rhd
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- Dec 7, 2010
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After the fun I had here (http://laserpointerforums.com/f38/mistake-netted-me-950mw-405nm-12x-68043.html), my interest in 405s was rekindled. So I grabbed a number of 12x diodes from Hank's closeout thread last month, and decided to have some fun with a few new builds. My first challenge was finding a better driver.
Obviously 1085s were out, since I wanted to hit 600mA with two cells. I took a shot at using a 2xAMC7135 driver (in fact, the same drivers I've used for 635s), but it turned out that 700mA was just a bit too current, and a few diodes died in the process.
Then I found Kiyoukan's new linear drivers with their insanely low dropout (0.5V?) http://laserpointerforums.com/f39/new-linear-driver-st-drive-67549.html. I ordered them unset, and added my own 805 SMD resistors to set the current for a safe (right) current of 600mA.
Amazing! I built two in SH-032 hosts to see how consistently I could build high powered 405s. Using 2x AW IMR 18350 cells, my laser bee measured:
Laser 1: Aixiz (690mW) G1 (825mW)
Laser 2: Aixiz (750mW) G1 (870mW)
On the LaserBee, it takes about 60 seconds to get a reading. By that time, the laser looses a bit of it's power. On an Ophir sensor, which is able to take a reading much faster, I was able to observe peak powers of ~910mW and ~950mW for lasers 1 and 2 respectively.
Not bad! Pretty irresponsible currents to set these diodes to, but they were certainly a lot of fun to build, and I love Kiyoukan's new driver.
Obviously 1085s were out, since I wanted to hit 600mA with two cells. I took a shot at using a 2xAMC7135 driver (in fact, the same drivers I've used for 635s), but it turned out that 700mA was just a bit too current, and a few diodes died in the process.
Then I found Kiyoukan's new linear drivers with their insanely low dropout (0.5V?) http://laserpointerforums.com/f39/new-linear-driver-st-drive-67549.html. I ordered them unset, and added my own 805 SMD resistors to set the current for a safe (right) current of 600mA.
Amazing! I built two in SH-032 hosts to see how consistently I could build high powered 405s. Using 2x AW IMR 18350 cells, my laser bee measured:
Laser 1: Aixiz (690mW) G1 (825mW)
Laser 2: Aixiz (750mW) G1 (870mW)
On the LaserBee, it takes about 60 seconds to get a reading. By that time, the laser looses a bit of it's power. On an Ophir sensor, which is able to take a reading much faster, I was able to observe peak powers of ~910mW and ~950mW for lasers 1 and 2 respectively.
Not bad! Pretty irresponsible currents to set these diodes to, but they were certainly a lot of fun to build, and I love Kiyoukan's new driver.
