Welcome to Laser Pointer Forums - discuss green laser pointers, blue laser pointers, and all types of lasers

How to Register on LPF | LPF Donations

Pyro-Drive 405nm Driver / Sale Thread

Read his post again.
The ripple is measured in mV not mA.

Tech_Junkie said:
So if I wanted one set to 90ma for use with a PHR, and it pushed it to 110mA, the PHR is not in danger if its a low efficiency diode? Serious question here.

How about a 6X? A 210mA jump from 190mA could easily kill the diode, if not making the life shorter.
Click to expand...
 





I read it 3 times. I dont understand were the + / - 20mA applies. Is he saying he cant set to exactly what you want because it has a 40mA swing?
 
Tabish said:
Read his post again.
The ripple is measured in mV not mA.
Click to expand...

LOL, yeah that got me confused, he didnt quote what he was reffering too.... I corrected my above post.

Tech_Junkie said:
I read it 3 times. I dont understand were the + / - 20mA applies. Is he saying he cant set to exactly what you want because it has a 40mA swing?
Click to expand...

No swing... read the correction..
 
I think what wannaburn said in his 1st post (correct me if I misunderstood)
was that he could set the output of the driver within +/- 20mA of what you wanted...

I would think that.. that should be tightened down a bit...
If I wanted a 110mA driver I would not want a 140mA or 90ma
showing up...

Just my
2c.gif
 
lasersbee said:
I think what wannaburn said in his 1st post (correct me if I misunderstood)
was that he could set the output of the driver within +/- 20mA of what you wanted...

I would think that.. that should be tightened down a bit...
If I wanted a 110mA driver I would not want a 140mA or 90ma
showing up...

Just my
2c.gif
Click to expand...

Its only an issue at higher currents, setting for a PHR, I have tons of resistors and can get it within a mA or two.

But for people who request 304mA, lol I will most likely not have a correct value resistor on hand to get it bang on.


As I said, I will be focusing on the most common currents used, 80mA, 90mA, 110mA, 190mA 290mA and so on.




*Edit* Okay no more tolerance talk, I will be ordering an assortment of resistors tonight, so its going to be + / - 2mA to any requested mA within the bound of the above specs.
 
Last edited:
First I must say the drivers look very nice, the PCB is very stylish :)

I was reading the other thread where you seemed to have a bit of a disagreement with another member, but I think that was down to who owns what in which schematic.

I will wait for a few tests of your drivers to be done before I purchase any but I do look forward to owning one as they look very nice, and seem to work well from what I have read.

Although I must ask, if you have to individually change the resistor on each driver, and you get bogged down with orders will it not be potentially very difficult to keep up? As with most other drivers they have a pot so they get built and shipped. I don't know much about electronics beyond a certain level, so I must ask is it not possible for you to potentially replace the resistors with a potentiometer? This would also allow us to re-use a driver with another diode if an old one dies. (Please excuse my lack of knowledge if this isn't possible :))
 
I’m working on a pot for this actually right now. I have used these in hundreds of builds, and for the most part with lower current diodes, no higher than 6x and under 240mA.

The challenge with this driver and setting the current is in the range from 193mA and up. When setting the current for 193ma, it’s as simple as a 1ohm resistor. Above 193ma the current has to be set with resistors at 1/10th of an ohm etc.

Ex. To get 393mA a .49R is used, and for 402ma a .48R is used.

The problem with using a pot is the current has to pass through the resistor as is, so a combination of pot and resistor has to be used to take the load off the pot. This is something that would make it easier, but not necessarily better. The fixed resistor is much more reliable over long term. But is still doable.

I’m ordering more resistors to try and broaden the range of selectable currents.





@Tabish

For the 12x, I will have to see what the vf and current requirements turn out to be. As of now it can deliver what the 8x’s are running at. So for the 12x is anybody’s guess.

It will meet the requirements of voltage with no problems up to 25v, but the current may present an issue over 300-350mA if the vf of a 12x exceeds 7-8v. This would be a heat issue, but will be testing some work a rounds for that soon.
 
Last edited:
Not unless its attached to an LD. I hand assemble in small batches and really just use them in modules and pens.

Though if interested, I can sell you a few boards and parts to go on them for a better price.
 
How much would it be for one kit? And I have purchased something from you before :) (check the sig)
Jimmymcjimthejim
 
I will be assembling a new batch, I will post when they are ready. Have some other things to take care of first, and got to squeeze them in.

Ive also been testing with a 12x, the drivers work well even at 502mA, just not sure how long the LD will hold up at that current..
 
Ok, but do you have any ready to ship now? I have a build I'd like to complete as soon as possible.
Thanks,
Jimmymcjimthejim
 
You must log in or register to reply here.


Back
Top