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 07-10-2014, 05:35 AM #1
dethlore's Avatar
Class 2M Laser
 
Join Date: Apr 2011
Location: Utah
Posts: 596
Rep Power: 82
dethlore has a reputation beyond reputedethlore has a reputation beyond reputedethlore has a reputation beyond reputedethlore has a reputation beyond reputedethlore has a reputation beyond reputedethlore has a reputation beyond reputedethlore has a reputation beyond reputedethlore has a reputation beyond reputedethlore has a reputation beyond reputedethlore has a reputation beyond reputedethlore has a reputation beyond repute
dethlore dethlore is offline
Class 2M Laser
dethlore's Avatar
 
Join Date: Apr 2011
Location: Utah
Posts: 596
Rep Power: 82
dethlore has a reputation beyond reputedethlore has a reputation beyond reputedethlore has a reputation beyond reputedethlore has a reputation beyond reputedethlore has a reputation beyond reputedethlore has a reputation beyond reputedethlore has a reputation beyond reputedethlore has a reputation beyond reputedethlore has a reputation beyond reputedethlore has a reputation beyond reputedethlore has a reputation beyond repute
Default High efficiency high output linear driver - will it work?

Hey I came across this driver setup that has a very very low dropout. Their schematics show it hooked up to a lead acid battery, but based on the diagrams and specs, would this work with two 18650s in series? Could you pull up to 4A with this setup?

The IC regulator
LT1123 - Low Dropout Regulator Driver - Linear Technology

The Power Transistor
MJE1123 Datasheet pdf - PNP LOW DROPOUT TRANSISTOR 4.0 AMPERES 40 VOLTS - Motorola


__________________
[ | | ]--------------------------------------------------
lasers
808nm 20watt - watercooled
20X 650nm Cheapy Home Depot 9led conversion - My first ever build using Rkstr driver.
18X 650nm rifle mounted custom module
- in progress
A140 445nm 1.4W 3-element glass lens | custom Quassimoto host (twin) | home-made LM317 driver | Radiant X4 LPM
A140 445nm 1.0watt custom Quassimoto host(twin) with 445/405 driver
M140 445nm 1.4watt custom everything
M140 445nm 1.4watt custom everything, mounted in walking staff
M140 445nm 1.8watt custom sink/module/driver in Ultrafire 504B with Extension Tube

405nm BluRay Player - Dead <5mw
protection
OEM Laser Systems
DBD Style 34: 190-534nm, 790-1090nm OD7+ 22% VLT
ARG Style 56: 180-532nm OD7+ 48% VLT
Generic
Cheap Chinese for Red Wavelengths
GB Closed for now Click "LASER SHIRTS" to see the latest run!
LASER SHIRTS

OEM Laser Systems Certified Goggles - Protect your eyes!
www.oemlasersystems.com

www.reubart.com
dethlore is offline   Reply With Quote







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







Old 07-10-2014, 01:54 PM #2
WonHungLow's Avatar
Class 2 Laser
 
Join Date: Aug 2008
Location: Dothan, Alabama
Posts: 268
Rep Power: 0
WonHungLow is infamous around these partsWonHungLow is infamous around these parts
Send a message via MSN to WonHungLow
WonHungLow WonHungLow is offline
Class 2 Laser
WonHungLow's Avatar
 
Join Date: Aug 2008
Location: Dothan, Alabama
Posts: 268
Rep Power: 0
WonHungLow is infamous around these partsWonHungLow is infamous around these parts
Send a message via MSN to WonHungLow
Default Re: High efficiency high output linear driver - will it work?

it should depending on the battery's used. i would probably use LiPo battery instead of LiIon for drawing this much current.
if you are planning on using this for a laser driver, it should be mentioned that it is a constant voltage regulator not constant current.
From the datasheet it should have a 0.4V drop. this is in a small TO-92 package for the regulator but the transistor is in a larger TO-220 package.
it should deliver 5V@4A as stated in the datasheet if built according to supplied schematic
WonHungLow is offline   Reply With Quote
Old 07-10-2014, 03:03 PM #3
dethlore's Avatar
Class 2M Laser
 
Join Date: Apr 2011
Location: Utah
Posts: 596
Rep Power: 82
dethlore has a reputation beyond reputedethlore has a reputation beyond reputedethlore has a reputation beyond reputedethlore has a reputation beyond reputedethlore has a reputation beyond reputedethlore has a reputation beyond reputedethlore has a reputation beyond reputedethlore has a reputation beyond reputedethlore has a reputation beyond reputedethlore has a reputation beyond reputedethlore has a reputation beyond repute
dethlore dethlore is offline
Class 2M Laser
dethlore's Avatar
 
Join Date: Apr 2011
Location: Utah
Posts: 596
Rep Power: 82
dethlore has a reputation beyond reputedethlore has a reputation beyond reputedethlore has a reputation beyond reputedethlore has a reputation beyond reputedethlore has a reputation beyond reputedethlore has a reputation beyond reputedethlore has a reputation beyond reputedethlore has a reputation beyond reputedethlore has a reputation beyond reputedethlore has a reputation beyond reputedethlore has a reputation beyond repute
Default Re: High efficiency high output linear driver - will it work?

Thanks for your input Won. This should - in theory - be fine with 18650s if they have 3Ah+ and a 2C discharge rating. I hooked it up this morning and played around with the resistors. Best I could get was 1190mA, so the batteries must be crapping out.

I guess it's all a moot point if it is a voltage regulator though. bummer.

I got a couple of sample regulators and bought 20 power transistors (cause I use these things all the time for other projects anyways), so there's no skin off my back.
__________________
[ | | ]--------------------------------------------------
lasers
808nm 20watt - watercooled
20X 650nm Cheapy Home Depot 9led conversion - My first ever build using Rkstr driver.
18X 650nm rifle mounted custom module
- in progress
A140 445nm 1.4W 3-element glass lens | custom Quassimoto host (twin) | home-made LM317 driver | Radiant X4 LPM
A140 445nm 1.0watt custom Quassimoto host(twin) with 445/405 driver
M140 445nm 1.4watt custom everything
M140 445nm 1.4watt custom everything, mounted in walking staff
M140 445nm 1.8watt custom sink/module/driver in Ultrafire 504B with Extension Tube

405nm BluRay Player - Dead <5mw
protection
OEM Laser Systems
DBD Style 34: 190-534nm, 790-1090nm OD7+ 22% VLT
ARG Style 56: 180-532nm OD7+ 48% VLT
Generic
Cheap Chinese for Red Wavelengths
GB Closed for now Click "LASER SHIRTS" to see the latest run!
LASER SHIRTS

OEM Laser Systems Certified Goggles - Protect your eyes!
www.oemlasersystems.com

www.reubart.com
dethlore is offline   Reply With Quote
Old 07-10-2014, 03:13 PM #4
djQUAN's Avatar
Class 3R Laser
 
Join Date: May 2013
Location: Philippines
Posts: 1,128
Rep Power: 559
djQUAN has a reputation beyond reputedjQUAN has a reputation beyond reputedjQUAN has a reputation beyond reputedjQUAN has a reputation beyond reputedjQUAN has a reputation beyond reputedjQUAN has a reputation beyond reputedjQUAN has a reputation beyond reputedjQUAN has a reputation beyond reputedjQUAN has a reputation beyond reputedjQUAN has a reputation beyond reputedjQUAN has a reputation beyond repute
Send a message via Yahoo to djQUAN
djQUAN djQUAN is offline
Class 3R Laser
djQUAN's Avatar
 
Join Date: May 2013
Location: Philippines
Posts: 1,128
Rep Power: 559
djQUAN has a reputation beyond reputedjQUAN has a reputation beyond reputedjQUAN has a reputation beyond reputedjQUAN has a reputation beyond reputedjQUAN has a reputation beyond reputedjQUAN has a reputation beyond reputedjQUAN has a reputation beyond reputedjQUAN has a reputation beyond reputedjQUAN has a reputation beyond reputedjQUAN has a reputation beyond reputedjQUAN has a reputation beyond repute
Send a message via Yahoo to djQUAN
Default Re: High efficiency high output linear driver - will it work?

It's a constant voltage regulator. It isn't ideal for driving diodes as there doesn't seem to be an easy way to make it go constant current.
djQUAN is offline   Reply With Quote
Reply





Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On











Loading








Green Laser Pointers by Category Blue Laser Pointers by Category Red Laser Pointers by Category
Yellow Laser Pointers by Category Violet Laser Pointers by Category Orange Laser Pointers by Category
Top Laser Pointers by Power - 1 Watt+ Top Laser Pointers by Power - 500mW+ Top Laser Pointers by Power - 250mW+
Laser Pointer Database High Power Laser Pointers Laser Pointer Diodes






Privacy Policy | Advertising Disclaimer | Terms of Use


 


All times are GMT. The time now is 03:42 PM.


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