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 08-23-2011, 02:12 AM #1
Class 1M Laser
 
Join Date: Jun 2009
Location: Millbrook, AL
Posts: 123
Rep Power: 11
ChukiDori is a jewel in the roughChukiDori is a jewel in the roughChukiDori is a jewel in the rough
ChukiDori ChukiDori is offline
Class 1M Laser
 
Join Date: Jun 2009
Location: Millbrook, AL
Posts: 123
Rep Power: 11
ChukiDori is a jewel in the roughChukiDori is a jewel in the roughChukiDori is a jewel in the rough
Default I really dont understand drivers..

I do. I know enough to be a good consumer and "buy this driver for this diode".

But I really have no idea how they work. Well..Ok I know how they work..but information is so vague and lacking on what you can and cannot do. It seems almost assumed by people with obviously greater electrical knowledge.

So it seems simple enough...use a power source (battery) that gives you the ideal input voltage for the driver...plug it up ..and now plug that into your diode.

But what if I don't want to use batteries..what if I want to plug it into a 12v source. If t he circuit was designed to ..output 900mA at 4.5V to a diode from an input of 7.5V ..then..an input source of say 12V would not scale properly..it will go through the resistors and still be a higher voltage than the diode was designed for.

Or is this all irrelevant..will driver circuits "sort it out". It seems they are just "purpose built" with specific power requirements in mind with no room for flexibility.

Even if I turn the Pot on such a thing to "adjust the current". I can't just assume the output voltage to the diode will remain the same..when the initial voltage is higher than designed.

OR again..will it sort it self out and still give the same output voltage and current just with more heat. because turning the POT also adjusts "both" values by increasing resistance..if one value (input) is uncalibrated , it will continue to be wrong in comparison to the other no matter how much you play with the pot. I could get the right current to a diode..but the voltage would always be wrong or vice versa..



Last edited by ChukiDori; 08-23-2011 at 02:33 AM.
ChukiDori is offline   Reply With Quote







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







Old 08-23-2011, 02:34 AM #2
Jacob32123's Avatar
Class 2M Laser
 
Join Date: Nov 2009
Location: USA
Posts: 766
Rep Power: 178
Jacob32123 has a reputation beyond reputeJacob32123 has a reputation beyond reputeJacob32123 has a reputation beyond reputeJacob32123 has a reputation beyond reputeJacob32123 has a reputation beyond reputeJacob32123 has a reputation beyond reputeJacob32123 has a reputation beyond reputeJacob32123 has a reputation beyond reputeJacob32123 has a reputation beyond reputeJacob32123 has a reputation beyond reputeJacob32123 has a reputation beyond repute
Jacob32123 Jacob32123 is offline
Class 2M Laser
Jacob32123's Avatar
 
Join Date: Nov 2009
Location: USA
Posts: 766
Rep Power: 178
Jacob32123 has a reputation beyond reputeJacob32123 has a reputation beyond reputeJacob32123 has a reputation beyond reputeJacob32123 has a reputation beyond reputeJacob32123 has a reputation beyond reputeJacob32123 has a reputation beyond reputeJacob32123 has a reputation beyond reputeJacob32123 has a reputation beyond reputeJacob32123 has a reputation beyond reputeJacob32123 has a reputation beyond reputeJacob32123 has a reputation beyond repute
Default Re: I really dont understand drivers..

Quote:
Originally Posted by ChukiDori View Post
I do. I know enough to be a good consumer and "buy this driver for this diode".

But I really have no idea how they work. Well..Ok I know how they work..but information is so vague and lacking on what you can and cannot do. It seems almost assumed by people with obviously greater electrical knowledge.

So it seems simple enough...use a power source (battery) that gives you the ideal input voltage for the driver...plug it up ..and now plug that into your diode.

But what if I don't want to use batteries..what if I want to plug it into a 12v source. If t he circuit was designed to ..output 900mA at 4.5V to a diode from an input of 7.5V ..then..an input source of say 12V would not scale properly..it will go through the resistors and still be a higher voltage than the diode was designed for.

Or is this all irrelevant..will driver circuits "sort it out". It seems they are just "purpose built" with specific power requirements in mind with no room for flexibility.

Even if I turn the Pot on such a thing to "adjust the current". I can't just assume the output voltage to the diode will remain the same..when the initial voltage is higher than designed.

OR again..will it sort it self out and still give the same output voltage and current just with more heat...
Drivers use a IC like a LM317 to regulate voltage. You would be correct if they used a voltage divider or a transformer, but with a IC like a LM317 or another voltage regulating IC, the output voltage stays constant up to the IC's max voltage
Jacob32123 is offline   Reply With Quote
Old 08-23-2011, 02:39 AM #3
Class 1M Laser
 
Join Date: Jun 2009
Location: Millbrook, AL
Posts: 123
Rep Power: 11
ChukiDori is a jewel in the roughChukiDori is a jewel in the roughChukiDori is a jewel in the rough
ChukiDori ChukiDori is offline
Class 1M Laser
 
Join Date: Jun 2009
Location: Millbrook, AL
Posts: 123
Rep Power: 11
ChukiDori is a jewel in the roughChukiDori is a jewel in the roughChukiDori is a jewel in the rough
Default Re: I really dont understand drivers..

That makes me feel a little better then..

So then within reason..I can pretty much hook any IC to a driver circuit. (obviously not ..10 amps or something ridiculous for a circuit designed to power a 1A diode) and the driver will make sure the diode gets only what it "needs" ?

Last edited by ChukiDori; 08-23-2011 at 02:40 AM.
ChukiDori is offline   Reply With Quote
Old 08-23-2011, 03:07 AM #4
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: I really dont understand drivers..

This thread might help some: Driver Compilation Thread - All Drivers In Just One Thread!

Wikipedia and google are very good sources. Just search boost driver, buck driver, and linear driver.
Kevlar is offline   Reply With Quote
Old 08-23-2011, 07:49 AM #5
Class 1M Laser
 
Join Date: Jun 2009
Location: Millbrook, AL
Posts: 123
Rep Power: 11
ChukiDori is a jewel in the roughChukiDori is a jewel in the roughChukiDori is a jewel in the rough
ChukiDori ChukiDori is offline
Class 1M Laser
 
Join Date: Jun 2009
Location: Millbrook, AL
Posts: 123
Rep Power: 11
ChukiDori is a jewel in the roughChukiDori is a jewel in the roughChukiDori is a jewel in the rough
Default Re: I really dont understand drivers..

Kk thank you so much . I know searching is my friend but Ive been addicted to researching and searching the last 4 days and I still come up with more questions than answers.

I believe your link has at first glance perhaps shown me the "flex drive" is an item of consideration. Since I am wanting to build a labby.

While im at it how best would you recommend supplying the 12V current to the flexmod N2. Would a 12 volt AC to DC converter that plugs into the wall be sufficient?


This looks nice

http://www.amazon.com/Wagan-Amp-12V-.../dp/B000P7O5DG

12V @ 5 amps so it should be able to almost supply the flex drive at max current (If hobbiest diodes ever decide to accept 5 amps)

Last edited by ChukiDori; 08-23-2011 at 08:00 AM.
ChukiDori is offline   Reply With Quote
Old 08-23-2011, 09:49 AM #6
bobhaha's Avatar
Class 3B Laser
 
Join Date: May 2009
Location: Sydney, Australia
Posts: 3,256
Rep Power: 360
bobhaha has a reputation beyond reputebobhaha has a reputation beyond reputebobhaha has a reputation beyond reputebobhaha has a reputation beyond reputebobhaha has a reputation beyond reputebobhaha has a reputation beyond reputebobhaha has a reputation beyond reputebobhaha has a reputation beyond reputebobhaha has a reputation beyond reputebobhaha has a reputation beyond reputebobhaha has a reputation beyond repute
bobhaha bobhaha is offline
Class 3B Laser
bobhaha's Avatar
 
Join Date: May 2009
Location: Sydney, Australia
Posts: 3,256
Rep Power: 360
bobhaha has a reputation beyond reputebobhaha has a reputation beyond reputebobhaha has a reputation beyond reputebobhaha has a reputation beyond reputebobhaha has a reputation beyond reputebobhaha has a reputation beyond reputebobhaha has a reputation beyond reputebobhaha has a reputation beyond reputebobhaha has a reputation beyond reputebobhaha has a reputation beyond reputebobhaha has a reputation beyond repute
Default Re: I really dont understand drivers..

A pretty good explaintion can be seen here



Just skip to the 7:15 min mark... the rest is just unprofessional jibber jabber... but it shows how the power supply will give you an unstable output... A driver works much the same way as the capacitor in the video which filters out ripples in the output. It also provides a constant current to the diode, so the input voltage can change but the output will always stay constant.

Hope that helped.
__________________
Lasers!
10.6um - >40W CO2 Laser - 25W RF excited CO2 Laser*
685nm - Being built!
660nm - 250mW LOC PowerLight B50 Host - 100mW WL pulsar
635nm - 430mW C6 Host*
632.8nm - Red He-Ne laser ~1mW
593.5nm - Regal 5
542.8nm - Green He-Ne laser ~2.5mW
532nm - 620mW+ lasersman Firedragon III* - 100mW PGL-III-M from JETLASERS* - 70mW Rayfoss Host*
~~~ - 175mW Rayfoss Host - <5mW WL Core - 55mW DinoDirect review laser*

488nm - On the hoist
473nm - 2x CNI lab lasers ~40mW
445nm - 3W Big Boyz Laser - >1.1W Cree C6 Host - 650mW WL Arctic
405nm - 65mW GLP-405 Aquarius host - 160mW 6x Blu-ray MXDL Host
Total: 71,868.5 mW

Goggles!
Laser glow LSG-532-Sport protective eye goggles OD 7+ 190-532nm HIGHLY RECOMMENDED!!
Jetlasers wrap around 190-540nm OD4+ goggles*
Eagle Pair Red OD4+ goggles
Scopeguy20 Blublockers for 405nm lasers!

* indicates a review has been done, on this item.

Check out my How to Build a Selectable Dummy Load Thread!
bobhaha is offline   Reply With Quote
Old 08-23-2011, 11:12 AM #7
Class 1M Laser
 
Join Date: Jun 2009
Location: Millbrook, AL
Posts: 123
Rep Power: 11
ChukiDori is a jewel in the roughChukiDori is a jewel in the roughChukiDori is a jewel in the rough
ChukiDori ChukiDori is offline
Class 1M Laser
 
Join Date: Jun 2009
Location: Millbrook, AL
Posts: 123
Rep Power: 11
ChukiDori is a jewel in the roughChukiDori is a jewel in the roughChukiDori is a jewel in the rough
Default Re: I really dont understand drivers..

Thanks for the video ^_^ it has been helpful knowing that output will be constant.

I was more worried about burning out a driver itself by using a very hot power supply, because until now ive been wondering how I would power a labby build without batteries..and its usually not stated on many websites what the maximum input specs are on the drivers, just an "ideal" voltage. (but the flex drive does) Im more curious about what happens when you supply more input power to a driver circuit that is well beyond the drivers max "output".

Surely there must be a limit at which point the driver simply cannot handle or resist that much current.

If it must resist "more" current, surely there will be more heat until it fails.

Or maybe i need to back up and consider the fact Im mis understanding how electrical systems work entirely. It just occurred to me. Should I think of a power supply as "forcing" current into a device? or should I think of the device, as something that only draws what current it needs (especcially through a driver circuit)

If thats the case...meh

*edit*

Wow that kid is smart

Last edited by ChukiDori; 08-23-2011 at 11:28 AM.
ChukiDori is offline   Reply With Quote
Old 08-23-2011, 01:34 PM #8
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: I really dont understand drivers..

Two basic types of constant current diode driver. There are buck/boost switching drivers and linear. Both regulate current. Voltage is not a known value it changes with the current demands set by the driver.

In very basic terms buck boost suck as the flex drive require a certain voltage range then using a switch they create the proper voltage either lower or higher. They have to follow Ohms law V=IR so if you need to boost voltage you generally need to supply more current than you regulate because they convert current into voltage.

The second type the linear (LM317) can take a voltage range of ~+30V over output. The excess voltage is converted to heat. Current (I) in is very close to Iout but heat can build up if input voltage is to high compared to voltage out. In very simple terms power dissipation (heat) in watts is roughly equal to (Vin-Vout)*Iin. So the greater the difference in voltage the more it will heat. Input voltage must also always be higher than voltage out for linear because it cannot convert current into voltage.

For lab designs you can usually get away with a LM317 with a 12V supply. If you are powering over an amp just get a higher current version of the LM317. Just remember you will need to heat sink it. So isolate the tab from your electronics and use some sort of thermal transfer medium.





So quick write up gotta go back to work.


EDIT just had an idea here

http://en.wikipedia.org/wiki/Linear_regulator

http://en.wikipedia.org/wiki/Switching_regulator

http://en.wikipedia.org/wiki/Heatsink
__________________
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; 08-23-2011 at 01:35 PM.
midias is offline   Reply With Quote
Old 08-23-2011, 02:51 PM #9
Class 1M Laser
 
Join Date: Jun 2009
Location: Millbrook, AL
Posts: 123
Rep Power: 11
ChukiDori is a jewel in the roughChukiDori is a jewel in the roughChukiDori is a jewel in the rough
ChukiDori ChukiDori is offline
Class 1M Laser
 
Join Date: Jun 2009
Location: Millbrook, AL
Posts: 123
Rep Power: 11
ChukiDori is a jewel in the roughChukiDori is a jewel in the roughChukiDori is a jewel in the rough
Default Re: I really dont understand drivers..

Excellent stuff! I now feel much more confident. hope to get some parts together soon .
ChukiDori is offline   Reply With Quote
Old 08-23-2011, 03:22 PM #10
bobhaha's Avatar
Class 3B Laser
 
Join Date: May 2009
Location: Sydney, Australia
Posts: 3,256
Rep Power: 360
bobhaha has a reputation beyond reputebobhaha has a reputation beyond reputebobhaha has a reputation beyond reputebobhaha has a reputation beyond reputebobhaha has a reputation beyond reputebobhaha has a reputation beyond reputebobhaha has a reputation beyond reputebobhaha has a reputation beyond reputebobhaha has a reputation beyond reputebobhaha has a reputation beyond reputebobhaha has a reputation beyond repute
bobhaha bobhaha is offline
Class 3B Laser
bobhaha's Avatar
 
Join Date: May 2009
Location: Sydney, Australia
Posts: 3,256
Rep Power: 360
bobhaha has a reputation beyond reputebobhaha has a reputation beyond reputebobhaha has a reputation beyond reputebobhaha has a reputation beyond reputebobhaha has a reputation beyond reputebobhaha has a reputation beyond reputebobhaha has a reputation beyond reputebobhaha has a reputation beyond reputebobhaha has a reputation beyond reputebobhaha has a reputation beyond reputebobhaha has a reputation beyond repute
Default Re: I really dont understand drivers..

If the power supply is constant voltage ( a battery, bench power supply, wall wart etc..) the load will run at that voltage and only draw the needed current. A constant current power supply (a driver) will supply constant current, but the load will draw as much voltage as it needs.
__________________
Lasers!
10.6um - >40W CO2 Laser - 25W RF excited CO2 Laser*
685nm - Being built!
660nm - 250mW LOC PowerLight B50 Host - 100mW WL pulsar
635nm - 430mW C6 Host*
632.8nm - Red He-Ne laser ~1mW
593.5nm - Regal 5
542.8nm - Green He-Ne laser ~2.5mW
532nm - 620mW+ lasersman Firedragon III* - 100mW PGL-III-M from JETLASERS* - 70mW Rayfoss Host*
~~~ - 175mW Rayfoss Host - <5mW WL Core - 55mW DinoDirect review laser*

488nm - On the hoist
473nm - 2x CNI lab lasers ~40mW
445nm - 3W Big Boyz Laser - >1.1W Cree C6 Host - 650mW WL Arctic
405nm - 65mW GLP-405 Aquarius host - 160mW 6x Blu-ray MXDL Host
Total: 71,868.5 mW

Goggles!
Laser glow LSG-532-Sport protective eye goggles OD 7+ 190-532nm HIGHLY RECOMMENDED!!
Jetlasers wrap around 190-540nm OD4+ goggles*
Eagle Pair Red OD4+ goggles
Scopeguy20 Blublockers for 405nm lasers!

* indicates a review has been done, on this item.

Check out my How to Build a Selectable Dummy Load Thread!
bobhaha is offline   Reply With Quote
Old 08-23-2011, 04:20 PM #11
Ghostchrome's Avatar
Class 3R Laser
 
Join Date: Aug 2011
Location: Southern California
Posts: 1,155
Rep Power: 186
Ghostchrome has a reputation beyond reputeGhostchrome has a reputation beyond reputeGhostchrome has a reputation beyond reputeGhostchrome has a reputation beyond reputeGhostchrome has a reputation beyond reputeGhostchrome has a reputation beyond reputeGhostchrome has a reputation beyond reputeGhostchrome has a reputation beyond reputeGhostchrome has a reputation beyond reputeGhostchrome has a reputation beyond reputeGhostchrome has a reputation beyond repute
Ghostchrome Ghostchrome is offline
Class 3R Laser
Ghostchrome's Avatar
 
Join Date: Aug 2011
Location: Southern California
Posts: 1,155
Rep Power: 186
Ghostchrome has a reputation beyond reputeGhostchrome has a reputation beyond reputeGhostchrome has a reputation beyond reputeGhostchrome has a reputation beyond reputeGhostchrome has a reputation beyond reputeGhostchrome has a reputation beyond reputeGhostchrome has a reputation beyond reputeGhostchrome has a reputation beyond reputeGhostchrome has a reputation beyond reputeGhostchrome has a reputation beyond reputeGhostchrome has a reputation beyond repute
Default Re: I really dont understand drivers..

Kevlar posted this nifty little universal 12V power supply in another thread. Looks pretty cool and might keep your heat down a bit if say, you set it at 7.5V instead of 12V.

I ordered one.
Ghostchrome is offline   Reply With Quote
Old 08-23-2011, 07:17 PM #12
ShortyInCanada's Avatar
Class 2M Laser
 
Join Date: Mar 2011
Location: Beautiful British Columbia
Posts: 617
Rep Power: 552
ShortyInCanada has a reputation beyond reputeShortyInCanada has a reputation beyond reputeShortyInCanada has a reputation beyond reputeShortyInCanada has a reputation beyond reputeShortyInCanada has a reputation beyond reputeShortyInCanada has a reputation beyond reputeShortyInCanada has a reputation beyond reputeShortyInCanada has a reputation beyond reputeShortyInCanada has a reputation beyond reputeShortyInCanada has a reputation beyond reputeShortyInCanada has a reputation beyond repute
ShortyInCanada ShortyInCanada is offline
Class 2M Laser
ShortyInCanada's Avatar
 
Join Date: Mar 2011
Location: Beautiful British Columbia
Posts: 617
Rep Power: 552
ShortyInCanada has a reputation beyond reputeShortyInCanada has a reputation beyond reputeShortyInCanada has a reputation beyond reputeShortyInCanada has a reputation beyond reputeShortyInCanada has a reputation beyond reputeShortyInCanada has a reputation beyond reputeShortyInCanada has a reputation beyond reputeShortyInCanada has a reputation beyond reputeShortyInCanada has a reputation beyond reputeShortyInCanada has a reputation beyond reputeShortyInCanada has a reputation beyond repute
Default Re: I really dont understand drivers..

Some very well worded questioning !
The answers have helped me with a few more details too !
If only all the outside media sources weren't blocked to me here at work. Sometimes It would be nice to see the clips offered. Maybe fixing the home computer is necessary...
ShortyInCanada is offline   Reply With Quote
Old 08-23-2011, 07:21 PM #13
Class 1M Laser
 
Join Date: Jun 2009
Location: Millbrook, AL
Posts: 123
Rep Power: 11
ChukiDori is a jewel in the roughChukiDori is a jewel in the roughChukiDori is a jewel in the rough
ChukiDori ChukiDori is offline
Class 1M Laser
 
Join Date: Jun 2009
Location: Millbrook, AL
Posts: 123
Rep Power: 11
ChukiDori is a jewel in the roughChukiDori is a jewel in the roughChukiDori is a jewel in the rough
Default Re: I really dont understand drivers..

Quote:
Originally Posted by Ghostchrome View Post
Kevlar posted this nifty little universal 12V power supply in another thread. Looks pretty cool and might keep your heat down a bit if say, you set it at 7.5V instead of 12V.

I ordered one.
That looks very nice! and useful too

But it only supplies up to 1A I might want to crank up a 445 diode to 2W ^_^. Just so I can go

"Look at me!! I built a laser ...and it MAKES FIREE" (and twice as fast as 1 watt , which will therefore be more likely to impress highschool chicks)


BINGO!!!!

http://www.radioshack.com/product/in...ductId=3875404

thanks for the earlier suggestion 2.5 A should be more than plenty.

Now how exactly would one go about plugging this up to the driver. I was half expecting to have to strip the adapter wires..and identify the leads and connect them to the circuit terminals. Or are there less drastic ways. Hmm...Without digging up DC adapters...do they even have positive AND negative leads in the wire?? Because if I remember correctly adapters tend to use 2 prongs..the third hole in the wall being the unused ground. I think DC devices generally self ground to the casing or something...or am I dead wrong.

So then assuming I end up with one "hot" wire..but no ground source. Where should the circuit be grounded to. That negative terminal on a driver circuit input must go somewhere im sure.


http://www.powersupplydepot.com/Powe...LY_9600_PS.asp

Or now that I know what the term "bench psu" means. I found this thingie...for twice as much (I only wish it was blaaack)


Last edited by ChukiDori; 08-23-2011 at 07:51 PM.
ChukiDori is offline   Reply With Quote
Old 08-23-2011, 07:53 PM #14
Class 1M Laser
 
Join Date: Jun 2009
Location: Millbrook, AL
Posts: 123
Rep Power: 11
ChukiDori is a jewel in the roughChukiDori is a jewel in the roughChukiDori is a jewel in the rough
ChukiDori ChukiDori is offline
Class 1M Laser
 
Join Date: Jun 2009
Location: Millbrook, AL
Posts: 123
Rep Power: 11
ChukiDori is a jewel in the roughChukiDori is a jewel in the roughChukiDori is a jewel in the rough
Default Re: I really dont understand drivers..

I think I understand now!!!!! just by looking at that bench PSU why these are such a great option.

I could wire permenent leads to my driver circuit with mated DC plugs attached, which means I can just plug the circuit into the PSU whenever needed *shrug*

I mean..this isn't exactly the direction I was planning on going and I might miss out a few "trial and error" learning experiences but for 60$ and a plug and play, tune and set PSU might as well do it right.


This discussion has been immensely helpful. Thank you all ^_^




Might I ALSO add a direct link to the flexmod user manual which I read last night (or was it early this morning..I cant remember). It does such a great job of establishing a procedural based tutorial. A real..tutorial, with like..all the bases covered and little knowledge assumed. for setting up the driver

http://hacylon.case.edu/laser/FlexMo...dP3_Manual.pdf


Last edited by ChukiDori; 08-23-2011 at 08:34 PM.
ChukiDori is offline   Reply With Quote
Old 08-23-2011, 11:11 PM #15
Ghostchrome's Avatar
Class 3R Laser
 
Join Date: Aug 2011
Location: Southern California
Posts: 1,155
Rep Power: 186
Ghostchrome has a reputation beyond reputeGhostchrome has a reputation beyond reputeGhostchrome has a reputation beyond reputeGhostchrome has a reputation beyond reputeGhostchrome has a reputation beyond reputeGhostchrome has a reputation beyond reputeGhostchrome has a reputation beyond reputeGhostchrome has a reputation beyond reputeGhostchrome has a reputation beyond reputeGhostchrome has a reputation beyond reputeGhostchrome has a reputation beyond repute
Ghostchrome Ghostchrome is offline
Class 3R Laser
Ghostchrome's Avatar
 
Join Date: Aug 2011
Location: Southern California
Posts: 1,155
Rep Power: 186
Ghostchrome has a reputation beyond reputeGhostchrome has a reputation beyond reputeGhostchrome has a reputation beyond reputeGhostchrome has a reputation beyond reputeGhostchrome has a reputation beyond reputeGhostchrome has a reputation beyond reputeGhostchrome has a reputation beyond reputeGhostchrome has a reputation beyond reputeGhostchrome has a reputation beyond reputeGhostchrome has a reputation beyond reputeGhostchrome has a reputation beyond repute
Default Re: I really dont understand drivers..

Hey, nice finds. That bench psu looks pretty sweet!
Ghostchrome is offline   Reply With Quote
Old 08-24-2011, 01:35 AM #16
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: I really dont understand drivers..

If you want to build a simple linear current driver, and use the 2.5A wall-wort you linked from Radio Shack, just use a LM350 instead of the LM317. The LM350 can output up to 3A where as the LM317 can only output up to 1.5A

For a simple tutorial on how to build the linear driver I like Rog88's. I think he is still a member here, just not very active. Here is a link to the tutorial on his site:

Laser driver - It can be done

If you want a labby driver, just put it in a project box, heatsink the LM350, and use a 25 Ohm pot, like this: 25 Ohm Rheostat 3 Watt Pot. Then you can put a knob on it to control the current up to 3A.

Just a suggesion

Last edited by Kevlar; 08-24-2011 at 01:36 AM.
Kevlar 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 11:26 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