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 > Drivers, Test-load, Power Supply, & Batteries



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



Reply
 
LinkBack Thread Tools Display Modes
Old 02-19-2012, 11:48 PM #177
DTR's Avatar
DTR DTR is online now
Class 4 Laser
 
Join Date: Jun 2010
Location: St. Louis MO
Posts: 5,482
Rep Power: 10819
DTR has a reputation beyond reputeDTR has a reputation beyond reputeDTR has a reputation beyond reputeDTR has a reputation beyond reputeDTR has a reputation beyond reputeDTR has a reputation beyond reputeDTR has a reputation beyond reputeDTR has a reputation beyond reputeDTR has a reputation beyond reputeDTR has a reputation beyond reputeDTR has a reputation beyond repute
DTR DTR is online now
Class 4 Laser
DTR's Avatar
 
Join Date: Jun 2010
Location: St. Louis MO
Posts: 5,482
Rep Power: 10819
DTR has a reputation beyond reputeDTR has a reputation beyond reputeDTR has a reputation beyond reputeDTR has a reputation beyond reputeDTR has a reputation beyond reputeDTR has a reputation beyond reputeDTR has a reputation beyond reputeDTR has a reputation beyond reputeDTR has a reputation beyond reputeDTR has a reputation beyond reputeDTR has a reputation beyond repute
Default Re: FREE DIY open source BOOST driver!!! Tested & working!!

Quote:
Originally Posted by Wolfman29 View Post
Ah, very nice ^_^

As does my FlexDrive build with my 445 in it... of course, I turned the pot all the way up, so efficiency is certainly lower. In this case, I am drawing about 2.3A at 3.7V and putting out 4.5-4.6V at 1.5A or so.
Also from what I understand results often do differ slightly from the data sheets values when tested in with real world conditions. I am sure RHD could give us an idea what one of them set close to 1A is actually doing in the real world with an actual 445 diode and 4.2V from the power source.


DTR is online now   Reply With Quote







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







Old 02-20-2012, 12:19 AM #178
Wolfman29's Avatar
Class 3B Laser
 
Join Date: Jan 2011
Location: Davis, CA
Posts: 3,828
Rep Power: 227
Wolfman29 has a reputation beyond reputeWolfman29 has a reputation beyond reputeWolfman29 has a reputation beyond reputeWolfman29 has a reputation beyond reputeWolfman29 has a reputation beyond reputeWolfman29 has a reputation beyond reputeWolfman29 has a reputation beyond reputeWolfman29 has a reputation beyond reputeWolfman29 has a reputation beyond reputeWolfman29 has a reputation beyond reputeWolfman29 has a reputation beyond repute
Wolfman29 Wolfman29 is offline
Class 3B Laser
Wolfman29's Avatar
 
Join Date: Jan 2011
Location: Davis, CA
Posts: 3,828
Rep Power: 227
Wolfman29 has a reputation beyond reputeWolfman29 has a reputation beyond reputeWolfman29 has a reputation beyond reputeWolfman29 has a reputation beyond reputeWolfman29 has a reputation beyond reputeWolfman29 has a reputation beyond reputeWolfman29 has a reputation beyond reputeWolfman29 has a reputation beyond reputeWolfman29 has a reputation beyond reputeWolfman29 has a reputation beyond reputeWolfman29 has a reputation beyond repute
Default Re: FREE DIY open source BOOST driver!!! Tested & working!!

Well, yeah. That's assuming "typical" values for the components. Obviously, you could get some that are slightly more or less efficient than normal. But ~88% is a good ballpark range - I am sure we should be getting anywhere from 80-90% efficiency.
Wolfman29 is offline   Reply With Quote
Old 02-20-2012, 12:50 AM #179
rhd's Avatar
rhd rhd is offline
Class 4 Laser
 
Join Date: Dec 2010
Posts: 8,491
Rep Power: 1392
rhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond repute
rhd rhd is offline
Class 4 Laser
rhd's Avatar
 
Join Date: Dec 2010
Posts: 8,491
Rep Power: 1392
rhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond repute
Default Re: FREE DIY open source BOOST driver!!! Tested & working!!

Quote:
Originally Posted by LuxorLasers747 View Post
Well, Itґs not very common to use linear drivers on a LOCs with one cell right? There arent alot of options and it doenst take long for the batt to drop in voltage and not being able to supply what`s needed. I mean people use boost drivers on locs all the time..

I thought you could figure that out right after you made the driver
Regarding Linears:
It's common (for me). You just need a good linear driver, that's all. For example, my Mosquito driver has a dropout of about 0.2 or 0.25V. So even with a Li-Ion at a voltage that represents the bottom of its safe discharge, you've still got enough clearance.

Regarding Boosts:
I'm not sure about "all the time". I can't say that I very often see boost drivers used for REDs. People will often use a buck driver, or the buck functionality of a flexdrive, but I don't see a lot of boosting happening. I mean, with Vfs that are around 2.5V to 3V, what would you be boosting from? Basically 2x AA or AAA cells. That's the only thing I can think of that would be boosted to hit a RED diode's Vf. Not very often do I see 2x Alkaline builds.

Quote:
Originally Posted by DTR View Post
Not bad at all if right. My very loose estimate on the flex puts it @ 81% efficiency.

The 1W 445 modules I build are set to 1040mA and pull 1.3A from the power supply @ 4.2V. So I am figuring (100%/1300)*1050=80.76%
It would be real easy for me to just figure out the efficiency thing. I can hook a driver up to my bench psu, and put a DMM in series with the output and the test load (in current mode), while putting a second DMM in voltage mode across the test load.

TestLoad(A*V) / BenchPSU(A*V) = efficiency
__________________
CURRENT WAVELENGTHS:
405|441|450|467|473|495|505|520|532|556|PGLRG|589|594|632|638|660


SAFETY & IMPORTANT READING (threads authored and contributed to by various members of LPF):
- Federal Aviation Administration - Laser Safety Initiative (link)
- Info release from Laserglow - Default Canadian restrictions on portable lasers (link)
- The Necessity of Safety Goggles (link)

rhd is offline   Reply With Quote
Old 02-20-2012, 01:29 AM #180
tsteele93's Avatar
Class 3R Laser
 
Join Date: Dec 2011
Location: South Cackalackey, USA
Posts: 2,065
Rep Power: 321
tsteele93 has a reputation beyond reputetsteele93 has a reputation beyond reputetsteele93 has a reputation beyond reputetsteele93 has a reputation beyond reputetsteele93 has a reputation beyond reputetsteele93 has a reputation beyond reputetsteele93 has a reputation beyond reputetsteele93 has a reputation beyond reputetsteele93 has a reputation beyond reputetsteele93 has a reputation beyond reputetsteele93 has a reputation beyond repute
tsteele93 tsteele93 is offline
Class 3R Laser
tsteele93's Avatar
 
Join Date: Dec 2011
Location: South Cackalackey, USA
Posts: 2,065
Rep Power: 321
tsteele93 has a reputation beyond reputetsteele93 has a reputation beyond reputetsteele93 has a reputation beyond reputetsteele93 has a reputation beyond reputetsteele93 has a reputation beyond reputetsteele93 has a reputation beyond reputetsteele93 has a reputation beyond reputetsteele93 has a reputation beyond reputetsteele93 has a reputation beyond reputetsteele93 has a reputation beyond reputetsteele93 has a reputation beyond repute
Question Re: FREE DIY open source BOOST driver!!! Tested & working!!

Quote:
Originally Posted by rhd View Post
Regarding Linears:
That's the only thing I can think of that would be boosted to hit a RED diode's Vf. Not very often do I see 2x Alkaline builds.
This is something that I am still confused about. I understand that current is what the diode wants. So we build constant current drivers to supply them with a fixed current.

But how does voltage factor in? I know we basically are limited in our supply voltage to roughly 1.2v-8.4v unless we get real exotic and run three batteries.

If I am understanding correctly, the laser diode doesn't care what the batteries are though, as long as it is seeing enough current to lase?

Something seems off to me there. Am I overlooking something? Does the driver have to have a voltage-out that stays within a certain range, or is it really just current, current, current?
__________________
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

Tom Steele

Why I'm Here

405nm tsteele93 12x build @ 545mW

445nm Survival Laser @ 1.25W - GIFTED
445nm Stainless Steel Monster with H140 diode @1.62A - 2.15W!
450nm rhd single mode @ 190mW

532nm O-like 50 mW pen from Cajun Lasers - small dot, tight beam!
532nm O-like Crown, rated @ 400mW, metered @ ~450mW with AW battery!
532nm O-like Crown rated @ 500mW, not yet tested
532nm RPL-165 @ 204mW
532nm RPL-375 @ 427mW

635nm rhd Lipstick Tube @ ~485+ mW
638nm Fat Boy @ 825mW - custom build

650nm Bolly BL-8006 @ 319mW

Laser Safety and Eye Injury

Last edited by tsteele93; 02-20-2012 at 01:30 AM.
tsteele93 is offline   Reply With Quote
Old 02-20-2012, 01:36 AM #181
benmwv's Avatar
Class 3R Laser
 
Join Date: Sep 2010
Location: wv
Posts: 1,389
Rep Power: 152
benmwv has a reputation beyond reputebenmwv has a reputation beyond reputebenmwv has a reputation beyond reputebenmwv has a reputation beyond reputebenmwv has a reputation beyond reputebenmwv has a reputation beyond reputebenmwv has a reputation beyond reputebenmwv has a reputation beyond reputebenmwv has a reputation beyond reputebenmwv has a reputation beyond reputebenmwv has a reputation beyond repute
benmwv benmwv is offline
Class 3R Laser
benmwv's Avatar
 
Join Date: Sep 2010
Location: wv
Posts: 1,389
Rep Power: 152
benmwv has a reputation beyond reputebenmwv has a reputation beyond reputebenmwv has a reputation beyond reputebenmwv has a reputation beyond reputebenmwv has a reputation beyond reputebenmwv has a reputation beyond reputebenmwv has a reputation beyond reputebenmwv has a reputation beyond reputebenmwv has a reputation beyond reputebenmwv has a reputation beyond reputebenmwv has a reputation beyond repute
Default Re: FREE DIY open source BOOST driver!!! Tested & working!!

The output voltage of a boost driver must be higher than the input voltage or the driver will die.

Also:
The output voltage of a buck driver must be lower than the input voltage.
The output voltage of a Boost-Buck can be higher or lower than the input voltage.
The output voltage of a linear is always lower than the input.
benmwv is offline   Reply With Quote
Old 02-20-2012, 01:38 AM #182
Wolfman29's Avatar
Class 3B Laser
 
Join Date: Jan 2011
Location: Davis, CA
Posts: 3,828
Rep Power: 227
Wolfman29 has a reputation beyond reputeWolfman29 has a reputation beyond reputeWolfman29 has a reputation beyond reputeWolfman29 has a reputation beyond reputeWolfman29 has a reputation beyond reputeWolfman29 has a reputation beyond reputeWolfman29 has a reputation beyond reputeWolfman29 has a reputation beyond reputeWolfman29 has a reputation beyond reputeWolfman29 has a reputation beyond reputeWolfman29 has a reputation beyond repute
Wolfman29 Wolfman29 is offline
Class 3B Laser
Wolfman29's Avatar
 
Join Date: Jan 2011
Location: Davis, CA
Posts: 3,828
Rep Power: 227
Wolfman29 has a reputation beyond reputeWolfman29 has a reputation beyond reputeWolfman29 has a reputation beyond reputeWolfman29 has a reputation beyond reputeWolfman29 has a reputation beyond reputeWolfman29 has a reputation beyond reputeWolfman29 has a reputation beyond reputeWolfman29 has a reputation beyond reputeWolfman29 has a reputation beyond reputeWolfman29 has a reputation beyond reputeWolfman29 has a reputation beyond repute
Default Re: FREE DIY open source BOOST driver!!! Tested & working!!

The thing about laser diodes is that they DO take a voltage. For instance, red diodes typically take between 2.2V and 3.3V, depending on the type. However, if we regulated to that voltage, then A) the power would fluctuate with a given temperature and, more importantly, B) would be much harder to control.

You see, laser diodes follow Ohm's law to a certain point, generally. But, once you hit that point, the voltage starts increasing very slowly compared to the current. So, you could increase current like 200mA and only increase voltage by .05V.

So, current regulators make sure that the CURRENT is constant and that the voltage that the diode sees is whatever voltage it needs in order to meet that current that is being outputted. So, drivers take an input voltage (in a boost driver from a li-ion battery to a 445nm diode), and runs, lets say 1.3A to the diode. Because of the 445nm diode's characteristics, it will probably require 4.4-4.6V at that current. But, when a diode heats up, it will require less voltage per amp, so the output voltage of the driver will decrease but the current will stay the same. This is important because, say, if we were regulating it to output 4.5V because lets assume, on a cold start, it requires 1.5A at that voltage, once the diode heats up, it may only require 4.4V at that voltage. Then, because the current/voltage slope is so high, it will drastically increase the output current in order to meet the 4.5V output, which would probably kill your diode.

Sorry if something there was unclear - I will explain if you have any more questions.
Wolfman29 is offline   Reply With Quote
Old 02-20-2012, 01:45 AM #183
Dave934's Avatar
Member
 
Join Date: Dec 2009
Location: Franklin Nh
Posts: 43
Rep Power: 0
Dave934 will become famous soon enough
Dave934 Dave934 is offline
Member
Dave934's Avatar
 
Join Date: Dec 2009
Location: Franklin Nh
Posts: 43
Rep Power: 0
Dave934 will become famous soon enough
Default Re: FREE DIY open source BOOST driver!!! Tested & working!!

Way to go guys.I like it when people combine brains and talent to work as team to benefit the whole Forum.
DTR when are the H-series diodes going to be available to buy
Dave934 is offline   Reply With Quote
Old 02-20-2012, 02:43 AM #184
rhd's Avatar
rhd rhd is offline
Class 4 Laser
 
Join Date: Dec 2010
Posts: 8,491
Rep Power: 1392
rhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond repute
rhd rhd is offline
Class 4 Laser
rhd's Avatar
 
Join Date: Dec 2010
Posts: 8,491
Rep Power: 1392
rhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond repute
Default Re: FREE DIY open source BOOST driver!!! Tested & working!!

Quote:
Originally Posted by Dave934 View Post
DTR when are the H-series diodes going to be available to buy
DTR - I didn't know you were getting an H-series?

Not withstanding the fact that I've gotten some real gems out of mine, I tend to think that you'd get a few real gems out of an M-series if you just looked as hard as I did with the H.

You really think the H-series is going to yield better diodes?
__________________
CURRENT WAVELENGTHS:
405|441|450|467|473|495|505|520|532|556|PGLRG|589|594|632|638|660


SAFETY & IMPORTANT READING (threads authored and contributed to by various members of LPF):
- Federal Aviation Administration - Laser Safety Initiative (link)
- Info release from Laserglow - Default Canadian restrictions on portable lasers (link)
- The Necessity of Safety Goggles (link)

rhd is offline   Reply With Quote
Old 02-20-2012, 03:00 AM #185
DTR's Avatar
DTR DTR is online now
Class 4 Laser
 
Join Date: Jun 2010
Location: St. Louis MO
Posts: 5,482
Rep Power: 10819
DTR has a reputation beyond reputeDTR has a reputation beyond reputeDTR has a reputation beyond reputeDTR has a reputation beyond reputeDTR has a reputation beyond reputeDTR has a reputation beyond reputeDTR has a reputation beyond reputeDTR has a reputation beyond reputeDTR has a reputation beyond reputeDTR has a reputation beyond reputeDTR has a reputation beyond repute
DTR DTR is online now
Class 4 Laser
DTR's Avatar
 
Join Date: Jun 2010
Location: St. Louis MO
Posts: 5,482
Rep Power: 10819
DTR has a reputation beyond reputeDTR has a reputation beyond reputeDTR has a reputation beyond reputeDTR has a reputation beyond reputeDTR has a reputation beyond reputeDTR has a reputation beyond reputeDTR has a reputation beyond reputeDTR has a reputation beyond reputeDTR has a reputation beyond reputeDTR has a reputation beyond reputeDTR has a reputation beyond repute
Default Re: FREE DIY open source BOOST driver!!! Tested & working!!

Quote:
Originally Posted by rhd View Post
DTR - I didn't know you were getting an H-series?

Not withstanding the fact that I've gotten some real gems out of mine, I tend to think that you'd get a few real gems out of an M-series if you just looked as hard as I did with the H.

You really think the H-series is going to yield better diodes?
I am not. I don't believe they will yeild any better results and the cost would go up so unless someone bins a few of them and they have way better averages than the M140's I will stick with the M140's. Was of those gems a 3W diode.

Last edited by DTR; 02-20-2012 at 03:00 AM.
DTR is online now   Reply With Quote
Old 02-20-2012, 03:14 AM #186
tsteele93's Avatar
Class 3R Laser
 
Join Date: Dec 2011
Location: South Cackalackey, USA
Posts: 2,065
Rep Power: 321
tsteele93 has a reputation beyond reputetsteele93 has a reputation beyond reputetsteele93 has a reputation beyond reputetsteele93 has a reputation beyond reputetsteele93 has a reputation beyond reputetsteele93 has a reputation beyond reputetsteele93 has a reputation beyond reputetsteele93 has a reputation beyond reputetsteele93 has a reputation beyond reputetsteele93 has a reputation beyond reputetsteele93 has a reputation beyond repute
tsteele93 tsteele93 is offline
Class 3R Laser
tsteele93's Avatar
 
Join Date: Dec 2011
Location: South Cackalackey, USA
Posts: 2,065
Rep Power: 321
tsteele93 has a reputation beyond reputetsteele93 has a reputation beyond reputetsteele93 has a reputation beyond reputetsteele93 has a reputation beyond reputetsteele93 has a reputation beyond reputetsteele93 has a reputation beyond reputetsteele93 has a reputation beyond reputetsteele93 has a reputation beyond reputetsteele93 has a reputation beyond reputetsteele93 has a reputation beyond reputetsteele93 has a reputation beyond repute
Default Re: FREE DIY open source BOOST driver!!! Tested & working!!

Quote:
Originally Posted by Wolfman29 View Post
The thing about laser diodes is that they DO take a voltage. For instance, red diodes typically take between 2.2V and 3.3V, depending on the type. However, if we regulated to that voltage, then A) the power would fluctuate with a given temperature and, more importantly, B) would be much harder to control.

You see, laser diodes follow Ohm's law to a certain point, generally. But, once you hit that point, the voltage starts increasing very slowly compared to the current. So, you could increase current like 200mA and only increase voltage by .05V.

So, current regulators make sure that the CURRENT is constant and that the voltage that the diode sees is whatever voltage it needs in order to meet that current that is being outputted. So, drivers take an input voltage (in a boost driver from a li-ion battery to a 445nm diode), and runs, lets say 1.3A to the diode. Because of the 445nm diode's characteristics, it will probably require 4.4-4.6V at that current. But, when a diode heats up, it will require less voltage per amp, so the output voltage of the driver will decrease but the current will stay the same. This is important because, say, if we were regulating it to output 4.5V because lets assume, on a cold start, it requires 1.5A at that voltage, once the diode heats up, it may only require 4.4V at that voltage. Then, because the current/voltage slope is so high, it will drastically increase the output current in order to meet the 4.5V output, which would probably kill your diode.

Sorry if something there was unclear - I will explain if you have any more questions.
This does help. In my mind, I keep wanting to think of the diode as a resistor because it FEELS like we are powering a resistor-like component (in MY mind) and I'm expecting it to follow Ohm's law.

So that leads me to another question... You say that a 445 may require ~4.6v and a red might only need 2.2v - then does each diode have a voltage that it is needing to see? Is there a list or easy way to know what the driver needs to be doing as far as voltage?

I understand that the current needs to be below max for the diode or it will die, and higher currents equal shorter lifespans.

Will a laser driver work for ANY diode as long as the current is right? Or are there drivers specifically for reds and others for blue/violets and others for ir/green?

I know that I could just buy pre made modules and be happy, and I probably will never build or design a driver, bit I really would like to wrap my ahead around this a little better.

Thanks so much for all of you taking the time to do this!

__________________
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

Tom Steele

Why I'm Here

405nm tsteele93 12x build @ 545mW

445nm Survival Laser @ 1.25W - GIFTED
445nm Stainless Steel Monster with H140 diode @1.62A - 2.15W!
450nm rhd single mode @ 190mW

532nm O-like 50 mW pen from Cajun Lasers - small dot, tight beam!
532nm O-like Crown, rated @ 400mW, metered @ ~450mW with AW battery!
532nm O-like Crown rated @ 500mW, not yet tested
532nm RPL-165 @ 204mW
532nm RPL-375 @ 427mW

635nm rhd Lipstick Tube @ ~485+ mW
638nm Fat Boy @ 825mW - custom build

650nm Bolly BL-8006 @ 319mW

Laser Safety and Eye Injury

Last edited by tsteele93; 02-20-2012 at 03:17 AM.
tsteele93 is offline   Reply With Quote
Old 02-20-2012, 05:04 AM #187
Wolfman29's Avatar
Class 3B Laser
 
Join Date: Jan 2011
Location: Davis, CA
Posts: 3,828
Rep Power: 227
Wolfman29 has a reputation beyond reputeWolfman29 has a reputation beyond reputeWolfman29 has a reputation beyond reputeWolfman29 has a reputation beyond reputeWolfman29 has a reputation beyond reputeWolfman29 has a reputation beyond reputeWolfman29 has a reputation beyond reputeWolfman29 has a reputation beyond reputeWolfman29 has a reputation beyond reputeWolfman29 has a reputation beyond reputeWolfman29 has a reputation beyond repute
Wolfman29 Wolfman29 is offline
Class 3B Laser
Wolfman29's Avatar
 
Join Date: Jan 2011
Location: Davis, CA
Posts: 3,828
Rep Power: 227
Wolfman29 has a reputation beyond reputeWolfman29 has a reputation beyond reputeWolfman29 has a reputation beyond reputeWolfman29 has a reputation beyond reputeWolfman29 has a reputation beyond reputeWolfman29 has a reputation beyond reputeWolfman29 has a reputation beyond reputeWolfman29 has a reputation beyond reputeWolfman29 has a reputation beyond reputeWolfman29 has a reputation beyond reputeWolfman29 has a reputation beyond repute
Default Re: FREE DIY open source BOOST driver!!! Tested & working!!

Typically, IR diodes run slightly below 2V at whatever current they need for operation, red diodes between around 2.5-3.3V, 445nm are generally between 4.4-4.6V (for high current operation) and Blu-ray diodes are typically between 5.5 and 6.5V.

So, that in mind, you need a driver capable of outputting the highest of whatever voltage you need while still sustaining the current output and regulating CURRENT. So, obviously, a red diode will generally always have less voltage than a typical li-ion, so one would use either a low voltage drop linear regulator like the STCS1/2 or the AMC7315 IC or a buck driver, which is much more efficient, typically (buck drivers drop voltage but draw less current from the battery by converting excess voltage into more current). For 445nm diodes, if you are running it from one li-ion battery, you need a boost converter. From two li-ion batteries, you need a buck converter or a linear regulator because they require in the mid-4-volts. For blu-rays, its the same deal - you need a boost converter for 1 li-ion or a buck converter for 2 li-ions. Typically, linear regulators will not work with blu-rays because, even with 8.4V, if you are using an LM1117-based linear regulator, that drops 1V on the regulator and 1.25V on the resistor, so you are already below the 6.5V maximum output voltage necessary. Buck converters, on the other hand, can generally give voltages only .2-.3V less than the input voltage.
Wolfman29 is offline   Reply With Quote
Old 02-23-2012, 11:20 PM #188
rhd's Avatar
rhd rhd is offline
Class 4 Laser
 
Join Date: Dec 2010
Posts: 8,491
Rep Power: 1392
rhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond repute
rhd rhd is offline
Class 4 Laser
rhd's Avatar
 
Join Date: Dec 2010
Posts: 8,491
Rep Power: 1392
rhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond repute
Default Re: FREE DIY open source BOOST driver!!! Tested & working!!

I built something neat. It's like the tiniest 445 I've ever made.

Basically, it uses the world's smallest (supposedly) AAA host. I put in one of these boost drivers, set to, I believe, around 575mW. I didn't know if this would work, so I used an A-series diode. I wish I had used one more efficient. Even still, I'm able to get 250mW+ from a single 10280 cell, using this boost driver.

But that's not what's cool about this video. What's cool about this video is how low the driver will boost from. It basically starts boosting at about 2.2V, and hits regulation at around 3V.

Boost - YouTube

The implication, is that it could probably run from 2x AA cells - at least alkalines, maybe not NiMH.

In terms of stability, as you watch the video, keep in mind that this entire laser build weighs 21 grams (host, lens, diode, module, driver), which is about half as much as a single 18650 battery.

Attached Thumbnails
FREE DIY open source BOOST driver!!! Tested & working!!-weight.jpg  
__________________
CURRENT WAVELENGTHS:
405|441|450|467|473|495|505|520|532|556|PGLRG|589|594|632|638|660


SAFETY & IMPORTANT READING (threads authored and contributed to by various members of LPF):
- Federal Aviation Administration - Laser Safety Initiative (link)
- Info release from Laserglow - Default Canadian restrictions on portable lasers (link)
- The Necessity of Safety Goggles (link)


Last edited by rhd; 02-23-2012 at 11:25 PM.
rhd is offline   Reply With Quote
Old 02-24-2012, 12:00 AM #189
Jubathoph's Avatar
Class 1M Laser
 
Join Date: Jun 2011
Location: Los Angeles
Posts: 115
Rep Power: 21
Jubathoph has much to be proud ofJubathoph has much to be proud ofJubathoph has much to be proud ofJubathoph has much to be proud ofJubathoph has much to be proud ofJubathoph has much to be proud ofJubathoph has much to be proud ofJubathoph has much to be proud ofJubathoph has much to be proud ofJubathoph has much to be proud of
Jubathoph Jubathoph is offline
Class 1M Laser
Jubathoph's Avatar
 
Join Date: Jun 2011
Location: Los Angeles
Posts: 115
Rep Power: 21
Jubathoph has much to be proud ofJubathoph has much to be proud ofJubathoph has much to be proud ofJubathoph has much to be proud ofJubathoph has much to be proud ofJubathoph has much to be proud ofJubathoph has much to be proud ofJubathoph has much to be proud ofJubathoph has much to be proud ofJubathoph has much to be proud of
Default Re: FREE DIY open source BOOST driver!!! Tested & working!!

Quote:
Originally Posted by rhd View Post
I built something neat. It's like the tiniest 445 I've ever made.

Basically, it uses the world's smallest (supposedly) AAA host. I put in one of these boost drivers, set to, I believe, around 575mW. I didn't know if this would work, so I used an A-series diode. I wish I had used one more efficient. Even still, I'm able to get 250mW+ from a single 10280 cell, using this boost driver.

But that's not what's cool about this video. What's cool about this video is how low the driver will boost from. It basically starts boosting at about 2.2V, and hits regulation at around 3V.

Boost - YouTube

The implication, is that it could probably run from 2x AA cells - at least alkalines, maybe not NiMH.

In terms of stability, as you watch the video, keep in mind that this entire laser build weighs 21 grams (host, lens, diode, module, driver), which is about half as much as a single 18650 battery.

[IMG]http://laserpointerforums.com/
attachment.php?attachmentid=36723&stc=1&d=13300431 32[/IMG]
Dude that is awesome. Can you provide a link to that host?
Jubathoph is offline   Reply With Quote
Old 02-24-2012, 12:04 AM #190
lasersbee's Avatar
Class 4 Laser
 
Join Date: Sep 2008
Location: Quebec, Canada
Posts: 15,731
Rep Power: 41315
lasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond repute
lasersbee lasersbee is online now
Class 4 Laser
lasersbee's Avatar
 
Join Date: Sep 2008
Location: Quebec, Canada
Posts: 15,731
Rep Power: 41315
lasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond repute
Default Re: FREE DIY open source BOOST driver!!! Tested & working!!

I can't see what does the weight of the Laser has to do
with this "DIY Open Source" Driver's operating characteristics....

Am I missing something...


Jerry

You can contact us at any time on our Website: J.BAUER Electronics
__________________

J.BAUER Electronics Home Page

LaserBee Laser Power Meter Products meet your needs
at affordable Prices:
See them all here on LPF

LaserBee Power Meter products ALWAYS in Stock
and ready to ship

Also available on eBay:Check availability here..

Subsidary: Pharma Electronic Solutions


This banner is available to and can be copied/used FREE by any LaserBee owner

Last edited by lasersbee; 07-01-2012 at 02:09 PM.
lasersbee is online now   Reply With Quote
Old 02-24-2012, 12:20 AM #191
rhd's Avatar
rhd rhd is offline
Class 4 Laser
 
Join Date: Dec 2010
Posts: 8,491
Rep Power: 1392
rhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond repute
rhd rhd is offline
Class 4 Laser
rhd's Avatar
 
Join Date: Dec 2010
Posts: 8,491
Rep Power: 1392
rhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond repute
Default Re: FREE DIY open source BOOST driver!!! Tested & working!!

Quote:
Originally Posted by lasersbee View Post
I can't see what does the weight of the Laser has to do
with this "DIY Open Source" Driver's operating characteristics....

Am I missing something...

Jerry
Yep, you're missing the fact that laser components (both laser diodes, and drivers) are impacted by heat (Heat - Wikipedia, the free encyclopedia). The ability of a laser diode + driver to function efficiently for a prolonged period of time, depends in large part on the host's ability to conduct heat (Thermal conduction - Wikipedia, the free encyclopedia) away from the components.

Thermal conduction is impacted by mass (Heat transfer - Wikipedia, the free encyclopedia), and the less of it there is, the less heat can be moved away from the components.

Thus, if you see 21 gram laser setup hold a stable output period for 1 minute, this is more impressive than if you see a 28 pound setup with a 14 inch heatsink on the diode and driver, do the same.

Glad I could help walk ya through that!
__________________
CURRENT WAVELENGTHS:
405|441|450|467|473|495|505|520|532|556|PGLRG|589|594|632|638|660


SAFETY & IMPORTANT READING (threads authored and contributed to by various members of LPF):
- Federal Aviation Administration - Laser Safety Initiative (link)
- Info release from Laserglow - Default Canadian restrictions on portable lasers (link)
- The Necessity of Safety Goggles (link)


Last edited by rhd; 02-24-2012 at 12:21 AM.
rhd is offline   Reply With Quote
Old 02-24-2012, 12:29 AM #192
lasersbee's Avatar
Class 4 Laser
 
Join Date: Sep 2008
Location: Quebec, Canada
Posts: 15,731
Rep Power: 41315
lasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond repute
lasersbee lasersbee is online now
Class 4 Laser
lasersbee's Avatar
 
Join Date: Sep 2008
Location: Quebec, Canada
Posts: 15,731
Rep Power: 41315
lasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond repute
Default Re: FREE DIY open source BOOST driver!!! Tested & working!!

The total weight of a Laser has nothing to do with the
heat dissipating properties of said laser...
One could make a lighter (or same weight) Plastic Host
Laser and the heat dissipating properties would be atrocious...
Pure weight means absolutely nothing... It's all about thermal
dissipation...(getting rid of the LDs's and Driver's Heat)


Jerry

You can contact us at any time on our Website: J.BAUER Electronics
__________________

J.BAUER Electronics Home Page

LaserBee Laser Power Meter Products meet your needs
at affordable Prices:
See them all here on LPF

LaserBee Power Meter products ALWAYS in Stock
and ready to ship

Also available on eBay:Check availability here..

Subsidary: Pharma Electronic Solutions


This banner is available to and can be copied/used FREE by any LaserBee owner

Last edited by lasersbee; 07-01-2012 at 02:10 PM.
lasersbee is online now   Reply With Quote
Reply

Tags
ben, benboost, boost, diy, driver, free, open, source





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/f67/free-diy-open-source-boost-driver-tested-working-71433.html
Posted By For Type Date
Untitled document This thread Refback 10-11-2016 05:02 PM
Laser PWM using Arduino This thread Refback 08-22-2015 02:23 PM
Курилка - Страница 684 - Hobbi TV This thread Refback 11-14-2013 09:33 AM
Курилка - Page 684 - Hobbi TV This thread Refback 10-30-2013 12:21 AM
Курилка - Page 675 - Hobbi TV This thread Refback 10-13-2013 09:12 PM
Курилка - Страница 675 - Hobbi TV This thread Refback 04-08-2013 06:48 PM
Untitled document This thread Refback 03-24-2013 05:56 PM
Laser Diode Driver for 405nm 445nm Diodes 1 25A | eBay This thread Refback 03-13-2013 08:24 PM
?????-???????? : lm2731.pcb This thread Refback 03-03-2013 08:10 AM
Untitled document This thread Refback 02-21-2013 10:42 PM
Untitled document This thread Refback 02-20-2013 12:31 PM
- 675 - Hobbi TV This thread Refback 10-08-2012 11:37 AM
?????-???????? : nf034g This thread Refback 10-01-2012 05:20 AM
Laser driver with 500mA current This thread Refback 09-03-2012 06:22 PM
FREE DIY open source BOOST driver!!! Tested & working!! - Page 19 - Laser Pointer Forums - Discuss Lasers & Laser Pointers This thread Refback 04-28-2012 01:41 AM
- 684 - Hobbi TV This thread Refback 03-19-2012 10:17 AM
- 676 - Hobbi TV This thread Refback 02-20-2012 07:36 AM










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 09:59 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