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

LPF Donation via Stripe | LPF Donation - Other Methods

Links below open in new window

ArcticMyst Security by Avery

Help for linear driver






Arayan

Arayan

0
Joined
Oct 26, 2009
Messages
1,746
Points
48
In your opinion it might work in this way?

Thanks again :)

attachment.php
 

Attachments

  • Driver.jpg
    Driver.jpg
    76.2 KB · Views: 2,136
rhd

rhd

0
Joined
Dec 7, 2010
Messages
8,475
Points
0
Arayan said:
In your opinion it might work in this way?

Thanks again :)

attachment.php
Click to expand...

Hey,

The only thing to be aware of is that your resistor (68ohms) will only result in a current of 18mA.

1.25 / 68 = 0.018 A

BTW - I haven't heard back from you via email in a while.
 
Arayan

Arayan

0
Joined
Oct 26, 2009
Messages
1,746
Points
48
Thanks, My intention is to obtain 1.8 A, and I don't understand why I found these instructions for a 445 nm diode.
attachment.php


PS: I call directly to the customs, but never responds... I think it's lost! If you want you can send me a mosquito for compensation :D J/K
 

Attachments

  • pic.jpg
    pic.jpg
    81.4 KB · Views: 600
Blord

Blord

0
Joined
Dec 24, 2007
Messages
5,356
Points
0
Where do you put the laser diode ? And at 1.8A you need a stronger resistor, at least 2W resistor
 
Last edited:
benmwv

benmwv

0
Joined
Sep 10, 2010
Messages
1,380
Points
48
Its probably supposed to be .68 ohms, for ~1.8A.

According to the color code (black blue gray silver brown), it is .68 ohms.
 
rhd

rhd

0
Joined
Dec 7, 2010
Messages
8,475
Points
0
Arayan said:
PS: I call directly to the customs, but never responds... I think it's lost! If you want you can send me a mosquito for compensation :D J/K
Click to expand...

Sounds good :)

I only have 1W (measured, verified, real output) on hand - that cool?

I'll need you to shoot me your address again.

Cheers
 
Arayan

Arayan

0
Joined
Oct 26, 2009
Messages
1,746
Points
48
benmwv said:
Its probably supposed to be .68 ohms, for ~1.8A.

According to the color code (black blue gray silver brown), it is .68 ohms.
Click to expand...

I thought the same thing, but on ebay they have declared as 68 ohms, and I don't remember the color code, but now I'm going to review :)
 
Arayan

Arayan

0
Joined
Oct 26, 2009
Messages
1,746
Points
48
rhd said:
Sounds good :)

I only have 1W (measured, verified, real output) on hand - that cool?

I'll need you to shoot me your address again.

Cheers
Click to expand...

Thanks, I truly appreciate this...you have a mail :)
 
Cyparagon

Cyparagon

0
Joined
Sep 12, 2007
Messages
9,399
Points
113
I was about to comment on the incorrect size and position of the pot, but then I realized you were pretending it was a laser diode :D
 
Arayan

Arayan

0
Joined
Oct 26, 2009
Messages
1,746
Points
48
Cyparagon said:
I was about to comment on the incorrect size and position of the pot, but then I realized you were pretending it was a laser diode :D
Click to expand...

ok, maybe it could be better this way ;)
attachment.php
 

Attachments

  • Driver2.jpg
    Driver2.jpg
    71.1 KB · Views: 921
lasersbee

lasersbee

0
Joined
Sep 20, 2008
Messages
17,622
Points
113
Here is a clearer drawing of the Current regulated circuit..
Just change the Resistor Values to what you require...
The LM350 has the same pinouts....

LM317%20components01.jpg



Jerry
 
Arayan

Arayan

0
Joined
Oct 26, 2009
Messages
1,746
Points
48
lasersbee said:
Here is a clearer drawing of the Current regulated circuit..
Just change the Resistor Values to what you require...
The LM350 has the same pinouts....

LM317%20components01.jpg



Jerry
Click to expand...

Thanks Jerry, but there are too many components to be inserted into a host :D

BTW I measured the resitor with a tester: 0.7 ohms ;)
 
Last edited:
You must log in or register to reply here.




Top