Laser pointer discussion. Read/write reviews of laser pointers and laser pointer companies. Learn about all types of laser pointers and lasers





Welcome to Laser Pointer Forums! If you are looking for a laser pointer or want to compare different laser pointer companies, you may want to check out the LPF Laser Pointer Company Database. The link will open in a new window for your convenience.








Green Laser Pointers by Category Blue Laser Pointers by Category Red Laser Pointers by Category
Yellow Laser Pointers by Category Violet Laser Pointers by Category Orange Laser Pointers by Category
Top Laser Pointers by Power - 1 Watt+ Top Laser Pointers by Power - 500mW+ Top Laser Pointers by Power - 250mW+
Laser Pointer Database High Power Laser Pointers Laser Pointer Diodes
Laser Technology Laser Pointer Parts Lasers by Wavelength
Top 10 Laser Pointer Companies Laser Pointer Company Database Visible Beam Laser Pointers


One laser store meets all your needs

























Go Back   Laser Pointer Forums - Discuss Laser Pointers > Lasers > Tutorials, Help & Repairs



LPF List of Laser Pointer Companies (link opens new window)



Reply
 
LinkBack Thread Tools Display Modes
Old 07-18-2008, 06:32 PM #1
Class 2 Laser
 
Join Date: Jul 2008
Posts: 281
Rep Power: 12
ArRaY will become famous soon enoughArRaY will become famous soon enough
ArRaY ArRaY is offline
Class 2 Laser
 
Join Date: Jul 2008
Posts: 281
Rep Power: 12
ArRaY will become famous soon enoughArRaY will become famous soon enough
Default Problems with DDL driver - current regulation

Hey everyone, IŽam new to the forums and this is my first post.
Just for information, IŽam 16 years old and iŽam from Germany.

Some time ago, i became interested in lasers, and i started lurking around in this forum,
and in a german one. However, i did not dare to ask my questions in the german one,
because every second one, who is new to lasers, and who is asking a question there gets killed by postings regarding safety.
(I care much about Safety)


I read about the 16x dvd burner diodes, and thought that that would be an easy way to obtain a great, strong red laser.
I purchased some burners, and some lm317 for the driver.

After i got alle the components that i needed, (IŽam new to electronics, so that was like everything :-D(Breadboard,resistors,...))
I wired it up on a breadboard. To test the circuit, i chose to try an led. scince i had it lying around, i took a 100 ohm resistor to test.
That should leave me with 12,5 mA, right?(1,25/100) I power the circuit with a 9V battery. So i wondered why the led was at full brightness and tried a 5k resistor. Again, full brightness. I left the resistor away, and again. Then i thought ADJ and Vout should have 1.25V difference. 0,0V says my DMM. I have no idea what could be wrong, and thus iŽam asking you to look at my circuit if there is something obviously wrong.Thats what i think. But i donŽt see it :-D

I hope someone here sees my mistake

Thanks in advance, ArRaY

Attached Thumbnails
Problems with DDL driver - current regulation-cimg2252.jpg  


ArRaY is offline   Reply With Quote







LPF List of Laser Pointer Companies (link opens new window)







Old 07-18-2008, 06:51 PM #2
FireMyLaser's Avatar
Class 3B Laser
 
Join Date: Jan 2008
Location: Sweden
Posts: 3,052
Rep Power: 567
FireMyLaser has a reputation beyond reputeFireMyLaser has a reputation beyond reputeFireMyLaser has a reputation beyond reputeFireMyLaser has a reputation beyond reputeFireMyLaser has a reputation beyond reputeFireMyLaser has a reputation beyond reputeFireMyLaser has a reputation beyond reputeFireMyLaser has a reputation beyond reputeFireMyLaser has a reputation beyond reputeFireMyLaser has a reputation beyond reputeFireMyLaser has a reputation beyond repute
Send a message via MSN to FireMyLaser
FireMyLaser FireMyLaser is online now
Class 3B Laser
FireMyLaser's Avatar
 
Join Date: Jan 2008
Location: Sweden
Posts: 3,052
Rep Power: 567
FireMyLaser has a reputation beyond reputeFireMyLaser has a reputation beyond reputeFireMyLaser has a reputation beyond reputeFireMyLaser has a reputation beyond reputeFireMyLaser has a reputation beyond reputeFireMyLaser has a reputation beyond reputeFireMyLaser has a reputation beyond reputeFireMyLaser has a reputation beyond reputeFireMyLaser has a reputation beyond reputeFireMyLaser has a reputation beyond reputeFireMyLaser has a reputation beyond repute
Send a message via MSN to FireMyLaser
Default Re: Problems with DDL driver - current regulation

OMG WHAT ARE YOU DOING?! LASERS ARE NOT TOYS!!!!

;D ;D ;D ;D ;D

No, it's cool. Welcome to the forum.

The picture is very big, so it hard to see what's going on, but it looks like the wire from the capacitor goes to the wrong pin on the LM317. Move it to the pin to the left.
__________________
Niko likes cereal.
FireMyLaser is online now   Reply With Quote
Old 07-18-2008, 07:01 PM #3
jamilm9's Avatar
Class 3R Laser
 
Join Date: Jan 2008
Posts: 1,864
Rep Power: 132
jamilm9 has a reputation beyond reputejamilm9 has a reputation beyond reputejamilm9 has a reputation beyond reputejamilm9 has a reputation beyond reputejamilm9 has a reputation beyond reputejamilm9 has a reputation beyond reputejamilm9 has a reputation beyond reputejamilm9 has a reputation beyond reputejamilm9 has a reputation beyond reputejamilm9 has a reputation beyond reputejamilm9 has a reputation beyond repute
jamilm9 jamilm9 is offline
Class 3R Laser
jamilm9's Avatar
 
Join Date: Jan 2008
Posts: 1,864
Rep Power: 132
jamilm9 has a reputation beyond reputejamilm9 has a reputation beyond reputejamilm9 has a reputation beyond reputejamilm9 has a reputation beyond reputejamilm9 has a reputation beyond reputejamilm9 has a reputation beyond reputejamilm9 has a reputation beyond reputejamilm9 has a reputation beyond reputejamilm9 has a reputation beyond reputejamilm9 has a reputation beyond reputejamilm9 has a reputation beyond repute
Default Re: Problems with DDL driver - current regulation

Quote:
Originally Posted by FireMyLaser
OMG WHAT ARE YOU DOING?! LASERS ARE NOT TOYS!!!!

;D ;D ;D ;D ;D

No, it's cool. Welcome to the forum.

The picture is very big, so it hard to see what's going on, but it looks like the wire from the capacitor goes to the wrong pin on the LM317. Move it to the pin to the left.
;D ;D ;D ;D
__________________
Used to have 26 rep points
I am leet
jamilm9 is offline   Reply With Quote
Old 07-18-2008, 07:42 PM #4
Class 2 Laser
 
Join Date: Jul 2008
Posts: 281
Rep Power: 12
ArRaY will become famous soon enoughArRaY will become famous soon enough
ArRaY ArRaY is offline
Class 2 Laser
 
Join Date: Jul 2008
Posts: 281
Rep Power: 12
ArRaY will become famous soon enoughArRaY will become famous soon enough
Default Re: Problems with DDL driver - current regulation

;D ;D ;D ;D ;D ;D ;D ;D ;D ;D

I know. To be honest, i didnŽt dare to hook up a diode to test, scince i have no glasses at the moment.

you sure? which one? the 10”F or the 100”F one?
My 317 is from ON-Semi, pinconfig is :
1 2 3
ADJ Vout Vin
Attached Thumbnails
Problems with DDL driver - current regulation-cimg22521.jpg  
ArRaY is offline   Reply With Quote
Old 07-18-2008, 07:49 PM #5
FireMyLaser's Avatar
Class 3B Laser
 
Join Date: Jan 2008
Location: Sweden
Posts: 3,052
Rep Power: 567
FireMyLaser has a reputation beyond reputeFireMyLaser has a reputation beyond reputeFireMyLaser has a reputation beyond reputeFireMyLaser has a reputation beyond reputeFireMyLaser has a reputation beyond reputeFireMyLaser has a reputation beyond reputeFireMyLaser has a reputation beyond reputeFireMyLaser has a reputation beyond reputeFireMyLaser has a reputation beyond reputeFireMyLaser has a reputation beyond reputeFireMyLaser has a reputation beyond repute
Send a message via MSN to FireMyLaser
FireMyLaser FireMyLaser is online now
Class 3B Laser
FireMyLaser's Avatar
 
Join Date: Jan 2008
Location: Sweden
Posts: 3,052
Rep Power: 567
FireMyLaser has a reputation beyond reputeFireMyLaser has a reputation beyond reputeFireMyLaser has a reputation beyond reputeFireMyLaser has a reputation beyond reputeFireMyLaser has a reputation beyond reputeFireMyLaser has a reputation beyond reputeFireMyLaser has a reputation beyond reputeFireMyLaser has a reputation beyond reputeFireMyLaser has a reputation beyond reputeFireMyLaser has a reputation beyond reputeFireMyLaser has a reputation beyond repute
Send a message via MSN to FireMyLaser
Default Re: Problems with DDL driver - current regulation

Yes, try it.

I mean the 100”F cap. Right now the wire goes to the middle (2) pin.
__________________
Niko likes cereal.
FireMyLaser is online now   Reply With Quote
Old 07-18-2008, 07:55 PM #6
Class 2 Laser
 
Join Date: Jul 2008
Posts: 281
Rep Power: 12
ArRaY will become famous soon enoughArRaY will become famous soon enough
ArRaY ArRaY is offline
Class 2 Laser
 
Join Date: Jul 2008
Posts: 281
Rep Power: 12
ArRaY will become famous soon enoughArRaY will become famous soon enough
Default Re: Problems with DDL driver - current regulation

the cap is the output cap.
i dont think it has to be connected to the input pin, thus having a direct connection to the + 9v, as it is supposed to be parallel to the LD...(tried it. led just lights up like is is directly connected to battery. which it then is, if you look at the board)

:'( so what else could be wrong?
ArRaY is offline   Reply With Quote
Old 07-18-2008, 08:38 PM #7
FireMyLaser's Avatar
Class 3B Laser
 
Join Date: Jan 2008
Location: Sweden
Posts: 3,052
Rep Power: 567
FireMyLaser has a reputation beyond reputeFireMyLaser has a reputation beyond reputeFireMyLaser has a reputation beyond reputeFireMyLaser has a reputation beyond reputeFireMyLaser has a reputation beyond reputeFireMyLaser has a reputation beyond reputeFireMyLaser has a reputation beyond reputeFireMyLaser has a reputation beyond reputeFireMyLaser has a reputation beyond reputeFireMyLaser has a reputation beyond reputeFireMyLaser has a reputation beyond repute
Send a message via MSN to FireMyLaser
FireMyLaser FireMyLaser is online now
Class 3B Laser
FireMyLaser's Avatar
 
Join Date: Jan 2008
Location: Sweden
Posts: 3,052
Rep Power: 567
FireMyLaser has a reputation beyond reputeFireMyLaser has a reputation beyond reputeFireMyLaser has a reputation beyond reputeFireMyLaser has a reputation beyond reputeFireMyLaser has a reputation beyond reputeFireMyLaser has a reputation beyond reputeFireMyLaser has a reputation beyond reputeFireMyLaser has a reputation beyond reputeFireMyLaser has a reputation beyond reputeFireMyLaser has a reputation beyond reputeFireMyLaser has a reputation beyond repute
Send a message via MSN to FireMyLaser
Default Re: Problems with DDL driver - current regulation

Did I get the pinning right in the picture?
1 2 3
ADJ Vout Vin


Do what the red arrow does.

Check for shorts in the green circle.

The voltage between pin 1 and 2 should be 1.25V and the current through the circuit 12.5mA.
__________________
Niko likes cereal.
FireMyLaser is online now   Reply With Quote
Old 07-18-2008, 08:55 PM #8
Class 2 Laser
 
Join Date: Jul 2008
Posts: 281
Rep Power: 12
ArRaY will become famous soon enoughArRaY will become famous soon enough
ArRaY ArRaY is offline
Class 2 Laser
 
Join Date: Jul 2008
Posts: 281
Rep Power: 12
ArRaY will become famous soon enoughArRaY will become famous soon enough
Default Re: Problems with DDL driver - current regulation

ah i see :-D
i mixed up left with right :-D
shame on me^^

yes, pinning is right.

hm. voltage between 1 and 2 is 0.6v ??
There are no shorts in the green circle, but you canŽt see that in the picture.

anyway, thanks for helping
ArRaY is offline   Reply With Quote
Old 07-18-2008, 09:01 PM #9
FireMyLaser's Avatar
Class 3B Laser
 
Join Date: Jan 2008
Location: Sweden
Posts: 3,052
Rep Power: 567
FireMyLaser has a reputation beyond reputeFireMyLaser has a reputation beyond reputeFireMyLaser has a reputation beyond reputeFireMyLaser has a reputation beyond reputeFireMyLaser has a reputation beyond reputeFireMyLaser has a reputation beyond reputeFireMyLaser has a reputation beyond reputeFireMyLaser has a reputation beyond reputeFireMyLaser has a reputation beyond reputeFireMyLaser has a reputation beyond reputeFireMyLaser has a reputation beyond repute
Send a message via MSN to FireMyLaser
FireMyLaser FireMyLaser is online now
Class 3B Laser
FireMyLaser's Avatar
 
Join Date: Jan 2008
Location: Sweden
Posts: 3,052
Rep Power: 567
FireMyLaser has a reputation beyond reputeFireMyLaser has a reputation beyond reputeFireMyLaser has a reputation beyond reputeFireMyLaser has a reputation beyond reputeFireMyLaser has a reputation beyond reputeFireMyLaser has a reputation beyond reputeFireMyLaser has a reputation beyond reputeFireMyLaser has a reputation beyond reputeFireMyLaser has a reputation beyond reputeFireMyLaser has a reputation beyond reputeFireMyLaser has a reputation beyond repute
Send a message via MSN to FireMyLaser
Default Re: Problems with DDL driver - current regulation

What' the current? If it's too low, then get a new 9V battery and check the voltage between pin 1 and 2 again.
It has to be 1.25V or something's wrong!
__________________
Niko likes cereal.
FireMyLaser is online now   Reply With Quote
Old 07-18-2008, 09:05 PM #10
Class 2 Laser
 
Join Date: Jul 2008
Posts: 281
Rep Power: 12
ArRaY will become famous soon enoughArRaY will become famous soon enough
ArRaY ArRaY is offline
Class 2 Laser
 
Join Date: Jul 2008
Posts: 281
Rep Power: 12
ArRaY will become famous soon enoughArRaY will become famous soon enough
Default Re: Problems with DDL driver - current regulation

yaaay! took a new battery and the voltage is 1.24!!
Thanks a lot!!
ArRaY is offline   Reply With Quote
Old 07-18-2008, 09:08 PM #11
FireMyLaser's Avatar
Class 3B Laser
 
Join Date: Jan 2008
Location: Sweden
Posts: 3,052
Rep Power: 567
FireMyLaser has a reputation beyond reputeFireMyLaser has a reputation beyond reputeFireMyLaser has a reputation beyond reputeFireMyLaser has a reputation beyond reputeFireMyLaser has a reputation beyond reputeFireMyLaser has a reputation beyond reputeFireMyLaser has a reputation beyond reputeFireMyLaser has a reputation beyond reputeFireMyLaser has a reputation beyond reputeFireMyLaser has a reputation beyond reputeFireMyLaser has a reputation beyond repute
Send a message via MSN to FireMyLaser
FireMyLaser FireMyLaser is online now
Class 3B Laser
FireMyLaser's Avatar
 
Join Date: Jan 2008
Location: Sweden
Posts: 3,052
Rep Power: 567
FireMyLaser has a reputation beyond reputeFireMyLaser has a reputation beyond reputeFireMyLaser has a reputation beyond reputeFireMyLaser has a reputation beyond reputeFireMyLaser has a reputation beyond reputeFireMyLaser has a reputation beyond reputeFireMyLaser has a reputation beyond reputeFireMyLaser has a reputation beyond reputeFireMyLaser has a reputation beyond reputeFireMyLaser has a reputation beyond reputeFireMyLaser has a reputation beyond repute
Send a message via MSN to FireMyLaser
Default Re: Problems with DDL driver - current regulation

Sehr gut!
__________________
Niko likes cereal.
FireMyLaser is online now   Reply With Quote
Old 07-18-2008, 09:11 PM #12
Class 2 Laser
 
Join Date: Jul 2008
Posts: 281
Rep Power: 12
ArRaY will become famous soon enoughArRaY will become famous soon enough
ArRaY ArRaY is offline
Class 2 Laser
 
Join Date: Jul 2008
Posts: 281
Rep Power: 12
ArRaY will become famous soon enoughArRaY will become famous soon enough
Default Re: Problems with DDL driver - current regulation

Du bist nicht im ernst auch Deutscher oder?

However, i still donŽt know where the difference is between placing the diode between adj and Vout, scince both are connected together....
ArRaY is offline   Reply With Quote
Old 07-18-2008, 09:17 PM #13
FireMyLaser's Avatar
Class 3B Laser
 
Join Date: Jan 2008
Location: Sweden
Posts: 3,052
Rep Power: 567
FireMyLaser has a reputation beyond reputeFireMyLaser has a reputation beyond reputeFireMyLaser has a reputation beyond reputeFireMyLaser has a reputation beyond reputeFireMyLaser has a reputation beyond reputeFireMyLaser has a reputation beyond reputeFireMyLaser has a reputation beyond reputeFireMyLaser has a reputation beyond reputeFireMyLaser has a reputation beyond reputeFireMyLaser has a reputation beyond reputeFireMyLaser has a reputation beyond repute
Send a message via MSN to FireMyLaser
FireMyLaser FireMyLaser is online now
Class 3B Laser
FireMyLaser's Avatar
 
Join Date: Jan 2008
Location: Sweden
Posts: 3,052
Rep Power: 567
FireMyLaser has a reputation beyond reputeFireMyLaser has a reputation beyond reputeFireMyLaser has a reputation beyond reputeFireMyLaser has a reputation beyond reputeFireMyLaser has a reputation beyond reputeFireMyLaser has a reputation beyond reputeFireMyLaser has a reputation beyond reputeFireMyLaser has a reputation beyond reputeFireMyLaser has a reputation beyond reputeFireMyLaser has a reputation beyond reputeFireMyLaser has a reputation beyond repute
Send a message via MSN to FireMyLaser
Default Re: Problems with DDL driver - current regulation

Was? Mein deutsch ist slecht.

They are not connected together (directly), there's the difference. :
__________________
Niko likes cereal.
FireMyLaser is online now   Reply With Quote
Old 07-18-2008, 09:20 PM #14
Class 2 Laser
 
Join Date: Jul 2008
Posts: 281
Rep Power: 12
ArRaY will become famous soon enoughArRaY will become famous soon enough
ArRaY ArRaY is offline
Class 2 Laser
 
Join Date: Jul 2008
Posts: 281
Rep Power: 12
ArRaY will become famous soon enoughArRaY will become famous soon enough
Default Re: Problems with DDL driver - current regulation

I asked you if you are a german, in german

Now it works, but ainŽt i connecting the diode between adj and gnd?
I always thought i had to connect it between out and gnd...
ArRaY is offline   Reply With Quote
Old 07-18-2008, 09:26 PM #15
FireMyLaser's Avatar
Class 3B Laser
 
Join Date: Jan 2008
Location: Sweden
Posts: 3,052
Rep Power: 567
FireMyLaser has a reputation beyond reputeFireMyLaser has a reputation beyond reputeFireMyLaser has a reputation beyond reputeFireMyLaser has a reputation beyond reputeFireMyLaser has a reputation beyond reputeFireMyLaser has a reputation beyond reputeFireMyLaser has a reputation beyond reputeFireMyLaser has a reputation beyond reputeFireMyLaser has a reputation beyond reputeFireMyLaser has a reputation beyond reputeFireMyLaser has a reputation beyond repute
Send a message via MSN to FireMyLaser
FireMyLaser FireMyLaser is online now
Class 3B Laser
FireMyLaser's Avatar
 
Join Date: Jan 2008
Location: Sweden
Posts: 3,052
Rep Power: 567
FireMyLaser has a reputation beyond reputeFireMyLaser has a reputation beyond reputeFireMyLaser has a reputation beyond reputeFireMyLaser has a reputation beyond reputeFireMyLaser has a reputation beyond reputeFireMyLaser has a reputation beyond reputeFireMyLaser has a reputation beyond reputeFireMyLaser has a reputation beyond reputeFireMyLaser has a reputation beyond reputeFireMyLaser has a reputation beyond reputeFireMyLaser has a reputation beyond repute
Send a message via MSN to FireMyLaser
Default Re: Problems with DDL driver - current regulation

"I asked you if you are a german, in german"
Obviously not! ;D Welcome to Sweden.


As strange as it sounds, yes, you'll connect the diode between adj and gnd with this circuit.
__________________
Niko likes cereal.
FireMyLaser is online now   Reply With Quote
Old 07-18-2008, 09:34 PM #16
Class 2 Laser
 
Join Date: Jul 2008
Posts: 281
Rep Power: 12
ArRaY will become famous soon enoughArRaY will become famous soon enough
ArRaY ArRaY is offline
Class 2 Laser
 
Join Date: Jul 2008
Posts: 281
Rep Power: 12
ArRaY will become famous soon enoughArRaY will become famous soon enough
Default Re: Problems with DDL driver - current regulation

At first i thought you fooled me, because you wrote english, just for saying your from my on country. ;D

Strange. In all these circuit diagrams, there was always the load connected between out and gnd.
Even in the datasheet. But no problem, thanks for pointing that out.

ArRaY
ArRaY is offline   Reply With Quote
Reply





Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On











Loading








Green Laser Pointers by Category Blue Laser Pointers by Category Red Laser Pointers by Category
Yellow Laser Pointers by Category Violet Laser Pointers by Category Orange Laser Pointers by Category
Top Laser Pointers by Power - 1 Watt+ Top Laser Pointers by Power - 500mW+ Top Laser Pointers by Power - 250mW+
Laser Pointer Database High Power Laser Pointers Laser Pointer Diodes






Privacy Policy | Advertising Disclaimer | Terms of Use


 


All times are GMT. The time now is 11:16 AM.


Powered by: vBulletin
Copyright ©2000 - 2017, Jelsoft Enterprises Ltd.
Search Engine Friendly URLs by vBSEO
Privacy Policy | Advertising Disclaimer | Terms of Use
Copyright (C) 2017 Laser Pointer Forums, LLC