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



Laser Pointer Store

dorcy jr driver can power flex drive??

Mohrenberg

New member
Joined
Aug 30, 2008
Messages
6,927
Likes
412
Points
0
i was looking through a thread and realised i had screwed up on a set of lasers i helped a forum memeber with...

i built a red and BR from a GGW sled for a member, and totally forgot to strip the components off the stock driver, so the stock driver is still intact on the set of dorcy jr lasers....

so basicly the flex drive is being powered by the dorcy jr driver.

i'm just curious if the dorcy jr stock driver outputs enough voltage and current to properly run a flex drive......

basicly so i know if these lasers need to get fixed.
 

Meatball

New member
Joined
Feb 1, 2008
Messages
2,989
Likes
172
Points
0
I heard that the Dorcy driver is capable of about 800mA for the LED, but I've also read of people have under-powering problems due to the stock driver being still in tact. Best not to quote me on either, but I've read both from past threads.
 

dr-ebert

New member
Joined
Mar 8, 2009
Messages
713
Likes
15
Points
0
Normal white-light LEDs use around 3.7V and up to 800mA, which would be enough. Except that drivers are normally constant-current drivers. This means the native driver would try to feed a possibly much higher current to the FD, but since the FD would only accept a certain current (the one set on it), the native driver would increase the output voltage up to its maximum - no idea where that is. So, in the end it's a bit chancy. Also the added driver would mean reduced efficiency.
 

chipdouglas

Well-known member
Joined
Dec 23, 2008
Messages
4,011
Likes
190
Points
63
this is just input for inputs sake. I have one of those dorcy led's and there is no driver in it. just a resistor.
 

chipdouglas

Well-known member
Joined
Dec 23, 2008
Messages
4,011
Likes
190
Points
63
@meatball.... alas, i mean no driver.(i have one but the whole project is in pieces right now) i am having a heck of a time putting it all together. i have already fired 5 phrs. scopeguy can attest to that.
 

daguin

New member
Joined
Mar 29, 2008
Messages
16,636
Likes
623
Points
0
I did this with my very first Dorcy. It had significant output issues.

I would get the stock driver out of there.

Make sure that they re-set the FD with a dummy.

Peace,
dave
 




Top