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 06-25-2008, 01:39 AM #1
Class 1 Laser
 
Join Date: Jun 2008
Posts: 52
Rep Power: 10
kinesis is on a distinguished road
Send a message via AIM to kinesis
kinesis kinesis is offline
Class 1 Laser
 
Join Date: Jun 2008
Posts: 52
Rep Power: 10
kinesis is on a distinguished road
Send a message via AIM to kinesis
Default how long will

how long will a cr123a battery at 3.0v or a rcr123a battery at 3.x volts power through a lava micro flexdrive? apparently once the power drops below 2.5v it dies.. so im just wondering how long the battery will last before that occurs


kinesis is offline   Reply With Quote







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







Old 06-25-2008, 01:52 AM #2
pseudolobster's Avatar
Class 3R Laser
 
Join Date: Jan 2008
Location: BC, Canada
Posts: 1,734
Rep Power: 153
pseudolobster has a reputation beyond reputepseudolobster has a reputation beyond reputepseudolobster has a reputation beyond reputepseudolobster has a reputation beyond reputepseudolobster has a reputation beyond reputepseudolobster has a reputation beyond reputepseudolobster has a reputation beyond reputepseudolobster has a reputation beyond reputepseudolobster has a reputation beyond reputepseudolobster has a reputation beyond reputepseudolobster has a reputation beyond repute
pseudolobster pseudolobster is offline
Class 3R Laser
pseudolobster's Avatar
 
Join Date: Jan 2008
Location: BC, Canada
Posts: 1,734
Rep Power: 153
pseudolobster has a reputation beyond reputepseudolobster has a reputation beyond reputepseudolobster has a reputation beyond reputepseudolobster has a reputation beyond reputepseudolobster has a reputation beyond reputepseudolobster has a reputation beyond reputepseudolobster has a reputation beyond reputepseudolobster has a reputation beyond reputepseudolobster has a reputation beyond reputepseudolobster has a reputation beyond reputepseudolobster has a reputation beyond repute
Default Re: how long will

it would depend on what diode you're using and what current you're driving it at, as well as the capacity of the batteries.

drlava's drivers are supposedly about 90% efficient, so, say you're running a diode at 300mA, the entire circuit should be drawing 330mA... if you have, say, 1200mAh batteries, it'll run for just under four hours till the battery is "dead"... considering lithium batteries have an exponential voltage dropoff, 2.5v is pretty close to dead.

(of course, this is theoretical, I don't own a flexdrive, or any cr123's, but the math should give you an idea how it's calculated)
__________________
Custom Text
pseudolobster is offline   Reply With Quote
Old 06-25-2008, 01:53 AM #3
Class 1 Laser
 
Join Date: Jun 2008
Posts: 52
Rep Power: 10
kinesis is on a distinguished road
Send a message via AIM to kinesis
kinesis kinesis is offline
Class 1 Laser
 
Join Date: Jun 2008
Posts: 52
Rep Power: 10
kinesis is on a distinguished road
Send a message via AIM to kinesis
Default Re: how long will

blu ray diode
kinesis is offline   Reply With Quote
Old 06-25-2008, 02:06 AM #4
pseudolobster's Avatar
Class 3R Laser
 
Join Date: Jan 2008
Location: BC, Canada
Posts: 1,734
Rep Power: 153
pseudolobster has a reputation beyond reputepseudolobster has a reputation beyond reputepseudolobster has a reputation beyond reputepseudolobster has a reputation beyond reputepseudolobster has a reputation beyond reputepseudolobster has a reputation beyond reputepseudolobster has a reputation beyond reputepseudolobster has a reputation beyond reputepseudolobster has a reputation beyond reputepseudolobster has a reputation beyond reputepseudolobster has a reputation beyond repute
pseudolobster pseudolobster is offline
Class 3R Laser
pseudolobster's Avatar
 
Join Date: Jan 2008
Location: BC, Canada
Posts: 1,734
Rep Power: 153
pseudolobster has a reputation beyond reputepseudolobster has a reputation beyond reputepseudolobster has a reputation beyond reputepseudolobster has a reputation beyond reputepseudolobster has a reputation beyond reputepseudolobster has a reputation beyond reputepseudolobster has a reputation beyond reputepseudolobster has a reputation beyond reputepseudolobster has a reputation beyond reputepseudolobster has a reputation beyond reputepseudolobster has a reputation beyond repute
Default Re: how long will

again, it will depend on the current you're running the diode at, and the capacity of the specific batteries you want to use.

it sounds like it may be a good idea for you to do a bit more reading before you jump into this.

current is measured in amps or milliamps, batteries are rated in milliamp-hours. for example if you are drawing 100ma, and your batteries are 100mah, your batteries will last 1 hour.
bluray diodes are usually run anywhere between 10mA and 200mA, it depends on the diode... tack 10% on to that, which is what the driver draws, and you have a grand total in mA, divide this by the capacity of your batteries, in mAh, and you will have runtime in hours.

of course, these numbers are theoretical and realworld results will be different, you won't know for sure till you hook your multimeter up to the actual functioning circuit and until you know the exact capacity of your batteries.. but yeah, it'll last a while.

do some more reading though... this is all stuff you can learn by reading this forum.
__________________
Custom Text
pseudolobster is offline   Reply With Quote
Old 06-26-2008, 12:23 AM #5
Abray's Avatar
Class 2M Laser
 
Join Date: Nov 2007
Posts: 933
Rep Power: 15
Abray is a jewel in the roughAbray is a jewel in the roughAbray is a jewel in the rough
Send a message via AIM to Abray
Abray Abray is offline
Class 2M Laser
Abray's Avatar
 
Join Date: Nov 2007
Posts: 933
Rep Power: 15
Abray is a jewel in the roughAbray is a jewel in the roughAbray is a jewel in the rough
Send a message via AIM to Abray
Default Re: how long will

wow, I never knew batteries were rated in mah!!! Do batteries generally say on them their rating? or do you have to find a data sheet for that type of battery?
__________________
Proud Colorado School of Mines student
Abray is offline   Reply With Quote
Old 06-28-2008, 08:50 PM #6
Class 1M Laser
 
Join Date: Jun 2008
Posts: 112
Rep Power: 10
50Freestyle is on a distinguished road
50Freestyle 50Freestyle is offline
Class 1M Laser
 
Join Date: Jun 2008
Posts: 112
Rep Power: 10
50Freestyle is on a distinguished road
Default Re: how long will

Quote:
Originally Posted by Abray
wow, I never knew batteries were rated in mah!!! Do batteries generally say on them their rating? or do you have to find a data sheet for that type of battery?
They Normally state thier mAh on the battery but if not, it is stated on the package you buy them in.
50Freestyle is offline   Reply With Quote
Old 06-28-2008, 09:43 PM #7
Class 1 Laser
 
Join Date: May 2008
Posts: 82
Rep Power: 10
motorider826 is on a distinguished road
motorider826 motorider826 is offline
Class 1 Laser
 
Join Date: May 2008
Posts: 82
Rep Power: 10
motorider826 is on a distinguished road
Default Re: how long will

Quote:
Originally Posted by pseudolobster
again, it will depend on the current you're running the diode at, and the capacity of the specific batteries you want to use.

it sounds like it may be a good idea for you to do a bit more reading before you jump into this.

current is measured in amps or milliamps, batteries are rated in milliamp-hours. for example if you are drawing 100ma, and your batteries are 100mah, your batteries will last 1 hour.
bluray diodes are usually run anywhere between 10mA and 200mA, it depends on the diode... tack 10% on to that, which is what the driver draws, and you have a grand total in mA, divide this by the capacity of your batteries, in mAh, and you will have runtime in hours.

of course, these numbers are theoretical and realworld results will be different, you won't know for sure till you hook your multimeter up to the actual functioning circuit and until you know the exact capacity of your batteries.. but yeah, it'll last a while.

do some more reading though... this is all stuff you can learn by reading this forum.
Isn't it the other way around... take the capacity divided by the mA...right? mA per hour/mA the mA cancel out leaving you hours...
motorider826 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 07:37 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