Alright so I have built a linear driver using a LM1085 voltage regulator and 2x 1 ohm resistors in parallel using a m140 2w laser diode being ran by 3x 3.7v 2500mAh 18650 (from panasonic). (also has a cool missile launch style rocker switch )
Here's kind of a picture of what i have so far.. It's not pretty... This shows the underside. Imgur: The most awesome images on the Internet
So i went to test it out for the first time today and I'm having some problems and hoped someone could help me solve them.
When i turned it on the diode lit up but it was very weak? it shot out a dot at what it was hitting very focused in the center but a blue ring on the outside? like a target sign and you could not see the actual beam even when it was pitch black in the room. The batteries were fully charged (brand new first time being used) So I'm lost as to what the problem could be.
Here's kind of a picture of what i have so far.. It's not pretty... This shows the underside. Imgur: The most awesome images on the Internet
So i went to test it out for the first time today and I'm having some problems and hoped someone could help me solve them.
When i turned it on the diode lit up but it was very weak? it shot out a dot at what it was hitting very focused in the center but a blue ring on the outside? like a target sign and you could not see the actual beam even when it was pitch black in the room. The batteries were fully charged (brand new first time being used) So I'm lost as to what the problem could be.