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.


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


2.5 Watt Blue Thor M 2 Laser Pointer











Go Back   Laser Pointer Forums - Discuss Laser Pointers > Lasers > Drivers, Test-load, Power Supply, & Batteries

List of Laser Pointer Companies (link opens new window)



Reply
 
LinkBack Thread Tools Display Modes
Old 08-04-2016, 01:37 AM #1
Class 1M Laser
 
Join Date: Oct 2011
Posts: 162
Rep Power: 8
flare09 has a spectacular aura aboutflare09 has a spectacular aura aboutflare09 has a spectacular aura about
flare09 flare09 is offline
Class 1M Laser
 
Join Date: Oct 2011
Posts: 162
Rep Power: 8
flare09 has a spectacular aura aboutflare09 has a spectacular aura aboutflare09 has a spectacular aura about
Default Driver questions

Hey everyone, so I'm getting back into my old rgb build, which is great because all the diodes are so cheap now!

So after being scammed years ago, i have been left afloat to diy my own driver, cheaply.

And here's the question.

Is it possible to utilize a simple picaxe with hardware pwm outputs, to drive signal to a pnp transistor, that will be powering drivers, which power individual diodes?

Or is it better to use a ttl enabled driver, and directly provide signal to that? I believe it was the flexmod with the signal pad?

Ill ask about diodes later, but ill need case isolated diodes, in all 3 'colors' RGB


flare09 is offline   Reply With Quote










Old 08-04-2016, 11:13 PM #2
Benm's Avatar
Class 4 Laser
 
Join Date: Aug 2007
Location: Netherlands
Posts: 7,096
Rep Power: 4242
Benm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond repute
Benm Benm is offline
Class 4 Laser
Benm's Avatar
 
Join Date: Aug 2007
Location: Netherlands
Posts: 7,096
Rep Power: 4242
Benm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond repute
Default Re: Driver questions

What kind of control do you want? Analog brightness levels or just TTL on/off control?

If you are building a scanner you really want analog control: that will be moving at 30.000 pps or something similar and any PWM control has to be extremely fast to work within that. If it's just a steady beam you want to vary in color you can use PWM on the TTL input to set brightness levels.
Benm is offline   Reply With Quote
Old 08-05-2016, 02:00 AM #3
Class 1M Laser
 
Join Date: Oct 2011
Posts: 162
Rep Power: 8
flare09 has a spectacular aura aboutflare09 has a spectacular aura aboutflare09 has a spectacular aura about
flare09 flare09 is offline
Class 1M Laser
 
Join Date: Oct 2011
Posts: 162
Rep Power: 8
flare09 has a spectacular aura aboutflare09 has a spectacular aura aboutflare09 has a spectacular aura about
Default Re: Driver questions

I would like intensity control. Its for a simple handheld pointer. And since I'm combining colors, contolling each lasers frequency separately is whats important. Intensity is also important, i would like to be able to drop current output. the frequencies I'm looking for shouldn't be too fast, just your basic point and shoot color changing dot
flare09 is offline   Reply With Quote
Old 08-05-2016, 02:24 PM #4
Benm's Avatar
Class 4 Laser
 
Join Date: Aug 2007
Location: Netherlands
Posts: 7,096
Rep Power: 4242
Benm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond repute
Benm Benm is offline
Class 4 Laser
Benm's Avatar
 
Join Date: Aug 2007
Location: Netherlands
Posts: 7,096
Rep Power: 4242
Benm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond repute
Default Re: Driver questions

A driver with TTL input will work fine for that application. I'm not sure how fast you can generate a pwm signal from the picaxe, but if its over a kHz or so it will work fine.
Benm is offline   Reply With Quote
Old 08-08-2016, 04:53 PM #5
Class 1M Laser
 
Join Date: Oct 2011
Posts: 162
Rep Power: 8
flare09 has a spectacular aura aboutflare09 has a spectacular aura aboutflare09 has a spectacular aura about
flare09 flare09 is offline
Class 1M Laser
 
Join Date: Oct 2011
Posts: 162
Rep Power: 8
flare09 has a spectacular aura aboutflare09 has a spectacular aura aboutflare09 has a spectacular aura about
Default Re: Driver questions

After lookinh around some more i think the best thing would be to go with the sxd drives. Remove the resistor and soft start cap.

I could do some custom trim pots and set a min and max current on each driver, for each diode. That way i can manually adjust output as needed.

Thanks benm
flare09 is offline   Reply With Quote
Old 08-08-2016, 11:32 PM #6
Benm's Avatar
Class 4 Laser
 
Join Date: Aug 2007
Location: Netherlands
Posts: 7,096
Rep Power: 4242
Benm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond repute
Benm Benm is offline
Class 4 Laser
Benm's Avatar
 
Join Date: Aug 2007
Location: Netherlands
Posts: 7,096
Rep Power: 4242
Benm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond repute
Default Re: Driver questions

Sounds like a plan, though i'm not sure what speed that driver can handle modulation/pwm. Not all switchmode supplies are too happy with being turned on and off rapidly, so i'd still connect a test load and look at the output with a scope before connecting any (expensive) laser diode.
Benm is offline   Reply With Quote
Old 08-11-2016, 02:03 PM #7
Alaskan's Avatar
Class 4 Laser
 
Join Date: Jan 2014
Location: Southwest Asia
Posts: 6,243
Rep Power: 9824
Alaskan has a reputation beyond reputeAlaskan has a reputation beyond reputeAlaskan has a reputation beyond reputeAlaskan has a reputation beyond reputeAlaskan has a reputation beyond reputeAlaskan has a reputation beyond reputeAlaskan has a reputation beyond reputeAlaskan has a reputation beyond reputeAlaskan has a reputation beyond reputeAlaskan has a reputation beyond reputeAlaskan has a reputation beyond repute
Alaskan Alaskan is offline
Class 4 Laser
Alaskan's Avatar
 
Join Date: Jan 2014
Location: Southwest Asia
Posts: 6,243
Rep Power: 9824
Alaskan has a reputation beyond reputeAlaskan has a reputation beyond reputeAlaskan has a reputation beyond reputeAlaskan has a reputation beyond reputeAlaskan has a reputation beyond reputeAlaskan has a reputation beyond reputeAlaskan has a reputation beyond reputeAlaskan has a reputation beyond reputeAlaskan has a reputation beyond reputeAlaskan has a reputation beyond reputeAlaskan has a reputation beyond repute
Default Re: Driver questions

I'd like to tag a question on to this thread:

I'm looking for a already built ready to play laser diode driver capable of 1 microsecond pulses with a 50% duty cycle, so; 1us on and 1us off. This would be to drive an IR diode at 780nm, 120-175 milliamps from 2.1 to 2.7VDC. Anyone know where I can find one which is a small size, perhaps no more than 20 x 20mm?
__________________

The forum costs more to run than donations received, if you wish to help click this link: http://laserpointerforums.com/donations.htm

Laser Safety: http://www.laserpointersafety.com/index.html

Sam's Laser FAQ: Sam's Laser FAQ: Welcome Page

RHD's Relative Perceived Brightness Calculator. Compare brightness @nm: http://lsrtools.1apps.com/relativebrightness

To shorten my signature I have moved most of my laser related web links to this forum page, the second post in that thread shows most of my builds... Alaskan's Laser Links: http://laserpointerforums.com/f44/al...ml#post1449395


Sincerely investigate any of these three short quotes as new concepts and you've taken your first step into a larger world:

"I regard consciousness as fundamental. I regard matter as derivative from consciousness..." - Max Planck. "Everything we call real is made of things that cannot be regarded as real" - Neils Bohr. "What we call physical things and events do not exist independently of subjective experience..." - Deepak Chopra.

Each of these three rabbit holes go deep, ending up in the same place.

Useless troll fighting.
Alaskan is offline   Reply With Quote
Reply

Tags
driver, picaxe, pwm





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












Privacy Policy | Advertising Disclaimer | Terms of Use


 


All times are GMT. The time now is 06:33 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