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 05-28-2009, 07:24 AM #17
rog8811's Avatar
Class 3B Laser
 
Join Date: Jul 2007
Location: Berkshire UK
Posts: 2,749
Rep Power: 193
rog8811 has a reputation beyond reputerog8811 has a reputation beyond reputerog8811 has a reputation beyond reputerog8811 has a reputation beyond reputerog8811 has a reputation beyond reputerog8811 has a reputation beyond reputerog8811 has a reputation beyond reputerog8811 has a reputation beyond reputerog8811 has a reputation beyond reputerog8811 has a reputation beyond reputerog8811 has a reputation beyond repute
rog8811 rog8811 is offline
Class 3B Laser
rog8811's Avatar
 
Join Date: Jul 2007
Location: Berkshire UK
Posts: 2,749
Rep Power: 193
rog8811 has a reputation beyond reputerog8811 has a reputation beyond reputerog8811 has a reputation beyond reputerog8811 has a reputation beyond reputerog8811 has a reputation beyond reputerog8811 has a reputation beyond reputerog8811 has a reputation beyond reputerog8811 has a reputation beyond reputerog8811 has a reputation beyond reputerog8811 has a reputation beyond reputerog8811 has a reputation beyond repute
Default

Quote:
I'm using rog8811's driver on his site. Will that still be ok?
That is the LM317 circuit so 9v battery will be good

Regards rog8811


__________________
See all of my videos on Vimeo
http://www.vimeo.com/4454150

Lots of tutorials and information on lasers
http://www.rog8811.com/

In the land of the blind the one eyed man..... is most likely holding the laser
rog8811 is offline   Reply With Quote







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







Old 05-28-2009, 03:17 PM #18
bhank's Avatar
Class 1M Laser
 
Join Date: May 2009
Location: Bedford, Tx
Posts: 108
Rep Power: 9
bhank is on a distinguished road
Send a message via AIM to bhank
bhank bhank is offline
Class 1M Laser
bhank's Avatar
 
Join Date: May 2009
Location: Bedford, Tx
Posts: 108
Rep Power: 9
bhank is on a distinguished road
Send a message via AIM to bhank
Default

Well, I'm happy to say that with everyones help I finished building my first laser last night. It's a bit more powerfull than I was actually expecting and I'd heard people say how the beam of the blu-ray is kinda strange but now I know exactly what they mean haha. Thanks guys for all of your help and i plan on making many more lasers now that I know what I'm doing a little more lol.

Again, Thanks guys
bhank is offline   Reply With Quote
Old 06-02-2009, 04:07 AM #19
bhank's Avatar
Class 1M Laser
 
Join Date: May 2009
Location: Bedford, Tx
Posts: 108
Rep Power: 9
bhank is on a distinguished road
Send a message via AIM to bhank
bhank bhank is offline
Class 1M Laser
bhank's Avatar
 
Join Date: May 2009
Location: Bedford, Tx
Posts: 108
Rep Power: 9
bhank is on a distinguished road
Send a message via AIM to bhank
Default

All right so I've got another question. In my last laser project, i used a phr blu-ray diode and the driver that rog8811 has up on his site, but instead of a 100ohm potentiometer i used a 25 ohm potentiometer. I used the 25 ohm partially because i couldnt find out at a radioshack near me and I was told it would work, and i also put in a push button switch to turn it on and off. SO, when I turn it on its still fairly bright at the lowest setting. So what i was wondering was this, is there anyway to use only a potentiometer or something similar to both turn the power on and gradually ramp up the power? Also instead of starting it off at lets say half power, is there a way to start off the gradual ramping up from 0. I may not be clear haha but if anyone has a question please ask and anyone who can help, please do haha. thanks
bhank is offline   Reply With Quote
Old 06-02-2009, 04:35 AM #20
chipdouglas's Avatar
Class 3B Laser
 
Join Date: Dec 2008
Location: Riverside, California
Posts: 4,011
Rep Power: 347
chipdouglas has a reputation beyond reputechipdouglas has a reputation beyond reputechipdouglas has a reputation beyond reputechipdouglas has a reputation beyond reputechipdouglas has a reputation beyond reputechipdouglas has a reputation beyond reputechipdouglas has a reputation beyond reputechipdouglas has a reputation beyond reputechipdouglas has a reputation beyond reputechipdouglas has a reputation beyond reputechipdouglas has a reputation beyond repute
Send a message via Yahoo to chipdouglas
chipdouglas chipdouglas is offline
Class 3B Laser
chipdouglas's Avatar
 
Join Date: Dec 2008
Location: Riverside, California
Posts: 4,011
Rep Power: 347
chipdouglas has a reputation beyond reputechipdouglas has a reputation beyond reputechipdouglas has a reputation beyond reputechipdouglas has a reputation beyond reputechipdouglas has a reputation beyond reputechipdouglas has a reputation beyond reputechipdouglas has a reputation beyond reputechipdouglas has a reputation beyond reputechipdouglas has a reputation beyond reputechipdouglas has a reputation beyond reputechipdouglas has a reputation beyond repute
Send a message via Yahoo to chipdouglas
Default

a regular 9v alkaline will not be the best choice. they don't have the mah high enought to run the diode long enough. I use lithium ion rechargeables. if you were to go back and read old post (though i'll save you time by telling you) a lot of peeps ran into problems about not lasing or not being able to set the driver. it always came back to the 9v alkalines.
__________________
IN A CONSTANT STATE OF PICNIC

I AM THE STATUS QUO

ARE YOU A NEW MEMBER, OR EVEN MORE, ARE YOU NEW TO ONLINE FORUMS... READ THIS
LASER POINTER FORUM ETIQUETTE


for pot modding facts click below

http://laserpointerforums.com/f51/pot-modding-faqs-40510.html
chipdouglas is offline   Reply With Quote
Old 06-02-2009, 04:40 AM #21
pseudolobster's Avatar
Class 3R Laser
 
Join Date: Jan 2008
Location: BC, Canada
Posts: 1,734
Rep Power: 153
pseudolobster has a reputation beyond reputepseudolobster has a reputation beyond reputepseudolobster has a reputation beyond reputepseudolobster has a reputation beyond reputepseudolobster has a reputation beyond reputepseudolobster has a reputation beyond reputepseudolobster has a reputation beyond reputepseudolobster has a reputation beyond reputepseudolobster has a reputation beyond reputepseudolobster has a reputation beyond reputepseudolobster has a reputation beyond repute
pseudolobster pseudolobster is offline
Class 3R Laser
pseudolobster's Avatar
 
Join Date: Jan 2008
Location: BC, Canada
Posts: 1,734
Rep Power: 153
pseudolobster has a reputation beyond reputepseudolobster has a reputation beyond reputepseudolobster has a reputation beyond reputepseudolobster has a reputation beyond reputepseudolobster has a reputation beyond reputepseudolobster has a reputation beyond reputepseudolobster has a reputation beyond reputepseudolobster has a reputation beyond reputepseudolobster has a reputation beyond reputepseudolobster has a reputation beyond reputepseudolobster has a reputation beyond repute
Default

Build a "dummy load", it's basically just 6 regular diodes in series to simulate the voltage drop of the laser diode, then a 1ohm resistor in series, across which you can measure the voltage to figure out the amperage the diode is getting.

So basically, wire 6 diodes end to end, then add a 1ohm resistor in there, hook these up to your driver, and you can adjust the pot without fear of destroying your laser... measure the amperage using the voltage setting on your multimeter, measure across the resistor. According to Ohm's law, at 1ohm, 1mV = 1mA.

Set your PHR driver to between 95mA and 120mA for a reasonable lifespan. You can't simply look at the brightness and determine if it's a safe level for your laser to be operating at.
__________________
Custom Text
pseudolobster is offline   Reply With Quote
Old 06-02-2009, 04:52 AM #22
bhank's Avatar
Class 1M Laser
 
Join Date: May 2009
Location: Bedford, Tx
Posts: 108
Rep Power: 9
bhank is on a distinguished road
Send a message via AIM to bhank
bhank bhank is offline
Class 1M Laser
bhank's Avatar
 
Join Date: May 2009
Location: Bedford, Tx
Posts: 108
Rep Power: 9
bhank is on a distinguished road
Send a message via AIM to bhank
Default

I understand that i cant just look at it to determine what kind of power its pushing. the pot im using though is set on the case i set the laser in so that i can control power during operation. is that ok? and what i mean is, is there a way to make it so that the highest resistance on the pot will just turn the laser off completely? then still get up to about 125mA?
bhank is offline   Reply With Quote
Old 06-02-2009, 04:57 AM #23
chipdouglas's Avatar
Class 3B Laser
 
Join Date: Dec 2008
Location: Riverside, California
Posts: 4,011
Rep Power: 347
chipdouglas has a reputation beyond reputechipdouglas has a reputation beyond reputechipdouglas has a reputation beyond reputechipdouglas has a reputation beyond reputechipdouglas has a reputation beyond reputechipdouglas has a reputation beyond reputechipdouglas has a reputation beyond reputechipdouglas has a reputation beyond reputechipdouglas has a reputation beyond reputechipdouglas has a reputation beyond reputechipdouglas has a reputation beyond repute
Send a message via Yahoo to chipdouglas
chipdouglas chipdouglas is offline
Class 3B Laser
chipdouglas's Avatar
 
Join Date: Dec 2008
Location: Riverside, California
Posts: 4,011
Rep Power: 347
chipdouglas has a reputation beyond reputechipdouglas has a reputation beyond reputechipdouglas has a reputation beyond reputechipdouglas has a reputation beyond reputechipdouglas has a reputation beyond reputechipdouglas has a reputation beyond reputechipdouglas has a reputation beyond reputechipdouglas has a reputation beyond reputechipdouglas has a reputation beyond reputechipdouglas has a reputation beyond reputechipdouglas has a reputation beyond repute
Send a message via Yahoo to chipdouglas
Default

you can do that. I don't know how. but i can explain it. on your driver if you use the correct resistor combo to, lets say there is no pot, use the resistors to set the max current you want. then you throw in a pot then you can adjust it all day long and not worry about going over the max current of the LD because the resistors are there.
__________________
IN A CONSTANT STATE OF PICNIC

I AM THE STATUS QUO

ARE YOU A NEW MEMBER, OR EVEN MORE, ARE YOU NEW TO ONLINE FORUMS... READ THIS
LASER POINTER FORUM ETIQUETTE


for pot modding facts click below

http://laserpointerforums.com/f51/pot-modding-faqs-40510.html
chipdouglas is offline   Reply With Quote
Old 06-02-2009, 05:06 AM #24
bhank's Avatar
Class 1M Laser
 
Join Date: May 2009
Location: Bedford, Tx
Posts: 108
Rep Power: 9
bhank is on a distinguished road
Send a message via AIM to bhank
bhank bhank is offline
Class 1M Laser
bhank's Avatar
 
Join Date: May 2009
Location: Bedford, Tx
Posts: 108
Rep Power: 9
bhank is on a distinguished road
Send a message via AIM to bhank
Default

Right and that is what i have been doing. but what i want to do is use just the pot to turn the laser on, then, starting from no power, ramp it up to full power. now like i said i have been doing just what you said Chip, but just turning on the laser with the pushbutton switch im using will put it to a higher power than 0 obviously, even if the pot is at its lowest setting. i guess what im wondering is if there is something that is a power switch AND a pot in one... i want to control the power from absolutely 0 or OFF all the way up to full power, wheather that is 125mA or anything else. I just want to control the power from off gradually up to full power.
bhank is offline   Reply With Quote
Old 06-02-2009, 05:16 PM #25
rog8811's Avatar
Class 3B Laser
 
Join Date: Jul 2007
Location: Berkshire UK
Posts: 2,749
Rep Power: 193
rog8811 has a reputation beyond reputerog8811 has a reputation beyond reputerog8811 has a reputation beyond reputerog8811 has a reputation beyond reputerog8811 has a reputation beyond reputerog8811 has a reputation beyond reputerog8811 has a reputation beyond reputerog8811 has a reputation beyond reputerog8811 has a reputation beyond reputerog8811 has a reputation beyond reputerog8811 has a reputation beyond repute
rog8811 rog8811 is offline
Class 3B Laser
rog8811's Avatar
 
Join Date: Jul 2007
Location: Berkshire UK
Posts: 2,749
Rep Power: 193
rog8811 has a reputation beyond reputerog8811 has a reputation beyond reputerog8811 has a reputation beyond reputerog8811 has a reputation beyond reputerog8811 has a reputation beyond reputerog8811 has a reputation beyond reputerog8811 has a reputation beyond reputerog8811 has a reputation beyond reputerog8811 has a reputation beyond reputerog8811 has a reputation beyond reputerog8811 has a reputation beyond repute
Default

You would probably find that a 100ohm pot would do that as at max resistance it would only allow 12.5ma through.... A 1k pot would turn it right off but all the adjustment would be in the last few degrees of turn so not easily controlable.
What ever you use you will still need a switch as the circuit will draw current how ever high the resistance.

Regards rog8811
__________________
See all of my videos on Vimeo
http://www.vimeo.com/4454150

Lots of tutorials and information on lasers
http://www.rog8811.com/

In the land of the blind the one eyed man..... is most likely holding the laser
rog8811 is offline   Reply With Quote
Old 06-04-2009, 03:28 AM #26
bhank's Avatar
Class 1M Laser
 
Join Date: May 2009
Location: Bedford, Tx
Posts: 108
Rep Power: 9
bhank is on a distinguished road
Send a message via AIM to bhank
bhank bhank is offline
Class 1M Laser
bhank's Avatar
 
Join Date: May 2009
Location: Bedford, Tx
Posts: 108
Rep Power: 9
bhank is on a distinguished road
Send a message via AIM to bhank
Default

Oh ok. That is exactly what I was thinking lol. Thank you Rog
bhank is offline   Reply With Quote
Old 06-07-2009, 10:18 AM #27
Tw15t3r's Avatar
Class 2 Laser
 
Join Date: Oct 2008
Location: Singapore
Posts: 266
Rep Power: 18
Tw15t3r is a splendid one to beholdTw15t3r is a splendid one to beholdTw15t3r is a splendid one to beholdTw15t3r is a splendid one to beholdTw15t3r is a splendid one to beholdTw15t3r is a splendid one to beholdTw15t3r is a splendid one to behold
Tw15t3r Tw15t3r is offline
Class 2 Laser
Tw15t3r's Avatar
 
Join Date: Oct 2008
Location: Singapore
Posts: 266
Rep Power: 18
Tw15t3r is a splendid one to beholdTw15t3r is a splendid one to beholdTw15t3r is a splendid one to beholdTw15t3r is a splendid one to beholdTw15t3r is a splendid one to beholdTw15t3r is a splendid one to beholdTw15t3r is a splendid one to behold
Default

There are some potentiometers that have a built in switch, so after you reach the highest resistance that it can offer, a slight turn further would click, and break the circuit (i.e. switch off). Volume controls on pocket radios usually work this way. You turn to lowest volume, and a further nudge clicks it off.

I'm not sure what it's called though, but such things do exist.
Tw15t3r is offline   Reply With Quote
Old 06-07-2009, 11:44 AM #28
rog8811's Avatar
Class 3B Laser
 
Join Date: Jul 2007
Location: Berkshire UK
Posts: 2,749
Rep Power: 193
rog8811 has a reputation beyond reputerog8811 has a reputation beyond reputerog8811 has a reputation beyond reputerog8811 has a reputation beyond reputerog8811 has a reputation beyond reputerog8811 has a reputation beyond reputerog8811 has a reputation beyond reputerog8811 has a reputation beyond reputerog8811 has a reputation beyond reputerog8811 has a reputation beyond reputerog8811 has a reputation beyond repute
rog8811 rog8811 is offline
Class 3B Laser
rog8811's Avatar
 
Join Date: Jul 2007
Location: Berkshire UK
Posts: 2,749
Rep Power: 193
rog8811 has a reputation beyond reputerog8811 has a reputation beyond reputerog8811 has a reputation beyond reputerog8811 has a reputation beyond reputerog8811 has a reputation beyond reputerog8811 has a reputation beyond reputerog8811 has a reputation beyond reputerog8811 has a reputation beyond reputerog8811 has a reputation beyond reputerog8811 has a reputation beyond reputerog8811 has a reputation beyond repute
Default

Quote:
There are some potentiometers that have a built in switch
They do exist but tend to be quite large so it depends on what build is being undertaken.

Regards rog8811
__________________
See all of my videos on Vimeo
http://www.vimeo.com/4454150

Lots of tutorials and information on lasers
http://www.rog8811.com/

In the land of the blind the one eyed man..... is most likely holding the laser
rog8811 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 05:30 PM.


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