DIY Homemade laser diode driver

[Gazoo]

Very nice...I really like everything about those pics...well done

 

[pwnstar]

is the Potentiometer sopost to change my voltage?
i hooked up 4 AA batterys and thats giving 6.5 volts at the end where the laser will soon go its at 5.5 volts..  i must be shorting sumthing that seems high

yea btw sweet pics^

 

[rog8811]

have you put a load where the LD is going to be?
If you have built the DDL circuit the pot changes the current.....

Regards rog8811

 

[pwnstar]

the pot was not changeing the curent that just cunfused me.
i realised that i miss read the pins on the LM317 go
(correct me if im wrong)
 ___
/_O_\
|       |
|____|
|  |  |
2,3,1

got to re-do that :-/
that should fix the voltage problem and have the pot start working

 

[rog8811]

I feel another picture coming on

Regards rog8811

 

[toked323]

yea i have a v and i meter i am suppling the circuit with 6v as in the schematic ill try the 1 ohm should i connect the 1 ohm straight to the LD thanks ;D

 

[pwnstar]

rog8811, thanks for getting back so soon
I found that same pic online but on his schematic on the first page of this forum he lables

1-in
2-adj
3-out

as oppose to the pic up there^
1-adj
2-out
3-in

 

[Gazoo]

Go by Rog's picture. It is correct.

 

[Daedal]

rog8811, thanks for getting back so soon
I found that same pic online but on his schematic on the first page of this forum he lables

1-in
2-adj
3-out

as oppose to the pic up there^
1-adj
2-out
3-in

The schematic showed the chip and the connections. The breadboard pic showed the pins Not to mention the back of the RS package shows that too

--DDL

 

[pwnstar]

ok thanks i understand it now
dam now i have to un-do my re-do....
radio shack didnt have it labled on the back of there packaging thats what confused me

 

[Archane]

Knasterpijp which MXDL are you using? the 3xAA or the 1xCR123 one? i'm still trying to figure out which host light I wanna use.

 

[Knasterpijp]

Knasterpijp which MXDL are you using? the 3xAA or the 1xCR123 one? i'm still trying to figure out which host light I wanna use.

2x cr123
This one: http://www.dealextreme.com/details.dx/sku.4171  

 

[pwnstar]

in the end how many volts am i sopost to see coming out of this
im getting 5.44

 

[Knasterpijp]

in the end how many volts am i sopost to see coming out of this
im getting 5.44

i think that's ok, with fresh batteries its about 6 volts

 

[o_DEATH_ANG3L_o]

Why was this topic un-stickied? Oh duh nvm it is in "Threads of Interests" anyway.

 

[High_Octane]

O.K. I'm jumping in on this, and I have a few questions before I order the needed Components.
Take a look at the list of components in the pic.

• Is there anything incorrect?

• is there anything you would change?

• If so Why?

Thanks.