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 > 445nm Lasers



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



Reply
 
LinkBack Thread Tools Display Modes
Old 01-03-2011, 06:57 PM #1
itsmei's Avatar
Class 1M Laser
 
Join Date: Dec 2009
Location: England
Posts: 151
Rep Power: 8
itsmei is on a distinguished road
itsmei itsmei is offline
Class 1M Laser
itsmei's Avatar
 
Join Date: Dec 2009
Location: England
Posts: 151
Rep Power: 8
itsmei is on a distinguished road
Default LM317 Driver question

Hi,
The plan is that i am going to build my own driver for when i get a 445nm A-140 1W diode, i will be running it at 1250mA and having 7.4v by using 2x 18650 batteries.

The parts:
LM317
1ohm resistor
47uF 35V capacitor
50ohm pot
IN4001 diode

A 1ohm resistor allows 1250mA to be drawn, that is the amount of current i am going set to the diode. I am going to get the 50ohm pot and make it come out of the "lab" style case so it the power input is adjustable, this way when the pot is set to maximum i will have 1250mA which is ~1 watt, if i want less power i will simply adjust the 50ohm pot lower. Does this sound a good idea?

The question is that if i keep turning the pot, will it eventually break or blow the diode?

Thanks


itsmei is offline   Reply With Quote







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







Old 01-03-2011, 07:25 PM #2
midias's Avatar
Class 2M Laser
 
Join Date: Mar 2010
Posts: 639
Rep Power: 32
midias has a reputation beyond reputemidias has a reputation beyond reputemidias has a reputation beyond reputemidias has a reputation beyond reputemidias has a reputation beyond reputemidias has a reputation beyond reputemidias has a reputation beyond reputemidias has a reputation beyond reputemidias has a reputation beyond reputemidias has a reputation beyond reputemidias has a reputation beyond repute
midias midias is offline
Class 2M Laser
midias's Avatar
 
Join Date: Mar 2010
Posts: 639
Rep Power: 32
midias has a reputation beyond reputemidias has a reputation beyond reputemidias has a reputation beyond reputemidias has a reputation beyond reputemidias has a reputation beyond reputemidias has a reputation beyond reputemidias has a reputation beyond reputemidias has a reputation beyond reputemidias has a reputation beyond reputemidias has a reputation beyond reputemidias has a reputation beyond repute
Default Re: LM317 Driver question

You never said if you were going to be in series or parallel with the pot and the 1 ohm resistor. But it sounds like a good plan. Personally I would add a 0.1uf cap at both the in and output of the driver or at least at the input. Also at 1.25A don't forget the heatsink.

Ideal voltage for a bluray or 445 diode would be around 8.5V I am not sure if 7.4 will be enough I may add an extra 18650 batter in there. Also don't forget that at 1.25A across the resistor your PD is ~1.56W so get a resistor that can handle it accordingly.

Personally for higher wattage builds I prefer some parallel resistance as in 2 X 2 ohm resistors to cut the PD in each one in half then put the pot inline with one of the two. Here is a picture. You do not have to take my advice I just sometimes over build a little.

__________________
405nm 31mw "<5mw" China Cheapie
405nm 71mw Samsung player harvest maglight build 115ma Flex Drive
405nm 223mw 6X Cree Build 210ma Flex Drive
445nm >1050mw 16850 Build 1300ma Flex Drive
445nm pen pointer ~20mw
473nm 20mw BWB-10-OEM lab unit
Way OverSpec 532nm 5mw Green (24mw)
532nm 82mw "50mw" Green
532nm 116mw Super Green Beast 100
635nm 46mw Pen Pointer with LM337 Driver
635nm 37mw Super Red Beast 006
635nm 235mw Mitsubishi Build
650nm 5mw Aluminum pointer
660nm 109mw 16X Lab Bud Box Build 200ma LM317 Drive
660nm 249mw LOC Hotlights Build Flex Drive
685nm 36mw LM317L Pen Build




Laserbee I
midias is offline   Reply With Quote
Old 01-03-2011, 09:00 PM #3
itsmei's Avatar
Class 1M Laser
 
Join Date: Dec 2009
Location: England
Posts: 151
Rep Power: 8
itsmei is on a distinguished road
itsmei itsmei is offline
Class 1M Laser
itsmei's Avatar
 
Join Date: Dec 2009
Location: England
Posts: 151
Rep Power: 8
itsmei is on a distinguished road
Default Re: LM317 Driver question

That is great information you have given, i will be getting 2x 0.47ohm resistors in parallel with the pot inbetween. The resistors have a 7watt power rating, so they will not get hot. I will get 3 186500 batteries to get me 10.5v, i will put them in series. I am building a portable "lab" style laser, so a lot of it will be a heatsink, that way the driver and diode will be kept cool.

Can anyone answer another question which is, if i just turn a pot will it eventually break the pot or will it reset to 0 for the power input. I just don't want to risk killing my diode, as i am making an adjustable pot which comes out of the box so i can adjust it at any time.

Thanks

P.S can anyone suggest some good qualty glasses, i thought of these Laser Glasses - UV to Green Lasers Protection 190-548nm :: Laser Safety :: Dragon Lasers , i just don't want to risk my eyes. I want to keep my eyes, so i want a good pair!
itsmei is offline   Reply With Quote
Old 01-03-2011, 09:42 PM #4
midias's Avatar
Class 2M Laser
 
Join Date: Mar 2010
Posts: 639
Rep Power: 32
midias has a reputation beyond reputemidias has a reputation beyond reputemidias has a reputation beyond reputemidias has a reputation beyond reputemidias has a reputation beyond reputemidias has a reputation beyond reputemidias has a reputation beyond reputemidias has a reputation beyond reputemidias has a reputation beyond reputemidias has a reputation beyond reputemidias has a reputation beyond repute
midias midias is offline
Class 2M Laser
midias's Avatar
 
Join Date: Mar 2010
Posts: 639
Rep Power: 32
midias has a reputation beyond reputemidias has a reputation beyond reputemidias has a reputation beyond reputemidias has a reputation beyond reputemidias has a reputation beyond reputemidias has a reputation beyond reputemidias has a reputation beyond reputemidias has a reputation beyond reputemidias has a reputation beyond reputemidias has a reputation beyond reputemidias has a reputation beyond repute
Default Re: LM317 Driver question

Quote:
Originally Posted by itsmei View Post
That is great information you have given, i will be getting 2x 0.47ohm resistors in parallel with the pot inbetween. The resistors have a 7watt power rating, so they will not get hot. I will get 3 186500 batteries to get me 10.5v, i will put them in series. I am building a portable "lab" style laser, so a lot of it will be a heatsink, that way the driver and diode will be kept cool.

Can anyone answer another question which is, if i just turn a pot will it eventually break the pot or will it reset to 0 for the power input. I just don't want to risk killing my diode, as i am making an adjustable pot which comes out of the box so i can adjust it at any time.

Thanks

P.S can anyone suggest some good qualty glasses, i thought of these Laser Glasses - UV to Green Lasers Protection 190-548nm :: Laser Safety :: Dragon Lasers , i just don't want to risk my eyes. I want to keep my eyes, so i want a good pair!
Check this out for resistor adding
Adding components in series and parallel

2 0.47 resistors in parallel will = ~0.235 ohms you would want 2 x 2ohm resistors.

For the POT you will notice larger pots have a hard stop on them so you will not be able to turn it too far and break it by turning it.
__________________
405nm 31mw "<5mw" China Cheapie
405nm 71mw Samsung player harvest maglight build 115ma Flex Drive
405nm 223mw 6X Cree Build 210ma Flex Drive
445nm >1050mw 16850 Build 1300ma Flex Drive
445nm pen pointer ~20mw
473nm 20mw BWB-10-OEM lab unit
Way OverSpec 532nm 5mw Green (24mw)
532nm 82mw "50mw" Green
532nm 116mw Super Green Beast 100
635nm 46mw Pen Pointer with LM337 Driver
635nm 37mw Super Red Beast 006
635nm 235mw Mitsubishi Build
650nm 5mw Aluminum pointer
660nm 109mw 16X Lab Bud Box Build 200ma LM317 Drive
660nm 249mw LOC Hotlights Build Flex Drive
685nm 36mw LM317L Pen Build




Laserbee I
midias is offline   Reply With Quote
Old 01-04-2011, 04:35 PM #5
itsmei's Avatar
Class 1M Laser
 
Join Date: Dec 2009
Location: England
Posts: 151
Rep Power: 8
itsmei is on a distinguished road
itsmei itsmei is offline
Class 1M Laser
itsmei's Avatar
 
Join Date: Dec 2009
Location: England
Posts: 151
Rep Power: 8
itsmei is on a distinguished road
Default Re: LM317 Driver question

Quote:
2 0.47 resistors in parallel will = ~0.235 ohms you would want 2 x 2ohm resistors.
Ahhh sorry! Got them mixed up.... Anyway i will get 2 x 2ohm resistors, in parallel.

Quote:
For the POT you will notice larger pots have a hard stop on them so you will not be able to turn it too far and break it by turning it.
Will smaller pots have a stop, will this pot have a stop to it. If it does not have a pot, will it break?

SubMiniature Fully EnclosedCarbon Preset Potentiometers : Potentiometers : Maplin
itsmei is offline   Reply With Quote
Old 01-04-2011, 05:29 PM #6
midias's Avatar
Class 2M Laser
 
Join Date: Mar 2010
Posts: 639
Rep Power: 32
midias has a reputation beyond reputemidias has a reputation beyond reputemidias has a reputation beyond reputemidias has a reputation beyond reputemidias has a reputation beyond reputemidias has a reputation beyond reputemidias has a reputation beyond reputemidias has a reputation beyond reputemidias has a reputation beyond reputemidias has a reputation beyond reputemidias has a reputation beyond repute
midias midias is offline
Class 2M Laser
midias's Avatar
 
Join Date: Mar 2010
Posts: 639
Rep Power: 32
midias has a reputation beyond reputemidias has a reputation beyond reputemidias has a reputation beyond reputemidias has a reputation beyond reputemidias has a reputation beyond reputemidias has a reputation beyond reputemidias has a reputation beyond reputemidias has a reputation beyond reputemidias has a reputation beyond reputemidias has a reputation beyond reputemidias has a reputation beyond repute
Default Re: LM317 Driver question

That pot does have a hard stop in it and should work just be careful because it is only .15w I made an excel sheet and it looks like worst case through the pot you will get ~400mw PD.

I have attached a Zip file with the sheet someone let me know if I calculated something wrong. This is just guessing you are using 2 1W resistors in parallel with the POT in series after them.
Attached Files
File Type: zip lm317pot.zip (8.2 KB, 56 views)
__________________
405nm 31mw "<5mw" China Cheapie
405nm 71mw Samsung player harvest maglight build 115ma Flex Drive
405nm 223mw 6X Cree Build 210ma Flex Drive
445nm >1050mw 16850 Build 1300ma Flex Drive
445nm pen pointer ~20mw
473nm 20mw BWB-10-OEM lab unit
Way OverSpec 532nm 5mw Green (24mw)
532nm 82mw "50mw" Green
532nm 116mw Super Green Beast 100
635nm 46mw Pen Pointer with LM337 Driver
635nm 37mw Super Red Beast 006
635nm 235mw Mitsubishi Build
650nm 5mw Aluminum pointer
660nm 109mw 16X Lab Bud Box Build 200ma LM317 Drive
660nm 249mw LOC Hotlights Build Flex Drive
685nm 36mw LM317L Pen Build




Laserbee I

Last edited by midias; 01-04-2011 at 05:33 PM.
midias is offline   Reply With Quote
Old 01-04-2011, 05:35 PM #7
Kevlar's Avatar
Class 3R Laser
 
Join Date: Apr 2010
Location: Mass
Posts: 1,353
Rep Power: 101
Kevlar has a reputation beyond reputeKevlar has a reputation beyond reputeKevlar has a reputation beyond reputeKevlar has a reputation beyond reputeKevlar has a reputation beyond reputeKevlar has a reputation beyond reputeKevlar has a reputation beyond reputeKevlar has a reputation beyond reputeKevlar has a reputation beyond reputeKevlar has a reputation beyond reputeKevlar has a reputation beyond repute
Kevlar Kevlar is offline
Class 3R Laser
Kevlar's Avatar
 
Join Date: Apr 2010
Location: Mass
Posts: 1,353
Rep Power: 101
Kevlar has a reputation beyond reputeKevlar has a reputation beyond reputeKevlar has a reputation beyond reputeKevlar has a reputation beyond reputeKevlar has a reputation beyond reputeKevlar has a reputation beyond reputeKevlar has a reputation beyond reputeKevlar has a reputation beyond reputeKevlar has a reputation beyond reputeKevlar has a reputation beyond reputeKevlar has a reputation beyond repute
Default Re: LM317 Driver question

If you're making a lab style laser why don't you use a bigger pot that you can put a knob on instead of pulling out a screwdriver whenever you want to adjust it?

Like this one is a 25 Ohm 3 Watt: 25-Ohm 3-Watt Rheostat - RadioShack.com

Just a thought.
Kevlar is offline   Reply With Quote
Old 01-04-2011, 06:06 PM #8
Cyparagon's Avatar
Class 4 Laser
 
Join Date: Sep 2007
Location: Wisconsin
Posts: 9,144
Rep Power: 9321
Cyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond repute
Cyparagon Cyparagon is online now
Class 4 Laser
Cyparagon's Avatar
 
Join Date: Sep 2007
Location: Wisconsin
Posts: 9,144
Rep Power: 9321
Cyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond repute
Default Re: LM317 Driver question

^That one is a good choice. I use it with my set up. The only problem is the current is still under threshold for about 80% of the turn angle.

Quote:
Originally Posted by itsmei View Post
Ahhh sorry! Got them mixed up.... Anyway i will get 2 x 2ohm resistors, in parallel.
If you already have 2 0.47Ω resistors, wire them in series instead.
__________________
A problem well stated is a problem half solved.
Cyparagon is online now   Reply With Quote
Old 01-04-2011, 06:08 PM #9
midias's Avatar
Class 2M Laser
 
Join Date: Mar 2010
Posts: 639
Rep Power: 32
midias has a reputation beyond reputemidias has a reputation beyond reputemidias has a reputation beyond reputemidias has a reputation beyond reputemidias has a reputation beyond reputemidias has a reputation beyond reputemidias has a reputation beyond reputemidias has a reputation beyond reputemidias has a reputation beyond reputemidias has a reputation beyond reputemidias has a reputation beyond repute
midias midias is offline
Class 2M Laser
midias's Avatar
 
Join Date: Mar 2010
Posts: 639
Rep Power: 32
midias has a reputation beyond reputemidias has a reputation beyond reputemidias has a reputation beyond reputemidias has a reputation beyond reputemidias has a reputation beyond reputemidias has a reputation beyond reputemidias has a reputation beyond reputemidias has a reputation beyond reputemidias has a reputation beyond reputemidias has a reputation beyond reputemidias has a reputation beyond repute
Default Re: LM317 Driver question

^true once you get over ~6 ohms total resistance your 445 will not do anything significant.
__________________
405nm 31mw "<5mw" China Cheapie
405nm 71mw Samsung player harvest maglight build 115ma Flex Drive
405nm 223mw 6X Cree Build 210ma Flex Drive
445nm >1050mw 16850 Build 1300ma Flex Drive
445nm pen pointer ~20mw
473nm 20mw BWB-10-OEM lab unit
Way OverSpec 532nm 5mw Green (24mw)
532nm 82mw "50mw" Green
532nm 116mw Super Green Beast 100
635nm 46mw Pen Pointer with LM337 Driver
635nm 37mw Super Red Beast 006
635nm 235mw Mitsubishi Build
650nm 5mw Aluminum pointer
660nm 109mw 16X Lab Bud Box Build 200ma LM317 Drive
660nm 249mw LOC Hotlights Build Flex Drive
685nm 36mw LM317L Pen Build




Laserbee I
midias is offline   Reply With Quote
Old 01-04-2011, 07:08 PM #10
itsmei's Avatar
Class 1M Laser
 
Join Date: Dec 2009
Location: England
Posts: 151
Rep Power: 8
itsmei is on a distinguished road
itsmei itsmei is offline
Class 1M Laser
itsmei's Avatar
 
Join Date: Dec 2009
Location: England
Posts: 151
Rep Power: 8
itsmei is on a distinguished road
Default Re: LM317 Driver question

Quote:
If you're making a lab style laser why don't you use a bigger pot that you can put a knob on instead of pulling out a screwdriver whenever you want to adjust it?

Like this one is a 25 Ohm 3 Watt: 25-Ohm 3-Watt Rheostat - RadioShack.com

Just a thought.
ooooo thank you! I have been trying to find one so i can adjust it, thanks!

I was thinking, do you think as i am going to have a HUGE heatsink i will be able to power my A-140 diode up to 2w. I was thinking if i was going to do this i will need a better regulator, so i found one that supports 2A, which is here:
STMicroelectronics | Semiconductors | Power Management | Linear Regulator | Positive Voltage Regulators |L78S15CV
I will also get a good couple of resistors which will allow more than 2watt of current each so they do not get hot. I will be putting 2x 1ohm resistors in parallel. I will be adding a huge heatsink so heat isn't a worry. Will this work?
itsmei is offline   Reply With Quote
Old 01-04-2011, 07:18 PM #11
midias's Avatar
Class 2M Laser
 
Join Date: Mar 2010
Posts: 639
Rep Power: 32
midias has a reputation beyond reputemidias has a reputation beyond reputemidias has a reputation beyond reputemidias has a reputation beyond reputemidias has a reputation beyond reputemidias has a reputation beyond reputemidias has a reputation beyond reputemidias has a reputation beyond reputemidias has a reputation beyond reputemidias has a reputation beyond reputemidias has a reputation beyond repute
midias midias is offline
Class 2M Laser
midias's Avatar
 
Join Date: Mar 2010
Posts: 639
Rep Power: 32
midias has a reputation beyond reputemidias has a reputation beyond reputemidias has a reputation beyond reputemidias has a reputation beyond reputemidias has a reputation beyond reputemidias has a reputation beyond reputemidias has a reputation beyond reputemidias has a reputation beyond reputemidias has a reputation beyond reputemidias has a reputation beyond reputemidias has a reputation beyond repute
Default Re: LM317 Driver question

Quote:
Originally Posted by itsmei View Post
ooooo thank you! I have been trying to find one so i can adjust it, thanks!

I was thinking, do you think as i am going to have a HUGE heatsink i will be able to power my A-140 diode up to 2w. I was thinking if i was going to do this i will need a better regulator, so i found one that supports 2A, which is here:
STMicroelectronics | Semiconductors | Power Management | Linear Regulator | Positive Voltage Regulators |L78S15CV
I will also get a good couple of resistors which will allow more than 2watt of current each so they do not get hot. I will be putting 2x 1ohm resistors in parallel. I will be adding a huge heatsink so heat isn't a worry. Will this work?
That is a fixed 15V regulator I do not think it will work the same but somebody may correct me.

You could try this VREF is the same at 1.25V

Digi-Key - 497-1482-5-ND (Manufacturer - LD1085V)

You could also run 2 LM317s in parallel
__________________
405nm 31mw "<5mw" China Cheapie
405nm 71mw Samsung player harvest maglight build 115ma Flex Drive
405nm 223mw 6X Cree Build 210ma Flex Drive
445nm >1050mw 16850 Build 1300ma Flex Drive
445nm pen pointer ~20mw
473nm 20mw BWB-10-OEM lab unit
Way OverSpec 532nm 5mw Green (24mw)
532nm 82mw "50mw" Green
532nm 116mw Super Green Beast 100
635nm 46mw Pen Pointer with LM337 Driver
635nm 37mw Super Red Beast 006
635nm 235mw Mitsubishi Build
650nm 5mw Aluminum pointer
660nm 109mw 16X Lab Bud Box Build 200ma LM317 Drive
660nm 249mw LOC Hotlights Build Flex Drive
685nm 36mw LM317L Pen Build




Laserbee I

Last edited by midias; 01-04-2011 at 07:20 PM.
midias is offline   Reply With Quote
Old 01-04-2011, 08:24 PM #12
Kevlar's Avatar
Class 3R Laser
 
Join Date: Apr 2010
Location: Mass
Posts: 1,353
Rep Power: 101
Kevlar has a reputation beyond reputeKevlar has a reputation beyond reputeKevlar has a reputation beyond reputeKevlar has a reputation beyond reputeKevlar has a reputation beyond reputeKevlar has a reputation beyond reputeKevlar has a reputation beyond reputeKevlar has a reputation beyond reputeKevlar has a reputation beyond reputeKevlar has a reputation beyond reputeKevlar has a reputation beyond repute
Kevlar Kevlar is offline
Class 3R Laser
Kevlar's Avatar
 
Join Date: Apr 2010
Location: Mass
Posts: 1,353
Rep Power: 101
Kevlar has a reputation beyond reputeKevlar has a reputation beyond reputeKevlar has a reputation beyond reputeKevlar has a reputation beyond reputeKevlar has a reputation beyond reputeKevlar has a reputation beyond reputeKevlar has a reputation beyond reputeKevlar has a reputation beyond reputeKevlar has a reputation beyond reputeKevlar has a reputation beyond reputeKevlar has a reputation beyond repute
Default Re: LM317 Driver question

Or a LM350, I believe it's rated up to 3A.
Kevlar is offline   Reply With Quote
Old 01-04-2011, 09:34 PM #13
jib77's Avatar
Class 2M Laser
 
Join Date: Jun 2010
Location: DFW, TX
Posts: 718
Rep Power: 38
jib77 has a reputation beyond reputejib77 has a reputation beyond reputejib77 has a reputation beyond reputejib77 has a reputation beyond reputejib77 has a reputation beyond reputejib77 has a reputation beyond reputejib77 has a reputation beyond reputejib77 has a reputation beyond reputejib77 has a reputation beyond reputejib77 has a reputation beyond reputejib77 has a reputation beyond repute
jib77 jib77 is offline
Class 2M Laser
jib77's Avatar
 
Join Date: Jun 2010
Location: DFW, TX
Posts: 718
Rep Power: 38
jib77 has a reputation beyond reputejib77 has a reputation beyond reputejib77 has a reputation beyond reputejib77 has a reputation beyond reputejib77 has a reputation beyond reputejib77 has a reputation beyond reputejib77 has a reputation beyond reputejib77 has a reputation beyond reputejib77 has a reputation beyond reputejib77 has a reputation beyond reputejib77 has a reputation beyond repute
Default Re: LM317 Driver question

Ive used the LD1085V for some stuff at work ... good stuff, but because its a LDO you will need at least 10uF caps on the Vin and Vout pins.
__________________

50mW O-Like New Pocket Greenie OLCGL50

100mW+ PHR/MicroBoost V1/Jayrob Chrome Pocket Mini (140mA)
445nm, Flexdrive V5, Ehgemus 18650 Polished Host (Murdered )
445nm, JibDrive 1.2A, Ehgemus 1x26650 Alien Host
LCC Red 200mW in Custom Ehgemus CR123A Host

FS - My cheap LM1117 driver: >>LINK<<

Cheap PCB prototypes: >>LINK<<


レイセーたちはすごいですよ。
jib77 is offline   Reply With Quote
Old 01-05-2011, 05:04 PM #14
itsmei's Avatar
Class 1M Laser
 
Join Date: Dec 2009
Location: England
Posts: 151
Rep Power: 8
itsmei is on a distinguished road
itsmei itsmei is offline
Class 1M Laser
itsmei's Avatar
 
Join Date: Dec 2009
Location: England
Posts: 151
Rep Power: 8
itsmei is on a distinguished road
Default Re: LM317 Driver question

my plan was that i was going to use 47uF 35 volt capacitors. If i get this, will it work for making a 2watt laser?
regulator: Digi-Key - 497-1482-5-ND (Manufacturer - LD1085V)
This pot:25-Ohm 3-Watt Rheostat - RadioShack.com
A 47uF 35v capacitor.
2xcapacitor of 1ohm each in parallel to get me 0.5ohm, i will use more than 2 watt input.
3x 18650 batteries which will make 9.1v.


Now i do you think the above is good?

I got a couple of questions though:
What Rectifier Diode do you recommend?
How many mA do you recommend running the A-140 diode at for best and most powerful results? And what mW would it give me?
What good safety glasses would you recommend? I was thinking of these: Laser Glasses - UV to Green Lasers Protection 190-548nm :: Laser Safety :: Dragon Lasers

Thanks!

Last edited by itsmei; 01-05-2011 at 07:59 PM.
itsmei is offline   Reply With Quote
Old 01-05-2011, 05:19 PM #15
Class 3R Laser
 
Join Date: Nov 2010
Location: Portugal
Posts: 2,470
Rep Power: 84
anselm has a reputation beyond reputeanselm has a reputation beyond reputeanselm has a reputation beyond reputeanselm has a reputation beyond reputeanselm has a reputation beyond reputeanselm has a reputation beyond reputeanselm has a reputation beyond reputeanselm has a reputation beyond reputeanselm has a reputation beyond reputeanselm has a reputation beyond reputeanselm has a reputation beyond repute
anselm anselm is offline
Class 3R Laser
 
Join Date: Nov 2010
Location: Portugal
Posts: 2,470
Rep Power: 84
anselm has a reputation beyond reputeanselm has a reputation beyond reputeanselm has a reputation beyond reputeanselm has a reputation beyond reputeanselm has a reputation beyond reputeanselm has a reputation beyond reputeanselm has a reputation beyond reputeanselm has a reputation beyond reputeanselm has a reputation beyond reputeanselm has a reputation beyond reputeanselm has a reputation beyond repute
Default Re: LM317 Driver question

Quote:
3x 18650 batteries which will make 9.1v.
No 3x 18650 gives you ~12V
Quote:
How many mA do you recommend running the A-140 diode at for best and most powerful results?
Hmm 800mA already makes for a strong and nice beam.
At 1200mA, it'll burn faster but it will not be signififcantly brighter.
I wouldn't push more than 1500mA if you want your diode to live a long and happy life.
__________________
I'm away from home and lasers until late July!
Kryton Groove switch workaround
Get your warning label stickers 0.90$ or less, depending on qty
The INDEX to the LPF
Add to it, and spam it from your signature, too!
Beware! Scams a-plenty, don't be a sucker!
___________________________
ATTENTION
This forum is fullfilled mit special electronische equippment. Fingergrabbing and pressing the cnoeppkes from the lasers is
allowed for die experts only! So all the “lefthanders” stay away and do not disturben the brainstorming von here working
intelligencies. Otherwise you will be out thrown and kicked anderswhere! Also: please keep still and only watchen astaunished the blinkenlights.

Last edited by anselm; 01-05-2011 at 05:22 PM.
anselm is offline   Reply With Quote
Old 01-05-2011, 05:34 PM #16
jib77's Avatar
Class 2M Laser
 
Join Date: Jun 2010
Location: DFW, TX
Posts: 718
Rep Power: 38
jib77 has a reputation beyond reputejib77 has a reputation beyond reputejib77 has a reputation beyond reputejib77 has a reputation beyond reputejib77 has a reputation beyond reputejib77 has a reputation beyond reputejib77 has a reputation beyond reputejib77 has a reputation beyond reputejib77 has a reputation beyond reputejib77 has a reputation beyond reputejib77 has a reputation beyond repute
jib77 jib77 is offline
Class 2M Laser
jib77's Avatar
 
Join Date: Jun 2010
Location: DFW, TX
Posts: 718
Rep Power: 38
jib77 has a reputation beyond reputejib77 has a reputation beyond reputejib77 has a reputation beyond reputejib77 has a reputation beyond reputejib77 has a reputation beyond reputejib77 has a reputation beyond reputejib77 has a reputation beyond reputejib77 has a reputation beyond reputejib77 has a reputation beyond reputejib77 has a reputation beyond reputejib77 has a reputation beyond repute
Default Re: LM317 Driver question

For a 3A continuous current rectifier I use a OnSemi 1N5401G. Put a cap on the input otherwise the LD1085V will not be stable(datasheet recommends 10uF, but another 47uF should be fine). Your resistors will need to handle 3.75W, make sure they are rated 2W each so you get a total 4W of available power dissipation.
__________________

50mW O-Like New Pocket Greenie OLCGL50

100mW+ PHR/MicroBoost V1/Jayrob Chrome Pocket Mini (140mA)
445nm, Flexdrive V5, Ehgemus 18650 Polished Host (Murdered )
445nm, JibDrive 1.2A, Ehgemus 1x26650 Alien Host
LCC Red 200mW in Custom Ehgemus CR123A Host

FS - My cheap LM1117 driver: >>LINK<<

Cheap PCB prototypes: >>LINK<<


レイセーたちはすごいですよ。
jib77 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 03:49 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