Help me with Laser problem plz

I got Kes400A laser diode(4 legs weak one)
and i made my driver but using 100k ohm pot instead of 100 ohm pot
other than that is normal
but when i connect battery to driver laser just blink for 0.00001 sec and gone
i DC and connect again and it be the same
what is my prob???

thank you very much

Hello and welcome to the forum!:wave:

What do you mean when you say "normal"?
A 100.000 Ohm potentiometer will not let enough current through to your diode....

my driver is everything like this one
DIY: How To Make A Laser Diode Driver Circuit - Video
but i use 3362 trimmer for pot and i think it's 100k ohm
this is my guess
i use 9v battery so maybe it's too high and my driver cut it down
it's just my guess i am noob

thank you for reply

Forgive me for not watching that 9 minutes video.
Have you read this site yet? If not, you should.
Laser driver - It can be done

Thepolnw said:

I got Kes400A laser diode(4 legs weak one)
and i made my driver but using 100k ohm pot instead of 100 ohm pot
other than that is normal
but when i connect battery to driver laser just blink for 0.00001 sec and gone
i DC and connect again and it be the same
what is my prob???

thank you very much

Click to expand...

The Video you linked to says to use a 25 Ohm Pot...
Why are you using a 100K pot...

It is like a recipe asking to add 1 teaspoon of salt to the
soup recipe any you decide to add 10 pounds instead.
Instructions and part descriptions are there for reasons.

As was already pointed out... You need to spend some
time researching and reading on the Forum...

You can start by reading the FAQs and the Tutorials..

BTW... welcome to the Forum...


Jerry

I have read it and thanks for the link

If I put in high Volt battery in to my driver, what is gonna happen?
is it gonna burn my laser?

and if i use 100k ohm instead of 25 it just gonna be hard to adjust right?

sorry for post on the wrong place
I am new