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 10-02-2010, 08:55 PM #1
kiyoukan's Avatar
Class 3B Laser
 
Join Date: Oct 2009
Location: USA, MI
Posts: 2,558
Rep Power: 63
kiyoukan has a reputation beyond reputekiyoukan has a reputation beyond reputekiyoukan has a reputation beyond reputekiyoukan has a reputation beyond reputekiyoukan has a reputation beyond reputekiyoukan has a reputation beyond reputekiyoukan has a reputation beyond reputekiyoukan has a reputation beyond reputekiyoukan has a reputation beyond reputekiyoukan has a reputation beyond reputekiyoukan has a reputation beyond repute
Send a message via Skype™ to kiyoukan
kiyoukan kiyoukan is offline
Class 3B Laser
kiyoukan's Avatar
 
Join Date: Oct 2009
Location: USA, MI
Posts: 2,558
Rep Power: 63
kiyoukan has a reputation beyond reputekiyoukan has a reputation beyond reputekiyoukan has a reputation beyond reputekiyoukan has a reputation beyond reputekiyoukan has a reputation beyond reputekiyoukan has a reputation beyond reputekiyoukan has a reputation beyond reputekiyoukan has a reputation beyond reputekiyoukan has a reputation beyond reputekiyoukan has a reputation beyond reputekiyoukan has a reputation beyond repute
Send a message via Skype™ to kiyoukan
Default small lm317 driver advice needed

Hello, i have been building lm317 with normal threw hole components but in recent times i want to covert to smd ones.
Here are a list of parts i wanted to use and know if they will work.
All part numbers from digi key

Resistors:
P1.0ECT-ND 1.0 ohm
541-1.3ECT-ND 1.3 ohm
541-2.0ECT-ND 2.0 ohm
P2.4ECT-ND 2.4 ohm
(all are 1/4 can 1/8 be used?)

Capacitors.
PCE3169CT-ND
(Whats the smallest uf cap that can be used?)

Diode
S1ABDICT-ND
(Currently out of stock. can any diode be used?)


LM317TFS-ND
The whole point to these parts is to be able to build the driver small enough to fit into an axis housing.
I am able to get it to fit with regular threw hole but it take a ton of work.
I want to be able to use smd so i can save space while still getting the current and power i need.
Thanks for any advice or sugestions.


__________________
I have lots of lasers.
No point to list.
I have a projector small only 2.5W
I have other toys. What its plain and simple.
kiyoukan is offline   Reply With Quote







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







Old 10-02-2010, 09:38 PM #2
Eudaimonium's Avatar
Class 4 Laser
 
Join Date: Feb 2008
Location: Pitomača, Croatia
Posts: 6,295
Rep Power: 427
Eudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond repute
Send a message via Skype™ to Eudaimonium
Eudaimonium Eudaimonium is offline
Class 4 Laser
Eudaimonium's Avatar
 
Join Date: Feb 2008
Location: Pitomača, Croatia
Posts: 6,295
Rep Power: 427
Eudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond repute
Send a message via Skype™ to Eudaimonium
Default Re: small lm317 driver advice needed

You can throw out the capacitor and the diode for smaller driver.

You can also use LM1117, lower Vdrop, it'll make battery cycle longer in some cases.

Resistors ... preferably greater power.
Here's a really old picture of a driver I made long ago:



There is capacitor bleeder resistor, parralel to the diode. You can omit both the resistor and capacitor.

Notice how through (!) hole resistor is mounted.
__________________
Accepting and
^Click to enter^

The "Where to get laser components" big compilation thread!

Are you new and need help? Instead of starting new threads, shoot me a Personal Message! I'll answer all the beginner's and advanced questions you might have!

Eudaimonium is offline   Reply With Quote
Old 10-02-2010, 09:44 PM #3
kiyoukan's Avatar
Class 3B Laser
 
Join Date: Oct 2009
Location: USA, MI
Posts: 2,558
Rep Power: 63
kiyoukan has a reputation beyond reputekiyoukan has a reputation beyond reputekiyoukan has a reputation beyond reputekiyoukan has a reputation beyond reputekiyoukan has a reputation beyond reputekiyoukan has a reputation beyond reputekiyoukan has a reputation beyond reputekiyoukan has a reputation beyond reputekiyoukan has a reputation beyond reputekiyoukan has a reputation beyond reputekiyoukan has a reputation beyond repute
Send a message via Skype™ to kiyoukan
kiyoukan kiyoukan is offline
Class 3B Laser
kiyoukan's Avatar
 
Join Date: Oct 2009
Location: USA, MI
Posts: 2,558
Rep Power: 63
kiyoukan has a reputation beyond reputekiyoukan has a reputation beyond reputekiyoukan has a reputation beyond reputekiyoukan has a reputation beyond reputekiyoukan has a reputation beyond reputekiyoukan has a reputation beyond reputekiyoukan has a reputation beyond reputekiyoukan has a reputation beyond reputekiyoukan has a reputation beyond reputekiyoukan has a reputation beyond reputekiyoukan has a reputation beyond repute
Send a message via Skype™ to kiyoukan
Default Re: small lm317 driver advice needed

Well i like the LM1117 for a low powered build but i still ned the 317 for my high powered ones.
But you dont need a capacitor? and or a diode?
Then what protects it from reverse current? or is that just the penalty for small space?
__________________
I have lots of lasers.
No point to list.
I have a projector small only 2.5W
I have other toys. What its plain and simple.

Last edited by kiyoukan; 10-03-2010 at 05:54 PM.
kiyoukan is offline   Reply With Quote
Old 10-03-2010, 09:54 AM #4
Rafa's Avatar
Class 2 Laser
 
Join Date: Feb 2010
Location: Madrid, Spain
Posts: 437
Rep Power: 16
Rafa is a splendid one to beholdRafa is a splendid one to beholdRafa is a splendid one to beholdRafa is a splendid one to beholdRafa is a splendid one to beholdRafa is a splendid one to beholdRafa is a splendid one to behold
Send a message via MSN to Rafa
Rafa Rafa is offline
Class 2 Laser
Rafa's Avatar
 
Join Date: Feb 2010
Location: Madrid, Spain
Posts: 437
Rep Power: 16
Rafa is a splendid one to beholdRafa is a splendid one to beholdRafa is a splendid one to beholdRafa is a splendid one to beholdRafa is a splendid one to beholdRafa is a splendid one to beholdRafa is a splendid one to behold
Send a message via MSN to Rafa
Default Re: small lm317 driver advice needed

Quote:
Originally Posted by kiyoukan View Post
Well i like the LM1117 for a low powered build but i still ned the 317 for my high powered ones. <-- This makes no sense at all. LM1117 and LM317 are capable of givin up to 1A so... LM1117 only drops 1V and gets less hot. If you want a radiator go for the LM317.



But you done need a capacitor? and or a diode? what?



Then what protects it from reverse current? or is that just the penalty for small space? <-- The diode is not a must. You can either use it or not.
I edited your post.
__________________
Lasers:
~100mW 405nm from Erdabyz (L) akshakj <- Died once, working again. vid 1 vid 2(repaired)
~980mW 445nm in Ehgemus RPL style host, thanks to MR. DAGUIN vid
~25mW 532nm (potmoded) from DX (dead now, switch died and repair failed...)not moded vid
~50mW 532nm "star cap" style found in the bus. Yeah, lol.
~6mW 635nm diode laser pic 1 pic 2
~250mW 650nm extracted from 20x DVD burner. <- dead vid 1 vid 2
~130mW 650nm extracted from 16X DVD burner. <$15 to make! LPF thread

~100mW 780mn extracted from 52x CD burner. <- dead cremation vid

My Youtube channel
Rafa is offline   Reply With Quote
Old 10-03-2010, 05:56 PM #5
kiyoukan's Avatar
Class 3B Laser
 
Join Date: Oct 2009
Location: USA, MI
Posts: 2,558
Rep Power: 63
kiyoukan has a reputation beyond reputekiyoukan has a reputation beyond reputekiyoukan has a reputation beyond reputekiyoukan has a reputation beyond reputekiyoukan has a reputation beyond reputekiyoukan has a reputation beyond reputekiyoukan has a reputation beyond reputekiyoukan has a reputation beyond reputekiyoukan has a reputation beyond reputekiyoukan has a reputation beyond reputekiyoukan has a reputation beyond repute
Send a message via Skype™ to kiyoukan
kiyoukan kiyoukan is offline
Class 3B Laser
kiyoukan's Avatar
 
Join Date: Oct 2009
Location: USA, MI
Posts: 2,558
Rep Power: 63
kiyoukan has a reputation beyond reputekiyoukan has a reputation beyond reputekiyoukan has a reputation beyond reputekiyoukan has a reputation beyond reputekiyoukan has a reputation beyond reputekiyoukan has a reputation beyond reputekiyoukan has a reputation beyond reputekiyoukan has a reputation beyond reputekiyoukan has a reputation beyond reputekiyoukan has a reputation beyond reputekiyoukan has a reputation beyond repute
Send a message via Skype™ to kiyoukan
Default Re: small lm317 driver advice needed

as far as digi key goes the only LM1117 they have are 800ma.
And thats great for a small build of low power but when i want a 1.4a build i need the 317 but i just wanted to know if those smd components will handle everything.
__________________
I have lots of lasers.
No point to list.
I have a projector small only 2.5W
I have other toys. What its plain and simple.
kiyoukan is offline   Reply With Quote
Old 10-03-2010, 08:07 PM #6
Eudaimonium's Avatar
Class 4 Laser
 
Join Date: Feb 2008
Location: Pitomača, Croatia
Posts: 6,295
Rep Power: 427
Eudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond repute
Send a message via Skype™ to Eudaimonium
Eudaimonium Eudaimonium is offline
Class 4 Laser
Eudaimonium's Avatar
 
Join Date: Feb 2008
Location: Pitomača, Croatia
Posts: 6,295
Rep Power: 427
Eudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond repute
Send a message via Skype™ to Eudaimonium
Default Re: small lm317 driver advice needed

You can use two driver boards in parralel. Also, for 500mA and above, heatsink is needed on LM chip (317 needs bigger heatsink you know).

For 1.4 A, portable build is next to impossible with linear driver. I can only think of 1 W IR or 1W 445nm.

In either way, you're going to need to heatsink the driver. That being said, what's the point of small SMD driver if it's gonna keep a small room warm anyway?
__________________
Accepting and
^Click to enter^

The "Where to get laser components" big compilation thread!

Are you new and need help? Instead of starting new threads, shoot me a Personal Message! I'll answer all the beginner's and advanced questions you might have!

Eudaimonium is offline   Reply With Quote
Old 10-03-2010, 08:38 PM #7
kiyoukan's Avatar
Class 3B Laser
 
Join Date: Oct 2009
Location: USA, MI
Posts: 2,558
Rep Power: 63
kiyoukan has a reputation beyond reputekiyoukan has a reputation beyond reputekiyoukan has a reputation beyond reputekiyoukan has a reputation beyond reputekiyoukan has a reputation beyond reputekiyoukan has a reputation beyond reputekiyoukan has a reputation beyond reputekiyoukan has a reputation beyond reputekiyoukan has a reputation beyond reputekiyoukan has a reputation beyond reputekiyoukan has a reputation beyond repute
Send a message via Skype™ to kiyoukan
kiyoukan kiyoukan is offline
Class 3B Laser
kiyoukan's Avatar
 
Join Date: Oct 2009
Location: USA, MI
Posts: 2,558
Rep Power: 63
kiyoukan has a reputation beyond reputekiyoukan has a reputation beyond reputekiyoukan has a reputation beyond reputekiyoukan has a reputation beyond reputekiyoukan has a reputation beyond reputekiyoukan has a reputation beyond reputekiyoukan has a reputation beyond reputekiyoukan has a reputation beyond reputekiyoukan has a reputation beyond reputekiyoukan has a reputation beyond reputekiyoukan has a reputation beyond repute
Send a message via Skype™ to kiyoukan
Default Re: small lm317 driver advice needed

well i have a design to keep in my new hosts that allows for a huge heat sink 1 5/8 wide by almost 2 1/4 in deep.
I have gotten great results with the 317s and just want to make them smaller. i heat sink the 317s by
making them fit into the 12mm hole but on the back side of the 317 i have a half moon shaped piece on the back and in between them is a thermal isolation pad.
So the driver along with the laser gets pressed into this large heatsink.
but i need to be able to build it with small components.
So am i right in thinking that all of those will still be good to use and get me the protection i need?
This way i can make the heat sink removable and have the driver come with it.
Allowing me to switch it out for different colored lasers.
I just dont want to go and buy 50 smd components only to find out they are too weak to handle the power.
Also a note i can get any driver chip such as the 317 or any other as long as they are made by stmicro for free so i dont care what chip i use or form factor as long as it can work.
Are there any other linear driver chips with similar power but less v drop than the 317?
__________________
I have lots of lasers.
No point to list.
I have a projector small only 2.5W
I have other toys. What its plain and simple.
kiyoukan is offline   Reply With Quote
Old 10-03-2010, 08:43 PM #8
Eudaimonium's Avatar
Class 4 Laser
 
Join Date: Feb 2008
Location: Pitomača, Croatia
Posts: 6,295
Rep Power: 427
Eudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond repute
Send a message via Skype™ to Eudaimonium
Eudaimonium Eudaimonium is offline
Class 4 Laser
Eudaimonium's Avatar
 
Join Date: Feb 2008
Location: Pitomača, Croatia
Posts: 6,295
Rep Power: 427
Eudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond repute
Send a message via Skype™ to Eudaimonium
Default Re: small lm317 driver advice needed

Quote:
Originally Posted by kiyoukan View Post
well i have a design to keep in my new hosts that allows for a huge heat sink 1 5/8 wide by almost 2 1/4 in deep.
I have gotten great results with the 317s and just want to make them smaller. i heat sink the 317s by
making them fit into the 12mm hole but on the back side of the 317 i have a half moon shaped piece on the back and in between them is a thermal isolation pad.
So the driver along with the laser gets pressed into this large heatsink.
but i need to be able to build it with small components.
So am i right in thinking that all of those will still be good to use and get me the protection i need?
This way i can make the heat sink removable and have the driver come with it.
Allowing me to switch it out for different colored lasers.
I just dont want to go and buy 50 smd components only to find out they are too weak to handle the power.
Also a note i can get any driver chip such as the 317 or any other as long as they are made by stmicro for free so i dont care what chip i use or form factor as long as it can work.
Are there any other linear driver chips with similar power but less v drop than the 317?
That's what we're telling you, 1117 has aproximately half Vdrop than 317.

SOT SMD case will only give you 0.8 A , yes. Having two in parralel i solution. Make singlesided board with two ICs one next to eachother so they are both cooled by heatsink you described.
__________________
Accepting and
^Click to enter^

The "Where to get laser components" big compilation thread!

Are you new and need help? Instead of starting new threads, shoot me a Personal Message! I'll answer all the beginner's and advanced questions you might have!

Eudaimonium is offline   Reply With Quote
Old 10-03-2010, 09:28 PM #9
kiyoukan's Avatar
Class 3B Laser
 
Join Date: Oct 2009
Location: USA, MI
Posts: 2,558
Rep Power: 63
kiyoukan has a reputation beyond reputekiyoukan has a reputation beyond reputekiyoukan has a reputation beyond reputekiyoukan has a reputation beyond reputekiyoukan has a reputation beyond reputekiyoukan has a reputation beyond reputekiyoukan has a reputation beyond reputekiyoukan has a reputation beyond reputekiyoukan has a reputation beyond reputekiyoukan has a reputation beyond reputekiyoukan has a reputation beyond repute
Send a message via Skype™ to kiyoukan
kiyoukan kiyoukan is offline
Class 3B Laser
kiyoukan's Avatar
 
Join Date: Oct 2009
Location: USA, MI
Posts: 2,558
Rep Power: 63
kiyoukan has a reputation beyond reputekiyoukan has a reputation beyond reputekiyoukan has a reputation beyond reputekiyoukan has a reputation beyond reputekiyoukan has a reputation beyond reputekiyoukan has a reputation beyond reputekiyoukan has a reputation beyond reputekiyoukan has a reputation beyond reputekiyoukan has a reputation beyond reputekiyoukan has a reputation beyond reputekiyoukan has a reputation beyond repute
Send a message via Skype™ to kiyoukan
Default Re: small lm317 driver advice needed

hmm using 2 lm117 wont using 2 give me the same vdrop?
if not i might just go that route.
So lets say thats the way i want to go.
Do i need 2 resistors for each or can they just be stacked with the same components?
Sorry for some of these seemingly bad questions as i am still learning and this will be my first time 2x a driver.
__________________
I have lots of lasers.
No point to list.
I have a projector small only 2.5W
I have other toys. What its plain and simple.
kiyoukan is offline   Reply With Quote
Old 10-03-2010, 09:58 PM #10
Vaporizer's Avatar
Class 2 Laser
 
Join Date: Aug 2010
Location: Northern Hemisphere(Ohio,USA), Earth
Posts: 382
Rep Power: 25
Vaporizer has a brilliant futureVaporizer has a brilliant futureVaporizer has a brilliant futureVaporizer has a brilliant futureVaporizer has a brilliant futureVaporizer has a brilliant futureVaporizer has a brilliant futureVaporizer has a brilliant futureVaporizer has a brilliant futureVaporizer has a brilliant futureVaporizer has a brilliant future
Vaporizer Vaporizer is offline
Class 2 Laser
Vaporizer's Avatar
 
Join Date: Aug 2010
Location: Northern Hemisphere(Ohio,USA), Earth
Posts: 382
Rep Power: 25
Vaporizer has a brilliant futureVaporizer has a brilliant futureVaporizer has a brilliant futureVaporizer has a brilliant futureVaporizer has a brilliant futureVaporizer has a brilliant futureVaporizer has a brilliant futureVaporizer has a brilliant futureVaporizer has a brilliant futureVaporizer has a brilliant futureVaporizer has a brilliant future
Default Re: small lm317 driver advice needed

Not if they are in parallel. If you have a dual sided PCB with 1 LM1117 on each side, you have the room for a second resistor. Actually even if they are on the same side sharing a common heatsink.
If you are concerned abt the resistors wattage, measure the ma between the LM1117 and the resistor. It's a 1.25v Vref so know the ma's should easily give you the resistor wattage needed.
__________________
Experience is what you get when you didn't get what you wanted.

Helpful Links:
Ohm's Law Calculator
Parallel Resistance Calculator
LM317 Current Calculator
LM317 Voltage Calculator

Building your 1st Laser?
I Want to Build a Laser
First Build Guide
Vaporizer is offline   Reply With Quote
Old 10-04-2010, 10:35 AM #11
Rafa's Avatar
Class 2 Laser
 
Join Date: Feb 2010
Location: Madrid, Spain
Posts: 437
Rep Power: 16
Rafa is a splendid one to beholdRafa is a splendid one to beholdRafa is a splendid one to beholdRafa is a splendid one to beholdRafa is a splendid one to beholdRafa is a splendid one to beholdRafa is a splendid one to behold
Send a message via MSN to Rafa
Rafa Rafa is offline
Class 2 Laser
Rafa's Avatar
 
Join Date: Feb 2010
Location: Madrid, Spain
Posts: 437
Rep Power: 16
Rafa is a splendid one to beholdRafa is a splendid one to beholdRafa is a splendid one to beholdRafa is a splendid one to beholdRafa is a splendid one to beholdRafa is a splendid one to beholdRafa is a splendid one to behold
Send a message via MSN to Rafa
Default Re: small lm317 driver advice needed

Well.... Linear drivers for portable builds just suck. Why don't you get a serious Switching driver?
__________________
Lasers:
~100mW 405nm from Erdabyz (L) akshakj <- Died once, working again. vid 1 vid 2(repaired)
~980mW 445nm in Ehgemus RPL style host, thanks to MR. DAGUIN vid
~25mW 532nm (potmoded) from DX (dead now, switch died and repair failed...)not moded vid
~50mW 532nm "star cap" style found in the bus. Yeah, lol.
~6mW 635nm diode laser pic 1 pic 2
~250mW 650nm extracted from 20x DVD burner. <- dead vid 1 vid 2
~130mW 650nm extracted from 16X DVD burner. <$15 to make! LPF thread

~100mW 780mn extracted from 52x CD burner. <- dead cremation vid

My Youtube channel
Rafa is offline   Reply With Quote
Old 10-04-2010, 12:13 PM #12
Eudaimonium's Avatar
Class 4 Laser
 
Join Date: Feb 2008
Location: Pitomača, Croatia
Posts: 6,295
Rep Power: 427
Eudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond repute
Send a message via Skype™ to Eudaimonium
Eudaimonium Eudaimonium is offline
Class 4 Laser
Eudaimonium's Avatar
 
Join Date: Feb 2008
Location: Pitomača, Croatia
Posts: 6,295
Rep Power: 427
Eudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond repute
Send a message via Skype™ to Eudaimonium
Default Re: small lm317 driver advice needed

Quote:
Originally Posted by Rafa View Post
Well.... Linear drivers for portable builds just suck. Why don't you get a serious Switching driver?
Price, dude.
You can get 25 pieces of LM1117 SMD ICs for $10 shipped on eGay... uhh I mean eBay.

Some people like to build stuff instead of buying it. [Nothing particular towards you, I'm just saying]
__________________
Accepting and
^Click to enter^

The "Where to get laser components" big compilation thread!

Are you new and need help? Instead of starting new threads, shoot me a Personal Message! I'll answer all the beginner's and advanced questions you might have!

Eudaimonium is offline   Reply With Quote
Old 10-04-2010, 01:03 PM #13
Rafa's Avatar
Class 2 Laser
 
Join Date: Feb 2010
Location: Madrid, Spain
Posts: 437
Rep Power: 16
Rafa is a splendid one to beholdRafa is a splendid one to beholdRafa is a splendid one to beholdRafa is a splendid one to beholdRafa is a splendid one to beholdRafa is a splendid one to beholdRafa is a splendid one to behold
Send a message via MSN to Rafa
Rafa Rafa is offline
Class 2 Laser
Rafa's Avatar
 
Join Date: Feb 2010
Location: Madrid, Spain
Posts: 437
Rep Power: 16
Rafa is a splendid one to beholdRafa is a splendid one to beholdRafa is a splendid one to beholdRafa is a splendid one to beholdRafa is a splendid one to beholdRafa is a splendid one to beholdRafa is a splendid one to behold
Send a message via MSN to Rafa
Default Re: small lm317 driver advice needed

I like to build rather than buying.

He can also build a Switching driver of course.
__________________
Lasers:
~100mW 405nm from Erdabyz (L) akshakj <- Died once, working again. vid 1 vid 2(repaired)
~980mW 445nm in Ehgemus RPL style host, thanks to MR. DAGUIN vid
~25mW 532nm (potmoded) from DX (dead now, switch died and repair failed...)not moded vid
~50mW 532nm "star cap" style found in the bus. Yeah, lol.
~6mW 635nm diode laser pic 1 pic 2
~250mW 650nm extracted from 20x DVD burner. <- dead vid 1 vid 2
~130mW 650nm extracted from 16X DVD burner. <$15 to make! LPF thread

~100mW 780mn extracted from 52x CD burner. <- dead cremation vid

My Youtube channel
Rafa is offline   Reply With Quote
Old 10-04-2010, 01:18 PM #14
Vaporizer's Avatar
Class 2 Laser
 
Join Date: Aug 2010
Location: Northern Hemisphere(Ohio,USA), Earth
Posts: 382
Rep Power: 25
Vaporizer has a brilliant futureVaporizer has a brilliant futureVaporizer has a brilliant futureVaporizer has a brilliant futureVaporizer has a brilliant futureVaporizer has a brilliant futureVaporizer has a brilliant futureVaporizer has a brilliant futureVaporizer has a brilliant futureVaporizer has a brilliant futureVaporizer has a brilliant future
Vaporizer Vaporizer is offline
Class 2 Laser
Vaporizer's Avatar
 
Join Date: Aug 2010
Location: Northern Hemisphere(Ohio,USA), Earth
Posts: 382
Rep Power: 25
Vaporizer has a brilliant futureVaporizer has a brilliant futureVaporizer has a brilliant futureVaporizer has a brilliant futureVaporizer has a brilliant futureVaporizer has a brilliant futureVaporizer has a brilliant futureVaporizer has a brilliant futureVaporizer has a brilliant futureVaporizer has a brilliant futureVaporizer has a brilliant future
Default Re: small lm317 driver advice needed

Price and just building it yourself can be major factors.
You can use 4 7135's in parallel in the SOT-89 pkg with a common heatsink. It also comes in a TO-252 pkg too.
http://www.micro-bridge.com/data/ADD/AMC7135.pdf
No problem getting to 1.4A with these. Support parts can be common and are minimal.
DX has all kind of deals on these.

Another option would be to go with an LM337. It can do 1.5A in one pkg with minimal support components. It even has internal thermal overload protection.
http://www.westfloridacomponents.com...337-ONSemi.pdf

Edit: Here is also a 10 pack of the 7135's rated at 1A. You can see the one "open" area. If you strip one 7135 from the other board you have the PCB and the 1.4A you need already built! If you read the comments you'll see where ppl do this as they are all in parallel. I'm sure there is another offer with all 4 7135's in place & bulk.
DealExtreme: $16.58 AMC7135 1050mA Regulated Circuit Board for DIY Flashlights 10-Pack

If you do the DX offers, don't forget to use the forum link so the forum get credit for sales.
__________________
Experience is what you get when you didn't get what you wanted.

Helpful Links:
Ohm's Law Calculator
Parallel Resistance Calculator
LM317 Current Calculator
LM317 Voltage Calculator

Building your 1st Laser?
I Want to Build a Laser
First Build Guide

Last edited by Vaporizer; 10-04-2010 at 02:08 PM.
Vaporizer is offline   Reply With Quote
Old 10-04-2010, 03:09 PM #15
BShanahan14rulz's Avatar
Class 3B Laser
 
Join Date: Dec 2009
Posts: 3,175
Rep Power: 264
BShanahan14rulz has a reputation beyond reputeBShanahan14rulz has a reputation beyond reputeBShanahan14rulz has a reputation beyond reputeBShanahan14rulz has a reputation beyond reputeBShanahan14rulz has a reputation beyond reputeBShanahan14rulz has a reputation beyond reputeBShanahan14rulz has a reputation beyond reputeBShanahan14rulz has a reputation beyond reputeBShanahan14rulz has a reputation beyond reputeBShanahan14rulz has a reputation beyond reputeBShanahan14rulz has a reputation beyond repute
BShanahan14rulz BShanahan14rulz is offline
Class 3B Laser
BShanahan14rulz's Avatar
 
Join Date: Dec 2009
Posts: 3,175
Rep Power: 264
BShanahan14rulz has a reputation beyond reputeBShanahan14rulz has a reputation beyond reputeBShanahan14rulz has a reputation beyond reputeBShanahan14rulz has a reputation beyond reputeBShanahan14rulz has a reputation beyond reputeBShanahan14rulz has a reputation beyond reputeBShanahan14rulz has a reputation beyond reputeBShanahan14rulz has a reputation beyond reputeBShanahan14rulz has a reputation beyond reputeBShanahan14rulz has a reputation beyond reputeBShanahan14rulz has a reputation beyond repute
Default Re: small lm317 driver advice needed

I were gonna say, as long as the Vf isn't too high, you could just use 7135's.

I think your biggest issue with those, though, would be reducing the voltage to the 6V max input of the 7135, if your diode has a high Vf at those currents.

What kind of build are you doing?
BShanahan14rulz is offline   Reply With Quote
Old 10-04-2010, 05:39 PM #16
kiyoukan's Avatar
Class 3B Laser
 
Join Date: Oct 2009
Location: USA, MI
Posts: 2,558
Rep Power: 63
kiyoukan has a reputation beyond reputekiyoukan has a reputation beyond reputekiyoukan has a reputation beyond reputekiyoukan has a reputation beyond reputekiyoukan has a reputation beyond reputekiyoukan has a reputation beyond reputekiyoukan has a reputation beyond reputekiyoukan has a reputation beyond reputekiyoukan has a reputation beyond reputekiyoukan has a reputation beyond reputekiyoukan has a reputation beyond repute
Send a message via Skype™ to kiyoukan
kiyoukan kiyoukan is offline
Class 3B Laser
kiyoukan's Avatar
 
Join Date: Oct 2009
Location: USA, MI
Posts: 2,558
Rep Power: 63
kiyoukan has a reputation beyond reputekiyoukan has a reputation beyond reputekiyoukan has a reputation beyond reputekiyoukan has a reputation beyond reputekiyoukan has a reputation beyond reputekiyoukan has a reputation beyond reputekiyoukan has a reputation beyond reputekiyoukan has a reputation beyond reputekiyoukan has a reputation beyond reputekiyoukan has a reputation beyond reputekiyoukan has a reputation beyond repute
Send a message via Skype™ to kiyoukan
Default Re: small lm317 driver advice needed

okay i like the deal extreme one but i was kinda dead set on using 2 lir123a 3.7v battery's.
Is there any easy way to drop that last bit of volts?
Or should i go for a new battery?
This is a portable build



__________________
I have lots of lasers.
No point to list.
I have a projector small only 2.5W
I have other toys. What its plain and simple.
kiyoukan 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 04:50 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