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 05-21-2015, 07:39 AM #1
vk2fro's Avatar
Class 3R Laser
 
Join Date: Nov 2009
Location: Sydney, Australia
Posts: 1,154
Rep Power: 57
vk2fro has a reputation beyond reputevk2fro has a reputation beyond reputevk2fro has a reputation beyond reputevk2fro has a reputation beyond reputevk2fro has a reputation beyond reputevk2fro has a reputation beyond reputevk2fro has a reputation beyond reputevk2fro has a reputation beyond reputevk2fro has a reputation beyond reputevk2fro has a reputation beyond reputevk2fro has a reputation beyond repute
vk2fro vk2fro is offline
Class 3R Laser
vk2fro's Avatar
 
Join Date: Nov 2009
Location: Sydney, Australia
Posts: 1,154
Rep Power: 57
vk2fro has a reputation beyond reputevk2fro has a reputation beyond reputevk2fro has a reputation beyond reputevk2fro has a reputation beyond reputevk2fro has a reputation beyond reputevk2fro has a reputation beyond reputevk2fro has a reputation beyond reputevk2fro has a reputation beyond reputevk2fro has a reputation beyond reputevk2fro has a reputation beyond reputevk2fro has a reputation beyond repute
Default Putting a Flexmod P3 behind an X-Drive

Gday folks

Recently I got one of DTR's great 520nm diodes with a X-Drive behind it (pushing 1.8A). If I power this thing its straight up full power. What I need to do is have a low power aiming beam, then be able to switch to full power after putting my goggles on.

My thoughts were (considering I have a spare flexmod) was to put the flexmod behind the X-Drive, set the idle current to just above the current required to get a low power aiming beam, and the max current to whatever gives the most power out of the module). I havent measured what full power draw is at 7.4 volts, as I dont have my saftey glasses yet (dont trust my wicked laser set, so have some ARG 33's coming from NOIR).

The whole purpose of this is so that I can use the module as a laser engraver with a foot pedal. The other option would be to simply build a two stage supply using LM317's to control the output current (or LM338's from memory for more amps).

I've fired the unit on my variable voltage current limited supply, and found it's threshold current. So would the flexmod have a fit if it was driving a driver instead of a diode?

Thanks for any input.


__________________
Taipan Projector: 3.5-4 W B(445nm)1.5W, G(532nm)1.5W R(637nm)1W DT30 Still building!
All solid state PJ: 1W B(462)400mw G(520)200mw R(638) 400mw DT40W (collecting bits)
Pointers: 1.0 watt "Z-Lase" - 520 nm diode by DTR attached to segelei zmax V5 Vaporizer
Gassers: Omnichrome 643 Multi Line AR/KR+ ION!!!! doing ~190mW Low hours too!
Siemens 3 mw 632nm helium neon
vk2fro is offline   Reply With Quote







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







Old 05-21-2015, 12:17 PM #2
anderp's Avatar
Junior Member
 
Join Date: May 2015
Location: Melbourne, Australia
Posts: 27
Rep Power: 0
anderp is a jewel in the roughanderp is a jewel in the roughanderp is a jewel in the rough
anderp anderp is offline
Junior Member
anderp's Avatar
 
Join Date: May 2015
Location: Melbourne, Australia
Posts: 27
Rep Power: 0
anderp is a jewel in the roughanderp is a jewel in the roughanderp is a jewel in the rough
Default Re: Putting a Flexmod P3 behind an X-Drive

You'd probably want to put in a filtering cap between them, but I can't see why it wouldn't work - they're not switchmode, so the usual shenanigans with daisychaining switchmode supplies won't apply.

Why not just use the modulation input of the flexmod, and power the diode directly from the flexmod, though? it's simple enough to wire the pedal to output say 0.5v (adjustable with a trimmer) when your foot is off it and 5v (max power) when the switch is pressed. The manual seems to imply that it doesn't PWM, so there should be no issue with looking at a lower power beam?

Last edited by anderp; 05-21-2015 at 12:18 PM.
anderp is offline   Reply With Quote
Old 05-22-2015, 01:21 AM #3
Cyparagon's Avatar
Class 4 Laser
 
Join Date: Sep 2007
Location: Wisconsin
Posts: 9,142
Rep Power: 9321
Cyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond repute
Cyparagon Cyparagon is online now
Class 4 Laser
Cyparagon's Avatar
 
Join Date: Sep 2007
Location: Wisconsin
Posts: 9,142
Rep Power: 9321
Cyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond repute
Default Re: Putting a Flexmod P3 behind an X-Drive

That's expensive, larger than necessary, impractical, and possibly hard on the switching driver. Use something smaller like a LDO for the low current, and use a DPST to switch between main driver and aiming driver.
__________________
A problem well stated is a problem half solved.
Cyparagon is online now   Reply With Quote
Old 05-22-2015, 01:42 AM #4
vk2fro's Avatar
Class 3R Laser
 
Join Date: Nov 2009
Location: Sydney, Australia
Posts: 1,154
Rep Power: 57
vk2fro has a reputation beyond reputevk2fro has a reputation beyond reputevk2fro has a reputation beyond reputevk2fro has a reputation beyond reputevk2fro has a reputation beyond reputevk2fro has a reputation beyond reputevk2fro has a reputation beyond reputevk2fro has a reputation beyond reputevk2fro has a reputation beyond reputevk2fro has a reputation beyond reputevk2fro has a reputation beyond repute
vk2fro vk2fro is offline
Class 3R Laser
vk2fro's Avatar
 
Join Date: Nov 2009
Location: Sydney, Australia
Posts: 1,154
Rep Power: 57
vk2fro has a reputation beyond reputevk2fro has a reputation beyond reputevk2fro has a reputation beyond reputevk2fro has a reputation beyond reputevk2fro has a reputation beyond reputevk2fro has a reputation beyond reputevk2fro has a reputation beyond reputevk2fro has a reputation beyond reputevk2fro has a reputation beyond reputevk2fro has a reputation beyond reputevk2fro has a reputation beyond repute
Default Re: Putting a Flexmod P3 behind an X-Drive

I don't like the idea of a switch in the lasers supply (well physically). I don't want to introduce spikes. The whole idea of this is coz I already have the bits at hand. No one wants to take chances with a $370 (AU $500) diode
__________________
Taipan Projector: 3.5-4 W B(445nm)1.5W, G(532nm)1.5W R(637nm)1W DT30 Still building!
All solid state PJ: 1W B(462)400mw G(520)200mw R(638) 400mw DT40W (collecting bits)
Pointers: 1.0 watt "Z-Lase" - 520 nm diode by DTR attached to segelei zmax V5 Vaporizer
Gassers: Omnichrome 643 Multi Line AR/KR+ ION!!!! doing ~190mW Low hours too!
Siemens 3 mw 632nm helium neon
vk2fro is offline   Reply With Quote
Old 05-22-2015, 02:54 AM #5
Cyparagon's Avatar
Class 4 Laser
 
Join Date: Sep 2007
Location: Wisconsin
Posts: 9,142
Rep Power: 9321
Cyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond repute
Cyparagon Cyparagon is online now
Class 4 Laser
Cyparagon's Avatar
 
Join Date: Sep 2007
Location: Wisconsin
Posts: 9,142
Rep Power: 9321
Cyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond repute
Default Re: Putting a Flexmod P3 behind an X-Drive

You put the switch BEFORE the driver, d00d.
__________________
A problem well stated is a problem half solved.
Cyparagon is online now   Reply With Quote
Old 05-24-2015, 06:00 AM #6
vk2fro's Avatar
Class 3R Laser
 
Join Date: Nov 2009
Location: Sydney, Australia
Posts: 1,154
Rep Power: 57
vk2fro has a reputation beyond reputevk2fro has a reputation beyond reputevk2fro has a reputation beyond reputevk2fro has a reputation beyond reputevk2fro has a reputation beyond reputevk2fro has a reputation beyond reputevk2fro has a reputation beyond reputevk2fro has a reputation beyond reputevk2fro has a reputation beyond reputevk2fro has a reputation beyond reputevk2fro has a reputation beyond repute
vk2fro vk2fro is offline
Class 3R Laser
vk2fro's Avatar
 
Join Date: Nov 2009
Location: Sydney, Australia
Posts: 1,154
Rep Power: 57
vk2fro has a reputation beyond reputevk2fro has a reputation beyond reputevk2fro has a reputation beyond reputevk2fro has a reputation beyond reputevk2fro has a reputation beyond reputevk2fro has a reputation beyond reputevk2fro has a reputation beyond reputevk2fro has a reputation beyond reputevk2fro has a reputation beyond reputevk2fro has a reputation beyond reputevk2fro has a reputation beyond repute
Default Re: Putting a Flexmod P3 behind an X-Drive

Totally understand you cyp - cept what I need is an aiming beam - the switch would turn the laser off altogether hence using low current (0V modulation) to have the diode just barely lasing, then punch up to etching power when the switch is closed ..

I'll draw a schematic later and post it up -
__________________
Taipan Projector: 3.5-4 W B(445nm)1.5W, G(532nm)1.5W R(637nm)1W DT30 Still building!
All solid state PJ: 1W B(462)400mw G(520)200mw R(638) 400mw DT40W (collecting bits)
Pointers: 1.0 watt "Z-Lase" - 520 nm diode by DTR attached to segelei zmax V5 Vaporizer
Gassers: Omnichrome 643 Multi Line AR/KR+ ION!!!! doing ~190mW Low hours too!
Siemens 3 mw 632nm helium neon
vk2fro is offline   Reply With Quote
Old 05-24-2015, 05:33 PM #7
Cyparagon's Avatar
Class 4 Laser
 
Join Date: Sep 2007
Location: Wisconsin
Posts: 9,142
Rep Power: 9321
Cyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond repute
Cyparagon Cyparagon is online now
Class 4 Laser
Cyparagon's Avatar
 
Join Date: Sep 2007
Location: Wisconsin
Posts: 9,142
Rep Power: 9321
Cyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond repute
Default Re: Putting a Flexmod P3 behind an X-Drive

Quote:
Originally Posted by vk2fro View Post
Totally understand you cyp
No, you don't. Not even in the slightest. Here, maybe this will help.

Attached Thumbnails
Putting a Flexmod P3 behind an X-Drive-hilow.png  
__________________
A problem well stated is a problem half solved.

Last edited by Cyparagon; 05-24-2015 at 05:36 PM.
Cyparagon is online now   Reply With Quote
Old 05-26-2015, 12:00 PM #8
anderp's Avatar
Junior Member
 
Join Date: May 2015
Location: Melbourne, Australia
Posts: 27
Rep Power: 0
anderp is a jewel in the roughanderp is a jewel in the roughanderp is a jewel in the rough
anderp anderp is offline
Junior Member
anderp's Avatar
 
Join Date: May 2015
Location: Melbourne, Australia
Posts: 27
Rep Power: 0
anderp is a jewel in the roughanderp is a jewel in the roughanderp is a jewel in the rough
Default Re: Putting a Flexmod P3 behind an X-Drive

Guys, the flexmod P3 has this functionality already built in with its modulation input!

Noisy contacts switching power between two drivers are completely un-neccessary. You just set the flexmod's maximum current to 1.8 amps, minimum (0 Bias pot) to just barely enough to let the diode lase, remove the X-Drive entirely, and use the modulation input on the flexmod. Your footswitch connects the modulation line to +5v, with a pull-down resistor to hold it at 0v when the switch is off. For added flexibility, the switch could swap in/out a potentiometer instead of +5v, and you've got adjustability for the high-power mode.

Done. No stacking switches, no messy driver changes to alter power levels.

occam's razor; the simplest solution is usually the correct one, and one driver is definitely simpler than two :P
__________________
405nm "1mW" ebay pointer (est. 50mW?) | 405nm BDR-209 SurvivalLasers S4 w/G2 lens | 445nm BitLasers "BitBrew" kit (~1300mW)
462nm M462 Kryton @ 1.7A (~2W) | 532nm "SDLaser.303" chinapointer (est. 80mW?) | 638nm Sanwu Pocket Series (~300mW) | 638nm Oclaro HL63133DG Kryton @ ~300mA
parts inbound for: nothing at the moment. Probably a 520 soon, and maybe a 9mm 445.
I should really buy/build an LPM... | I have several pairs of properly-approved safety goggles, and so should you! | need MOAR WAVELENGTHS

Last edited by anderp; 05-26-2015 at 12:03 PM.
anderp is offline   Reply With Quote
Old 05-26-2015, 08:44 PM #9
Cyparagon's Avatar
Class 4 Laser
 
Join Date: Sep 2007
Location: Wisconsin
Posts: 9,142
Rep Power: 9321
Cyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond repute
Cyparagon Cyparagon is online now
Class 4 Laser
Cyparagon's Avatar
 
Join Date: Sep 2007
Location: Wisconsin
Posts: 9,142
Rep Power: 9321
Cyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond repute
Default Re: Putting a Flexmod P3 behind an X-Drive

Quote:
Originally Posted by anderp View Post
Noisy contacts switching power between two drivers are completely un-neccessary.
All pointers have "noisy contacts", and this is irrelevant because the drivers will filter this out. I'll remind you they are constant current.

You try building a device without any switches and tell me how it goes.

Quote:
Originally Posted by anderp View Post
Your footswitch connects the modulation line to +5v, with a pull-down resistor to hold it at 0v when the switch is off. For added flexibility, the switch could swap in/out a potentiometer
Funny how you complain about the "noise" in switches, then you add switches and pots.

Quote:
Originally Posted by anderp View Post
Guys, the flexmod P3 has this functionality already built in with its modulation input!
Yes, but it's a linear device, and therefore far less efficient than a buck regulator.

Quote:
Originally Posted by anderp View Post
occam's razor; the simplest solution is usually the correct one
LM317 is the simplest solution. That doesn't necessarily make it the correct one. Engineering has more to it than occam's razor.
__________________
A problem well stated is a problem half solved.
Cyparagon is online now   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


LinkBacks (?)
LinkBack to this Thread: http://laserpointerforums.com/f67/putting-flexmod-p3-behind-x-drive-93809.html
Posted By For Type Date
Putting a Flexmod P3 behind an X-Drive This thread Refback 07-28-2015 01:45 PM










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 07:41 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