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 > Experiments & Modifications



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



Closed Thread
 
LinkBack Thread Tools Display Modes
Old 09-23-2007, 11:10 AM #337
Class 1M Laser
 
Join Date: Aug 2007
Posts: 199
Rep Power: 11
xgeek is on a distinguished road
xgeek xgeek is offline
Class 1M Laser
 
Join Date: Aug 2007
Posts: 199
Rep Power: 11
xgeek is on a distinguished road
Default Re: DIY Homemade laser diode driver

You don't seem to have the diodes listed in your cart so you will need to add them. Also not sure why you need the 100k trimmer or the 10k resistors. They have far too high a resistance to be of use.

Cheers

XG


xgeek is offline  







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







Old 09-23-2007, 11:15 AM #338
Junior Member
 
Join Date: Aug 2007
Posts: 25
Rep Power: 0
-Witch-Doct0r- is a splendid one to behold-Witch-Doct0r- is a splendid one to behold-Witch-Doct0r- is a splendid one to behold-Witch-Doct0r- is a splendid one to behold-Witch-Doct0r- is a splendid one to behold-Witch-Doct0r- is a splendid one to behold-Witch-Doct0r- is a splendid one to behold
-Witch-Doct0r- -Witch-Doct0r- is offline
Junior Member
 
Join Date: Aug 2007
Posts: 25
Rep Power: 0
-Witch-Doct0r- is a splendid one to behold-Witch-Doct0r- is a splendid one to behold-Witch-Doct0r- is a splendid one to behold-Witch-Doct0r- is a splendid one to behold-Witch-Doct0r- is a splendid one to behold-Witch-Doct0r- is a splendid one to behold-Witch-Doct0r- is a splendid one to behold
Default Re: DIY Homemade laser diode driver

You have got 2 capacitors there you will only need the radial-lead cap item number: 2102512
-Witch-Doct0r- is offline  
Old 09-23-2007, 12:07 PM #339
High_Octane
Guest
 
Posts: n/a
High_Octane
Guest
 
Posts: n/a
Default Re: DIY Homemade laser diode driver

Thanks guys, I have updated it, Hopefully its correct now :-[
Attached Thumbnails
DIY Homemade laser diode driver-wishlist_2.jpg  
 
Old 09-23-2007, 12:24 PM #340
Class 1M Laser
 
Join Date: Aug 2007
Posts: 199
Rep Power: 11
xgeek is on a distinguished road
xgeek xgeek is offline
Class 1M Laser
 
Join Date: Aug 2007
Posts: 199
Rep Power: 11
xgeek is on a distinguished road
Default Re: DIY Homemade laser diode driver

Okay that's better.

Now the 1000 ohm 15 turn pot is a bit high. As you have the 25 ohm rheostat I would ditch the 15 turn pot.

If the pot is linear that works out at 66.66 ohms per turn. Anything over 15 ohms (a qtr turn of a 15 turn pot) between the adj and vout pins on the LM317 will not have enough current to drive the LD.

xgeek is offline  
Old 09-23-2007, 12:33 PM #341
High_Octane
Guest
 
Posts: n/a
High_Octane
Guest
 
Posts: n/a
Default Re: DIY Homemade laser diode driver

Quote:
Originally Posted by xgeek
Okay that's better.

Now the 1000 ohm 15 turn pot is a bit high. As you have the 25 ohm rheostat I would ditch the 15 turn pot.

If the pot is linear that works out at 66.66 ohms per turn. Anything over 15 ohms (a qtr turn of a 15 turn pot) between the adj and vout pins on the LM317 will not have enough current to drive the LD.
OK thank you, the 1000 ohm 15 turn pot is the lowest resistance RatShack has, guess I'll have to purchase the pot from elsewhere.
 
Old 09-23-2007, 12:40 PM #342
Class 1M Laser
 
Join Date: Aug 2007
Posts: 199
Rep Power: 11
xgeek is on a distinguished road
xgeek xgeek is offline
Class 1M Laser
 
Join Date: Aug 2007
Posts: 199
Rep Power: 11
xgeek is on a distinguished road
Default Re: DIY Homemade laser diode driver

But why the need for the extra pot when you have the 25 ohm rheostat :-?
xgeek is offline  
Old 09-23-2007, 12:54 PM #343
High_Octane
Guest
 
Posts: n/a
High_Octane
Guest
 
Posts: n/a
Default Re: DIY Homemade laser diode driver

Quote:
Originally Posted by xgeek
But why the need for the extra pot when you have the 25 ohm rheostat :-?
Uhhh... cuz i'm a tard before my coffee kicks in. :

Thanks for the guidance , Now to purchase them.
 
Old 09-23-2007, 07:43 PM #344
Class 2 Laser
 
Join Date: Sep 2007
Posts: 415
Rep Power: 11
philguy is on a distinguished road
philguy philguy is offline
Class 2 Laser
 
Join Date: Sep 2007
Posts: 415
Rep Power: 11
philguy is on a distinguished road
Default Re: DIY Homemade laser diode driver

I appear to be blind (no worries, don't have my lasers yet), but I just can't find the layout for the driver you can buy from senkat.
Is the circuit layout only available if I buy it from him, or is it just hidden somewhere (or am I just ˙nable to look properly)?
philguy is offline  
Old 09-23-2007, 08:22 PM #345
High_Octane
Guest
 
Posts: n/a
High_Octane
Guest
 
Posts: n/a
Default Re: DIY Homemade laser diode driver

Quote:
Originally Posted by philguy
I appear to be blind (no worries, don't have my lasers yet), but I just can't find the layout for the driver you can buy from senkat.
Is the circuit layout only available if I buy it from him, or is it just hidden somewhere (or am I just ˙nable to look properly)?
Heres one, I not sure who's anymore.
Attached Thumbnails
DIY Homemade laser diode driver-ld_driver_schematic_002.jpg  
 
Old 09-23-2007, 08:33 PM #346
Class 2 Laser
 
Join Date: Aug 2007
Posts: 280
Rep Power: 11
Skram0 is on a distinguished road
Skram0 Skram0 is offline
Class 2 Laser
 
Join Date: Aug 2007
Posts: 280
Rep Power: 11
Skram0 is on a distinguished road
Default Re: DIY Homemade laser diode driver

I've used that exact 1K pot in my driver and it works okay. It's just a waste of about 14 turns which makes fine adjustments a little difficult, but it's not bad for the size. It'll do the job as any other pot would.
Skram0 is offline  
Old 09-23-2007, 09:17 PM #347
High_Octane
Guest
 
Posts: n/a
High_Octane
Guest
 
Posts: n/a
Default Re: DIY Homemade laser diode driver

Thanks, I'll keep that in mind while I build my first 3, I'm sure I'll need and want to make a few changes.
 
Old 09-23-2007, 09:29 PM #348
Class 1 Laser
 
Join Date: Sep 2007
Posts: 51
Rep Power: 15
morganclay1219 is a glorious beacon of lightmorganclay1219 is a glorious beacon of lightmorganclay1219 is a glorious beacon of lightmorganclay1219 is a glorious beacon of lightmorganclay1219 is a glorious beacon of lightmorganclay1219 is a glorious beacon of light
morganclay1219 morganclay1219 is offline
Class 1 Laser
 
Join Date: Sep 2007
Posts: 51
Rep Power: 15
morganclay1219 is a glorious beacon of lightmorganclay1219 is a glorious beacon of lightmorganclay1219 is a glorious beacon of lightmorganclay1219 is a glorious beacon of lightmorganclay1219 is a glorious beacon of lightmorganclay1219 is a glorious beacon of light
Default Re: DIY Homemade laser diode driver

If you think about it, though, the 15 turn 1K ohm pot would be more precise to adjust than the 1 turn 100 ohm pot: 1000/15=66.7 ohms/turn as opposed to 100 ohms/turn with the other. You just turn it to within 1 turn of 0 ohms then adjust it from there. The only difference would be that if there's, say, a 5% accuracy tolerence, the 100 ohm pot could only be off by 5 ohms where the 1000 ohm pot could be off by 50. So both types have their pros and cons - it may or may not be worth it to special order the 100 ohm pot if you can't get it from Radio Shack.
morganclay1219 is offline  
Old 09-23-2007, 09:34 PM #349
Gazoo's Avatar
Class 3B Laser
 
Join Date: Jun 2007
Location: Dallas Tx
Posts: 3,199
Rep Power: 180
Gazoo has a reputation beyond reputeGazoo has a reputation beyond reputeGazoo has a reputation beyond reputeGazoo has a reputation beyond reputeGazoo has a reputation beyond reputeGazoo has a reputation beyond reputeGazoo has a reputation beyond reputeGazoo has a reputation beyond reputeGazoo has a reputation beyond reputeGazoo has a reputation beyond reputeGazoo has a reputation beyond repute
Gazoo Gazoo is offline
Class 3B Laser
Gazoo's Avatar
 
Join Date: Jun 2007
Location: Dallas Tx
Posts: 3,199
Rep Power: 180
Gazoo has a reputation beyond reputeGazoo has a reputation beyond reputeGazoo has a reputation beyond reputeGazoo has a reputation beyond reputeGazoo has a reputation beyond reputeGazoo has a reputation beyond reputeGazoo has a reputation beyond reputeGazoo has a reputation beyond reputeGazoo has a reputation beyond reputeGazoo has a reputation beyond reputeGazoo has a reputation beyond repute
Default Re: DIY Homemade laser diode driver

The resistance of the pot might be linear, but the amount of current going to the diode will not be linear. In other words, when you start to get in the area of the least resistance, the current begins to jump up...I hope that makes sense.. :P
Gazoo is offline  
Old 09-23-2007, 09:51 PM #350
High_Octane
Guest
 
Posts: n/a
High_Octane
Guest
 
Posts: n/a
Default Re: DIY Homemade laser diode driver

I have an assortment of pots, from large to small, I just have to check to see what the resistance of each one is.
 
Old 09-23-2007, 11:49 PM #351
Member
 
Join Date: Sep 2007
Posts: 39
Rep Power: 0
dilmah is on a distinguished road
dilmah dilmah is offline
Member
 
Join Date: Sep 2007
Posts: 39
Rep Power: 0
dilmah is on a distinguished road
Default Re: DIY Homemade laser diode driver

Hey ive just got a few quick questions

1) Im a little confused at where to place the DMM in the circuit to measure voltage and current. Can we just attach the terminals of the DMM to the wires that would be going to the laser diode to measure the voltage going to the diode before we attach it? and where would you place it to measure the current?

2) I was wondering... we are aiming to get 2.5-3 V to the LD and 250 mA. but if you plug that into P = VI you would get about 750 mW? isnt that a bit much, or am i calculating wrong?

3) I think my circuit is not correctly wired (or im not measuring at the right spots) - when i measure the voltage, it starts at about 2.5 and keeps going down and down and down (even if i unplug and reconnect the terminals of the DMM). but if i measure it again a few minutes later, it goes back to about 2.5 v and keeps going down and down.. if thats just a crazy result, dont worry about it, im going to make another circuit and test it out - any answers to the above two questions would be enough

thanks a lot for your help guys

dil
dilmah is offline  
Old 09-24-2007, 12:03 AM #352
Junior Member
 
Join Date: Aug 2007
Posts: 8
Rep Power: 0
microtronix is on a distinguished road
microtronix microtronix is offline
Junior Member
 
Join Date: Aug 2007
Posts: 8
Rep Power: 0
microtronix is on a distinguished road
Default Re: DIY Homemade laser diode driver

If I put the capacitor in parallel with the battery before it goes into the lm317 would that still be effective and do an ok job of filtering any spikes?
microtronix is offline  
Closed Thread





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


LinkBacks (?)
LinkBack to this Thread: http://laserpointerforums.com/f42/diy-homemade-laser-diode-driver-26339.html
Posted By For Type Date
Laser 530: The diode laser This thread Refback 07-03-2017 05:17 AM
Laser Driver Diy images This thread Refback 06-14-2017 03:42 AM
Laser 530: The diode laser This thread Refback 06-12-2017 09:27 PM
Proiect:Laser de 100-200mW - LED-uri si alte surse de lumina - Forumul Electronistilor This thread Refback 05-15-2017 06:33 PM
Laser 530: October 2010 This thread Refback 03-31-2017 09:12 AM
Laser 530: The diode laser This thread Refback 03-06-2017 01:40 PM
Laser 530: October 2010 This thread Refback 02-25-2017 01:34 PM
zero fidelity CNC: Laser diode driver circuit This thread Refback 02-09-2017 02:09 PM
Laser 530: The diode laser This thread Refback 11-06-2016 06:52 PM
Laser Diode Wiring Diagram - rs232 laser transceiver This thread Refback 10-25-2016 01:37 PM
Laser 530: October 2010 This thread Refback 08-14-2016 01:59 PM
Laser 530: The diode laser This thread Refback 07-14-2016 03:51 PM
Laser 530: October 2010 This thread Refback 07-06-2016 12:59 PM
Laser 530: The diode laser This thread Refback 04-18-2016 02:17 PM
Download DIY Make A 3 Laser Diode Driver Video Mp4 3gp This thread Refback 02-16-2016 08:13 AM
Laser V | Page 2 | OpenBuilds This thread Refback 02-10-2016 12:16 PM
?????-???????? : 300mW Mini This thread Refback 02-07-2016 08:42 PM
Laser 530: The diode laser This thread Refback 12-14-2015 11:57 AM
Laser 530: The diode laser This thread Refback 12-11-2015 01:24 PM
Proiect de week-end: Masina de gravare cu laser din piese ?reciclate? | Blogul lui Iusty This thread Refback 11-22-2015 07:12 PM
zero fidelity CNC: Laser diode driver circuit This thread Refback 11-18-2015 03:42 PM
Diy Burning Laser : CRAFTS This thread Refback 10-19-2015 02:23 AM
Laser 530: October 2010 This thread Refback 10-08-2015 06:20 PM
Diy Homemade Laser Diode Driver 2015 | 123 Sayings This thread Refback 10-08-2015 04:00 AM
Simple Laser Diode Driver Circuit images This thread Refback 09-21-2015 04:31 PM
Laser 530: The diode laser This thread Refback 09-01-2015 05:23 AM
Le moteur de recherche franšais sans publicitÚ This thread Refback 07-13-2015 05:29 AM
laser diode driver circuit lm358 This thread Refback 07-10-2015 10:24 PM
Pin Diy Laser Diode Driver on Pinterest This thread Refback 06-17-2015 11:56 PM
445nm 1W (1000mW) Blue Brand New Laser Diode in Aixiz Module, HighTechDealZ This thread Refback 06-13-2015 03:24 PM
650nm LPC826 Brand New Laser Diode, HighTechDealZ This thread Refback 06-13-2015 12:00 PM
650nm LPC826 Red Laser Diode in Aixiz Module, HighTechDealZ This thread Refback 06-12-2015 02:06 AM
445nm 1W (1000mW) Blue Brand New Laser Diode, HighTechDealZ This thread Refback 06-11-2015 09:59 PM
DIY: Make a $3 Laser Diode Driver! Musica Movil | MusicaMoviles.com This thread Refback 06-10-2015 12:19 PM
Beginning laser projector build and first post, all advice appreciated This thread Refback 05-07-2015 04:57 PM
laser diode driver circuit schematic This thread Refback 04-25-2015 10:00 PM
Laser 530: The diode laser This thread Refback 03-23-2015 06:12 PM
> circuits > diy homemade laser diode driver l29268 - Next.gr This thread Refback 03-21-2015 06:55 PM
Laser 530: October 2010 This thread Refback 03-16-2015 01:38 PM
> circuits > police laser lidar jammers l34798 - Next.gr This thread Refback 02-16-2015 10:38 AM
Laser 530: October 2010 This thread Refback 02-01-2015 03:34 PM
Laser 530: October 2010 This thread Refback 01-31-2015 03:15 PM
Make Laser Diode Driver This thread Refback 01-12-2015 08:33 AM
Laser 530: October 2010 This thread Refback 01-06-2015 09:39 AM
Laser 530: The diode laser This thread Refback 12-26-2014 07:44 PM
Laser cutter, start slicing stuff for under 50 dollars This thread Refback 12-26-2014 10:42 AM
Magmod Coupon Code 2014 | Mine Craft Online Resource This thread Refback 11-15-2014 10:34 PM
Laser 530: October 2010 This thread Refback 11-11-2014 06:08 PM
Laser 530: The diode laser This thread Refback 10-31-2014 02:34 PM
DIY Homemade Laser Diode Driver Laser Pointers - Searchable.openedhost.com This thread Refback 10-28-2014 01:12 PM










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 10:02 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