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 > Experiments & Modifications



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



Reply
 
LinkBack Thread Tools Display Modes
Old 02-03-2010, 01:22 AM #1
Class 1 Laser
 
Join Date: Jan 2010
Posts: 84
Rep Power: 10
rockz has a spectacular aura aboutrockz has a spectacular aura aboutrockz has a spectacular aura about
rockz rockz is offline
Class 1 Laser
 
Join Date: Jan 2010
Posts: 84
Rep Power: 10
rockz has a spectacular aura aboutrockz has a spectacular aura aboutrockz has a spectacular aura about
Default My DDL test-driver

I was bored, and had a project box laying around, so I dropped by my local RadioShack and bought the components for a DDL Driver. And, yes I did solder the connections, but I "potted" it with hot glue. The driver consists of two 10 ohm resistors, a 25 ohm pot, a switch, a 100uf cap at 35v, a diode, and a LM317 regulator. The empty hole you see is a mess-up because I mounted the switch too close to the pot, it wouldn't work, so I had to drill a hole further. So now I can have a variable driver to test my diodes with from 50mA to 250mA.
Oh, and if you have those pink post-it notes, they make a green laser dot yellow...pretty cool.


Heres the inside


Heres my messy ping-po...workstation


__________________
Overspec Dealextreme True Green -- 30mW
50mW Mini-Mag Green -- 50mW

PHR labby driven by a 100mA DDL -- 90mW
DX "Dilda" -- "200"mW

A ton of red keychain lasers

Last edited by rockz; 02-03-2010 at 02:00 AM.
rockz is offline   Reply With Quote







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







Old 02-03-2010, 02:03 AM #2
billg519's Avatar
Class 3R Laser
 
Join Date: Feb 2008
Location: London, Ontario, CANADA
Posts: 1,056
Rep Power: 129
billg519 has a reputation beyond reputebillg519 has a reputation beyond reputebillg519 has a reputation beyond reputebillg519 has a reputation beyond reputebillg519 has a reputation beyond reputebillg519 has a reputation beyond reputebillg519 has a reputation beyond reputebillg519 has a reputation beyond reputebillg519 has a reputation beyond reputebillg519 has a reputation beyond reputebillg519 has a reputation beyond repute
billg519 billg519 is offline
Class 3R Laser
billg519's Avatar
 
Join Date: Feb 2008
Location: London, Ontario, CANADA
Posts: 1,056
Rep Power: 129
billg519 has a reputation beyond reputebillg519 has a reputation beyond reputebillg519 has a reputation beyond reputebillg519 has a reputation beyond reputebillg519 has a reputation beyond reputebillg519 has a reputation beyond reputebillg519 has a reputation beyond reputebillg519 has a reputation beyond reputebillg519 has a reputation beyond reputebillg519 has a reputation beyond reputebillg519 has a reputation beyond repute
Default Re: My DDL test-driver

This is indeed a handy and useful project for testing diodes at the bench. You could add a 1 ohm resistor on the LD- connection to allow a DMM set to mV to read the diode current. If your case was a tiny bit bigger, you could have binding posts on it for all connections. You might also want to put a resistor ( 470 - 1k) across that output cap to ensure that it is drained. The output cap has killed many an LD ...
__________________
I have a few lasers ... (62 handhelds, 11 labbies, 7 gas lasers, and 6 LPM's) I need more ... I have lots of goggles too! Eye safety comes first!
billg519 is offline   Reply With Quote
Old 02-03-2010, 02:11 AM #3
Class 1 Laser
 
Join Date: Jan 2010
Posts: 84
Rep Power: 10
rockz has a spectacular aura aboutrockz has a spectacular aura aboutrockz has a spectacular aura about
rockz rockz is offline
Class 1 Laser
 
Join Date: Jan 2010
Posts: 84
Rep Power: 10
rockz has a spectacular aura aboutrockz has a spectacular aura aboutrockz has a spectacular aura about
Default Re: My DDL test-driver

I don't need a resistor, because I can measure current through the leads, with no load. Also, can't I just short the LD+- wires with the switch off to drain the cap?
__________________
Overspec Dealextreme True Green -- 30mW
50mW Mini-Mag Green -- 50mW

PHR labby driven by a 100mA DDL -- 90mW
DX "Dilda" -- "200"mW

A ton of red keychain lasers
rockz 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 09:36 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