well I bought one driver from dx and I have a 445nm diode and a 18650 battery. What should I do to drive this diode. I mean where to put the resistor and the diodes and also what connection should I do for this to work. Can this driver replace the flexdrive
Welcome to the forums.
This 3 mode driver is cheap and nice.
1. Examine the driver board.
If there is no connection between c1 and LD(+), solder to fix as above picture.
2. Set the current with test load.
You must set the "pot" for the proper current. After each setting of pot, you should check the current of test load "several times" for 3 modes(or 5 modes) of the driver. When max 1200mA+, finish the setting.
You can search to find the threads of test load elsewhere. This link of my previous thread for high current test load may be helpful:
Test load is for the simultion of LD.
You can simulate with test load and determine the current and voltage of the driver for the LD.
If you are a starter, you'd better trying first with cheap LOC or PHR.
Everybody can fail at the first time..
And there are many sharing informations and trial-and-error stories in this forum.
You can search any time and make your knowledge.
Well i have already built a 405nm laser with homemade driver and I also have a 650nm 200mw laser powered from pc power supply and an IR laser. I have some experience in lasers...Thanks for the info though.
The only part of the driver that was touching the host was the outer ring (negative input). I ran the laser for about 25-35 minutes with no problem.
On a dummy load the driver ran 1385-1395mA for 2 minutes so I hooked 'er up.
It was fun while it lase-ted but died after I charged up the 16340s
Yeah, it wasn't kipkay connected (direct connected :na: )
I didn't bother with the case pin but didn't isolate the diode so it was basically case negative to the diode. I tried the diode afterward on a dll driver and still no joy so I know it is dead lol.
Oversized heatsink and I never had it on for longer than 20 seconds per hour (not intentional, just didn't use it much at a time)
Like I said, the laser worked for quite a time but died within about 10 seconds of charging the batteries. The voltage after the charger was 4.12v and I let them sit for a few hours the came to about 4v apiece. The driver was heatsinked in the same piece of aluminum but only the tops of each amc7135 chip actually touched the heatsink, a bit of thermal paste to make sure of a good thermal connection on there as well.
I think that is all of the pertinent info but if there is more info needed just ask. I was pretty careful and took some notes as it was my 1st 445 build.
This cheap flashlight boost converter looks great....
It's perfect for cheap 445nm builds and that is what I aim for. (Don't like to waist 26USD on microboost)
Only thing that worries me is stability of this driver.
Is it enough to put two capacitors at driver's output? (small capacity capacitor for small spikes and bigger capacity capacitor for larger spikes).
Has anyone tried to use capacitors on driver's output? How driver reacts on capacitors?
I would hardly call buying an actual known good driver like the microboost a waste of money.. I'd rather spend a bit more myself on a good driver, than to use cheap drivers and risk diodes that cost twice as much.