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)



Reply
 
LinkBack Thread Tools Display Modes
Old 11-04-2007, 11:04 PM #17
Class 1M Laser
 
Join Date: Sep 2007
Posts: 209
Rep Power: 10
Greyfox is on a distinguished road
Greyfox Greyfox is offline
Class 1M Laser
 
Join Date: Sep 2007
Posts: 209
Rep Power: 10
Greyfox is on a distinguished road
Default Re: Did I screw my driver??

This is the LM317 sold by RadioShack and all docs given with them.
Attached Thumbnails
Did I screw my driver??-rs2761778.jpg  


Greyfox is offline   Reply With Quote







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







Old 11-04-2007, 11:54 PM #18
Benm's Avatar
Class 4 Laser
 
Join Date: Aug 2007
Location: Netherlands
Posts: 7,428
Rep Power: 15904
Benm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond repute
Benm Benm is online now
Class 4 Laser
Benm's Avatar
 
Join Date: Aug 2007
Location: Netherlands
Posts: 7,428
Rep Power: 15904
Benm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond repute
Default Re: Did I screw my driver??

$2.29.. thats a major rip off Oh well, you get a retail package round it.

Don't use ordinary 5mm leds as dummy loads.. as pointed out before, you'll blow them long before reaching regulation. Get something like a 1 watt luxeon star led if you want to use a led for a dummy.
Benm is online now   Reply With Quote
Old 11-05-2007, 12:07 AM #19
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: Did I screw my driver??

Grey Fox,
Thank you so much for posting the picture. Since amkdeath claimed on his Radio Shack package the middle pin was the adjust, it had me confused as to why the Radio Shack 317 would not be following the standard. Thanks to you there is no more confusion. The labeling of the pins on the RS 317 conforms to every single spec sheet I have seen. Thanks again

The following is from National Semiconductor's spec sheet:



Attached Thumbnails
Did I screw my driver??-317.jpg  
Gazoo is offline   Reply With Quote
Old 11-05-2007, 01:07 AM #20
amkdeath's Avatar
Class 3B Laser
 
Join Date: Oct 2007
Posts: 2,631
Rep Power: 143
amkdeath has a reputation beyond reputeamkdeath has a reputation beyond reputeamkdeath has a reputation beyond reputeamkdeath has a reputation beyond reputeamkdeath has a reputation beyond reputeamkdeath has a reputation beyond reputeamkdeath has a reputation beyond reputeamkdeath has a reputation beyond reputeamkdeath has a reputation beyond reputeamkdeath has a reputation beyond reputeamkdeath has a reputation beyond repute
amkdeath amkdeath is offline
Class 3B Laser
amkdeath's Avatar
 
Join Date: Oct 2007
Posts: 2,631
Rep Power: 143
amkdeath has a reputation beyond reputeamkdeath has a reputation beyond reputeamkdeath has a reputation beyond reputeamkdeath has a reputation beyond reputeamkdeath has a reputation beyond reputeamkdeath has a reputation beyond reputeamkdeath has a reputation beyond reputeamkdeath has a reputation beyond reputeamkdeath has a reputation beyond reputeamkdeath has a reputation beyond reputeamkdeath has a reputation beyond repute
Default Re: Did I screw my driver??

Quote:
Originally Posted by Gazoo
Grey Fox,
Thank you so much for posting the picture. Since amkdeath claimed on his Radio Shack package the middle pin was the adjust, it had me confused as to why the Radio Shack 317 would not be following the standard. Thanks to you there is no more confusion. The labeling of the pins on the RS 317 conforms to every single spec sheet I have seen. Thanks again

The following is from National Semiconductor's spec sheet:


hmm, I donno if you are saying I lied, or I am mistaken, although both statements would be incorrect.
I am looking at my regulator now, and it says pin 2 is ADJ
AND!!!
NOTE NOTE NOTE
!!!
My regulator looks different from that... the heatsink thing is a perfect square, not chopped off corners, also my regulator is bigger.
here is the pic from the radio shack website where I got mine:


I have 1 big LED that doesnt burn out when I attach it, and multiple regular ones that sizzle and fry when attached to driver. Should I attach the big one + 2 little ones? and one more thing:
Can I hook up my diode right now? will the driver work? will I mess up my LD?

Thanks for all your help

amk
__________________
My Webpage:
http://www.AmirRK.com
amkdeath is offline   Reply With Quote
Old 11-05-2007, 01:09 AM #21
Class 1M Laser
 
Join Date: Sep 2007
Posts: 209
Rep Power: 10
Greyfox is on a distinguished road
Greyfox Greyfox is offline
Class 1M Laser
 
Join Date: Sep 2007
Posts: 209
Rep Power: 10
Greyfox is on a distinguished road
Default Re: Did I screw my driver??

Quote:
Originally Posted by Gazoo
Grey Fox,
Thank you so much for posting the picture. Since amkdeath claimed on his Radio Shack package the middle pin was the adjust, it had me confused as to why the Radio Shack 317 would not be following the standard. Thanks to you there is no more confusion. The labeling of the pins on the RS 317 conforms to every single spec sheet I have seen. Thanks again
No problem. RadioShack doesn't make their own chips, thankfully. They buy bulk and sell high. Things may be overpriced, but at least they have them when you need to get something together on short notice.
Greyfox is offline   Reply With Quote
Old 11-05-2007, 01:23 AM #22
Class 1M Laser
 
Join Date: Sep 2007
Posts: 209
Rep Power: 10
Greyfox is on a distinguished road
Greyfox Greyfox is offline
Class 1M Laser
 
Join Date: Sep 2007
Posts: 209
Rep Power: 10
Greyfox is on a distinguished road
Default Re: Did I screw my driver??

Quote:
Originally Posted by amkdeath
hmm, I donno if you are saying I lied, or I am mistaken, although both statements would be incorrect.
I am looking at my regulator now, and it says pin 2 is ADJ
AND!!!
NOTE NOTE NOTE
!!!
My regulator looks different from that... the heatsink thing is a perfect square, not chopped off corners, also my regulator is bigger.
The pic you provided looks like the back of the 317s we all have. The clipped corners don't matter. It's the same package type, and some batches may have minor cosmetic differences. If you look at the reference schematic on the back of the package, it does look like pin 2 is adjust. This is not correct, and it does not mark the numbers for the pins. It's easy to become confused from that picture alone. Please also keep in mind that the schematic on the package is for a voltage regulator. To regulate current, you should use the schematic posted here by Daedal or any of the other variants for it.

That said, the pinout for the chip is marked on the package as well. If you received an open/torn/damaged package, this additional information may have been missing.

Quote:
Originally Posted by amkdeath
I have 1 big LED that doesnt burn out when I attach it, and multiple regular ones that sizzle and fry when attached to driver. Should I attach the big one + 2 little ones? and one more thing:
Can I hook up my diode right now? will the driver work? will I mess up my LD?

Thanks for all your help

amk
Simple answer, No. Don't hook up your diode yet. If you received faulty information on the chip pinout, it could seriously affect the regulator's operation.

As far as the physical size of an LED, it doesn't make much difference in the current draw. The smaller ones may have burned out faster because they operate with the same current on a lower voltage. Either way, it's a side point. A single, standard LED does not have enough current draw to allow this chip to function properly in the suggested current regulator circuit. If you must use an LED as a load, you need something more suitable. A 1W Luxeon was mentioned. These and similar can be found in many flashlights, and they are sold as 1W LED flashlights. A 1W LED exhibits (usually) similar characteristics to one of the group buy laser diodes and also many 16X DVD burner laser diodes. It makes a good test load for your supply. If you can't find one, you can use your current LED side by side with a 20 ohm 5W wirewound resistor. RadioShack sells these.
Greyfox is offline   Reply With Quote
Old 11-05-2007, 01:28 AM #23
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: Did I screw my driver??

Quote:
Originally Posted by amkdeath
[quote author=Gazoo link=1193786909/15#18 date=1194224837]
hmm, I donno if you are saying I lied, or I am mistaken, although both statements would be incorrect.
I am looking at my regulator now, and it says pin 2 is ADJ
AND!!!
NOTE NOTE NOTE
!!!
My regulator looks different from that... the heatsink thing is a perfect square, not chopped off corners, also my regulator is bigger.

amk
Amk,
I wasn't accusing you of lying or being mistaken. What you have is either strange, or the package was mislabeled. I am more curious than anything else.

Can you post the exact numbers on the 317, if there are any? And BTW, the shape of the heatsink has nothing to do with identifying what you have.
Gazoo is offline   Reply With Quote
Old 11-05-2007, 01:48 AM #24
amkdeath's Avatar
Class 3B Laser
 
Join Date: Oct 2007
Posts: 2,631
Rep Power: 143
amkdeath has a reputation beyond reputeamkdeath has a reputation beyond reputeamkdeath has a reputation beyond reputeamkdeath has a reputation beyond reputeamkdeath has a reputation beyond reputeamkdeath has a reputation beyond reputeamkdeath has a reputation beyond reputeamkdeath has a reputation beyond reputeamkdeath has a reputation beyond reputeamkdeath has a reputation beyond reputeamkdeath has a reputation beyond repute
amkdeath amkdeath is offline
Class 3B Laser
amkdeath's Avatar
 
Join Date: Oct 2007
Posts: 2,631
Rep Power: 143
amkdeath has a reputation beyond reputeamkdeath has a reputation beyond reputeamkdeath has a reputation beyond reputeamkdeath has a reputation beyond reputeamkdeath has a reputation beyond reputeamkdeath has a reputation beyond reputeamkdeath has a reputation beyond reputeamkdeath has a reputation beyond reputeamkdeath has a reputation beyond reputeamkdeath has a reputation beyond reputeamkdeath has a reputation beyond repute
Default PROBLEM SOLVED

Sorry for ant misconception, or If I offended anybody, you were all a big help

2 things:
1st solution: more load
I hooked up a DC motor to the end instead of an LED, (BIG load difference, i hooked a big motor) and I got the pot working and all was well

2nd Solution: More input voltage
I hooked up more batteries (i had only 4 hooked up) and The pot was working, I was getting 3 volts instead of 5.something the pot could take it from 3 volts all the way down to 1.9 volts.
Thank you Gazoo, fox, and everybody else who contributed.

one last question... can I hook up my diode now?

THANK YOU VERY VERY MUCH
sorry for any confusion
please forgive me for any offence

amk
__________________
My Webpage:
http://www.AmirRK.com
amkdeath is offline   Reply With Quote
Old 11-05-2007, 02:01 AM #25
amkdeath's Avatar
Class 3B Laser
 
Join Date: Oct 2007
Posts: 2,631
Rep Power: 143
amkdeath has a reputation beyond reputeamkdeath has a reputation beyond reputeamkdeath has a reputation beyond reputeamkdeath has a reputation beyond reputeamkdeath has a reputation beyond reputeamkdeath has a reputation beyond reputeamkdeath has a reputation beyond reputeamkdeath has a reputation beyond reputeamkdeath has a reputation beyond reputeamkdeath has a reputation beyond reputeamkdeath has a reputation beyond repute
amkdeath amkdeath is offline
Class 3B Laser
amkdeath's Avatar
 
Join Date: Oct 2007
Posts: 2,631
Rep Power: 143
amkdeath has a reputation beyond reputeamkdeath has a reputation beyond reputeamkdeath has a reputation beyond reputeamkdeath has a reputation beyond reputeamkdeath has a reputation beyond reputeamkdeath has a reputation beyond reputeamkdeath has a reputation beyond reputeamkdeath has a reputation beyond reputeamkdeath has a reputation beyond reputeamkdeath has a reputation beyond reputeamkdeath has a reputation beyond repute
Default Re: Did I screw my driver??

thank you grey fox, now I cant wait untill my diode arrives from SenKat....
;D :P

__________________
My Webpage:
http://www.AmirRK.com
amkdeath is offline   Reply With Quote
Old 11-05-2007, 02:06 AM #26
Class 1M Laser
 
Join Date: Sep 2007
Posts: 209
Rep Power: 10
Greyfox is on a distinguished road
Greyfox Greyfox is offline
Class 1M Laser
 
Join Date: Sep 2007
Posts: 209
Rep Power: 10
Greyfox is on a distinguished road
Default Re: Did I screw my driver??

Personally, I'd run one more check. Connect an ammeter in series with your motor load and adjust the pot. See what kind of current range you get. You should have from around 50mA up to 300mA+. If you do indeed have this range, you're ready to go. A few things I always do to protect equipment:

Disconnect the regulator's input supply.
* The current regulator has a tendency to send a spike if it is powered up before a load is connected.
By powering it down before connecting the load, you reduce the likelihood that this will happen.
Connect an ammeter in series with the laser module.
Check the optics (laser lens, etc) and heatsink after connecting the laser diode/module to the power supply.
Lower the current to beneath the eventual operating current.
Turn it on and make the final adjustments under power, with focus adjustments done at minimum power.

and above all else: Stay safe and have fun!

Edit: Removed a mistaken mention thanks to the evening running along.
Greyfox is offline   Reply With Quote
Old 11-05-2007, 09:37 AM #27
Benm's Avatar
Class 4 Laser
 
Join Date: Aug 2007
Location: Netherlands
Posts: 7,428
Rep Power: 15904
Benm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond repute
Benm Benm is online now
Class 4 Laser
Benm's Avatar
 
Join Date: Aug 2007
Location: Netherlands
Posts: 7,428
Rep Power: 15904
Benm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond repute
Default Re: Did I screw my driver??

Quote:
Originally Posted by The Grey Fox
With 6V input, you should be able to see as much as 4.75V on the output. If you weren't getting that, you may want to check the connection where the power is taken for your load.
Not really, at least not when driving a load. You would lose at leat 1.25 volt in the reference, and also at least 1 volt in the actual regulator, and that's when the LM317 is performing better than specified (most do).

You should really just measure output current, preferably when driving a realistic load such as a power LED or a couple of diodes in series. But since this is a current source, you can even just hook an ampmeter to the output (shorting it) to check the value.
Benm is online now   Reply With Quote
Old 11-05-2007, 12:49 PM #28
Class 1M Laser
 
Join Date: Sep 2007
Posts: 209
Rep Power: 10
Greyfox is on a distinguished road
Greyfox Greyfox is offline
Class 1M Laser
 
Join Date: Sep 2007
Posts: 209
Rep Power: 10
Greyfox is on a distinguished road
Default Re: Did I screw my driver??

Good point. I had forgotten about the losses inherent in passing through silicon. You might see up to that, but only on brand new batteries from the box. Current output is the best measurement for a current regulator anyway.
Greyfox is offline   Reply With Quote
Old 11-06-2007, 01:27 AM #29
amkdeath's Avatar
Class 3B Laser
 
Join Date: Oct 2007
Posts: 2,631
Rep Power: 143
amkdeath has a reputation beyond reputeamkdeath has a reputation beyond reputeamkdeath has a reputation beyond reputeamkdeath has a reputation beyond reputeamkdeath has a reputation beyond reputeamkdeath has a reputation beyond reputeamkdeath has a reputation beyond reputeamkdeath has a reputation beyond reputeamkdeath has a reputation beyond reputeamkdeath has a reputation beyond reputeamkdeath has a reputation beyond repute
amkdeath amkdeath is offline
Class 3B Laser
amkdeath's Avatar
 
Join Date: Oct 2007
Posts: 2,631
Rep Power: 143
amkdeath has a reputation beyond reputeamkdeath has a reputation beyond reputeamkdeath has a reputation beyond reputeamkdeath has a reputation beyond reputeamkdeath has a reputation beyond reputeamkdeath has a reputation beyond reputeamkdeath has a reputation beyond reputeamkdeath has a reputation beyond reputeamkdeath has a reputation beyond reputeamkdeath has a reputation beyond reputeamkdeath has a reputation beyond repute
Default Re: Did I screw my driver??

sigh, It worked, I scavenged a diode from an old 50X CDRW/16XDVD burner thing. Burned like hell even without aixiz module or focusing. Took it out, soldered new wires and it still burned like hell. then I accidentally shorted the diode and now I have an LED...

ME SO SAD
oh well I guess Ill just have to wait for SenKat's diode to arrive.
__________________
My Webpage:
http://www.AmirRK.com
amkdeath is offline   Reply With Quote
Old 11-06-2007, 03:49 AM #30
Class 1M Laser
 
Join Date: Nov 2007
Posts: 219
Rep Power: 10
Lorgar is on a distinguished road
Send a message via Yahoo to Lorgar
Lorgar Lorgar is offline
Class 1M Laser
 
Join Date: Nov 2007
Posts: 219
Rep Power: 10
Lorgar is on a distinguished road
Send a message via Yahoo to Lorgar
Default Re: Did I screw my driver??

Hiya I know im new but I have the same Lm 317 as Amkdeath its a LM317T the info i found on this one shows the Adj on the left pin when looking at the front

I got my info here circuit - innovations . co . uk / LM317 . html

I hooked it up going by that pic as mine was a bulk pack

works fine tried out a 1w lux LED star and i can adjust from sorta bright to blind the room bright

(sory wont let me post links yet )
Lorgar is offline   Reply With Quote
Old 11-06-2007, 04:05 AM #31
amkdeath's Avatar
Class 3B Laser
 
Join Date: Oct 2007
Posts: 2,631
Rep Power: 143
amkdeath has a reputation beyond reputeamkdeath has a reputation beyond reputeamkdeath has a reputation beyond reputeamkdeath has a reputation beyond reputeamkdeath has a reputation beyond reputeamkdeath has a reputation beyond reputeamkdeath has a reputation beyond reputeamkdeath has a reputation beyond reputeamkdeath has a reputation beyond reputeamkdeath has a reputation beyond reputeamkdeath has a reputation beyond repute
amkdeath amkdeath is offline
Class 3B Laser
amkdeath's Avatar
 
Join Date: Oct 2007
Posts: 2,631
Rep Power: 143
amkdeath has a reputation beyond reputeamkdeath has a reputation beyond reputeamkdeath has a reputation beyond reputeamkdeath has a reputation beyond reputeamkdeath has a reputation beyond reputeamkdeath has a reputation beyond reputeamkdeath has a reputation beyond reputeamkdeath has a reputation beyond reputeamkdeath has a reputation beyond reputeamkdeath has a reputation beyond reputeamkdeath has a reputation beyond repute
Default Re: Did I screw my driver??

Yea we got the problem fixed, turns out that I didnt have enough load, and that was causing my LM to just be lazy and do nothing. Preety good circuit, Can wait for my SenKat diode.......

__________________
My Webpage:
http://www.AmirRK.com
amkdeath is offline   Reply With Quote
Old 11-06-2007, 11:01 AM #32
Class 1M Laser
 
Join Date: Nov 2007
Posts: 219
Rep Power: 10
Lorgar is on a distinguished road
Send a message via Yahoo to Lorgar
Lorgar Lorgar is offline
Class 1M Laser
 
Join Date: Nov 2007
Posts: 219
Rep Power: 10
Lorgar is on a distinguished road
Send a message via Yahoo to Lorgar
Default Re: Did I screw my driver??

I like it as well
Lots of good ideas in this group

Now i just need to make it smaller
Lorgar 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 03:19 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