nztdm
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- Joined
- Jun 18, 2012
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I am powering an M140 diode from 2x18650 in series. I am using an LM317 regulator with constant current circuit.
The problem is, I only get about 1.06A (multimeter in series with laser diode). I am aiming to get about 1.5A.
The LM317T is attached to a huge TO-3 heatsink and barely gets warm.
Im sure it would be a bit over the top to have to find more 1ohm resistors to put in parallel, or is that is what is needed to get 1.5A
Here is my circuit:
The problem is, I only get about 1.06A (multimeter in series with laser diode). I am aiming to get about 1.5A.
The LM317T is attached to a huge TO-3 heatsink and barely gets warm.
Im sure it would be a bit over the top to have to find more 1ohm resistors to put in parallel, or is that is what is needed to get 1.5A
Here is my circuit: