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 03-01-2008, 08:30 PM #17
IgorT's Avatar
Class 3B Laser
 
Join Date: Oct 2007
Location: Slovenia, EU
Posts: 4,177
Rep Power: 55
IgorT has a reputation beyond reputeIgorT has a reputation beyond reputeIgorT has a reputation beyond reputeIgorT has a reputation beyond reputeIgorT has a reputation beyond reputeIgorT has a reputation beyond reputeIgorT has a reputation beyond reputeIgorT has a reputation beyond reputeIgorT has a reputation beyond reputeIgorT has a reputation beyond reputeIgorT has a reputation beyond repute
Send a message via Skype™ to IgorT
IgorT IgorT is offline
Class 3B Laser
IgorT's Avatar
 
Join Date: Oct 2007
Location: Slovenia, EU
Posts: 4,177
Rep Power: 55
IgorT has a reputation beyond reputeIgorT has a reputation beyond reputeIgorT has a reputation beyond reputeIgorT has a reputation beyond reputeIgorT has a reputation beyond reputeIgorT has a reputation beyond reputeIgorT has a reputation beyond reputeIgorT has a reputation beyond reputeIgorT has a reputation beyond reputeIgorT has a reputation beyond reputeIgorT has a reputation beyond repute
Send a message via Skype™ to IgorT
Default Re: BLuRay mod #2. *1xAA boost circuit.

Hi chimo!

Since this is a step up circuit, what about the current ripple?

My LM3410 circuit seems to work great, but even tho the red LDs are much sturdier than a blue ray, i'm worried about them.. I built an LC filter just in case... Basically, i have two 47uF tantalums on the circuit output (for the switch on spike), 10uH chokes on the + and the - pole and two ceramic SMD caps directly on the LD, a 1uF and another with more than 20uF (for high frequency ripple)..


I know from experience how much more sensitive the blue rays are, so how did you protect them from this?

Do you think my filter should be sufficient for a red or even a blue ray?


__________________
Signature temporarily out of order...
IgorT is offline   Reply With Quote







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







Old 03-01-2008, 11:34 PM #18
Class 2M Laser
 
Join Date: Jun 2007
Posts: 650
Rep Power: 16
chimo is a jewel in the roughchimo is a jewel in the roughchimo is a jewel in the roughchimo is a jewel in the rough
chimo chimo is offline
Class 2M Laser
 
Join Date: Jun 2007
Posts: 650
Rep Power: 16
chimo is a jewel in the roughchimo is a jewel in the roughchimo is a jewel in the roughchimo is a jewel in the rough
Default Re: BLuRay mod #2. *1xAA boost circuit.

IIRC, in the testing phase I hooked it up on the scope. The ripple didn't look to be a concern. Since LDs are normally pulsed (at least the writing ones), I didn't consider the ripple to be a large factor.

Just checked the data sheet and threw another un-modded charge 2 go unit on the scope with 100, 150 and 470 ohms dummy loads. The loaded ripple voltage was less than 20mV (pretty good). The unloaded ripple voltage was around 200mV.

The max current through the loads was about 38mA and the lowest was 12mA. I solder a small 1uF ceramic cap between the legs of my LDs. In general, you want to use a smaller cap for higher ripple freqs. A cap with a low ESR will be faster to respond.

Paul

Quote:
Originally Posted by IgorT
Hi chimo!

Since this is a step up circuit, what about the current ripple?

My LM3410 circuit seems to work great, but even tho the red LDs are much sturdier than a blue ray, i'm worried about them.. I built an LC filter just in case... Basically, i have two 47uF tantalums on the circuit output (for the switch on spike), 10uH chokes on the + and the - pole and two ceramic SMD caps directly on the LD, a 1uF and another with more than 20uF (for high frequency ripple)..


I know from experience how much more sensitive the blue rays are, so how did you protect them from this?

Do you think my filter should be sufficient for a red or even a blue ray?
chimo is offline   Reply With Quote
Old 03-01-2008, 11:54 PM #19
IgorT's Avatar
Class 3B Laser
 
Join Date: Oct 2007
Location: Slovenia, EU
Posts: 4,177
Rep Power: 55
IgorT has a reputation beyond reputeIgorT has a reputation beyond reputeIgorT has a reputation beyond reputeIgorT has a reputation beyond reputeIgorT has a reputation beyond reputeIgorT has a reputation beyond reputeIgorT has a reputation beyond reputeIgorT has a reputation beyond reputeIgorT has a reputation beyond reputeIgorT has a reputation beyond reputeIgorT has a reputation beyond repute
Send a message via Skype™ to IgorT
IgorT IgorT is offline
Class 3B Laser
IgorT's Avatar
 
Join Date: Oct 2007
Location: Slovenia, EU
Posts: 4,177
Rep Power: 55
IgorT has a reputation beyond reputeIgorT has a reputation beyond reputeIgorT has a reputation beyond reputeIgorT has a reputation beyond reputeIgorT has a reputation beyond reputeIgorT has a reputation beyond reputeIgorT has a reputation beyond reputeIgorT has a reputation beyond reputeIgorT has a reputation beyond reputeIgorT has a reputation beyond reputeIgorT has a reputation beyond repute
Send a message via Skype™ to IgorT
Default Re: BLuRay mod #2. *1xAA boost circuit.

Quote:
Originally Posted by chimo
The max current through the loads was about 38mA and the lowest was 12mA. *I solder a small 1uF ceramic cap between the legs of my LDs. *In general, you want to use a smaller cap for higher ripple freqs. *A cap with a low ESR will be faster to respond.
That's why i have two.. A 1uF and another larger one in parallel directly on the LD.. My engineer said ESR drops if more are soldered in parallel.
Should this be fine? If smaller ones are better, i can put several of 1uF in parallel.


On the other hand, i was thinking about the same thing - the LDs being pulsed for writing anyway.. So maybe this ripple doesn't really matter all that much. Thanks for bringing it up.. I was trying to find something about it in Sam's FAQ, and couldn't.. But now i feel much more confident about the safety of my LDs.


Well, i'm putting it all together tomorow and i'll have the ripple measured at work next week.
If it was suitable for Blue Rays as well, that would be great! I would love having the possibility of powering a BR from only two Ni-MHs or a single Li-Po...
__________________
Signature temporarily out of order...
IgorT is offline   Reply With Quote
Old 03-05-2008, 01:30 PM #20
IgorT's Avatar
Class 3B Laser
 
Join Date: Oct 2007
Location: Slovenia, EU
Posts: 4,177
Rep Power: 55
IgorT has a reputation beyond reputeIgorT has a reputation beyond reputeIgorT has a reputation beyond reputeIgorT has a reputation beyond reputeIgorT has a reputation beyond reputeIgorT has a reputation beyond reputeIgorT has a reputation beyond reputeIgorT has a reputation beyond reputeIgorT has a reputation beyond reputeIgorT has a reputation beyond reputeIgorT has a reputation beyond repute
Send a message via Skype™ to IgorT
IgorT IgorT is offline
Class 3B Laser
IgorT's Avatar
 
Join Date: Oct 2007
Location: Slovenia, EU
Posts: 4,177
Rep Power: 55
IgorT has a reputation beyond reputeIgorT has a reputation beyond reputeIgorT has a reputation beyond reputeIgorT has a reputation beyond reputeIgorT has a reputation beyond reputeIgorT has a reputation beyond reputeIgorT has a reputation beyond reputeIgorT has a reputation beyond reputeIgorT has a reputation beyond reputeIgorT has a reputation beyond reputeIgorT has a reputation beyond repute
Send a message via Skype™ to IgorT
Default Re: BLuRay mod #2. *1xAA boost circuit.

Since we don't know yet, if the cheap DX versions of Charge2Go are also suitable for this, i ordred all three versions, they have available..


Even if they don't work for lasers, they will come in handy for something else.. Besides, just the components are worth more, than what they cost, if i were to buy them here...


The chargers started packaging today, which means i'll have them here before the end of next week.. After i test them, i will post the results.
__________________
Signature temporarily out of order...
IgorT is offline   Reply With Quote
Old 03-05-2008, 02:00 PM #21
Class 2M Laser
 
Join Date: Jun 2007
Posts: 650
Rep Power: 16
chimo is a jewel in the roughchimo is a jewel in the roughchimo is a jewel in the roughchimo is a jewel in the rough
chimo chimo is offline
Class 2M Laser
 
Join Date: Jun 2007
Posts: 650
Rep Power: 16
chimo is a jewel in the roughchimo is a jewel in the roughchimo is a jewel in the roughchimo is a jewel in the rough
Default Re: BLuRay mod #2. *1xAA boost circuit.

Good stuff!

Quote:
Originally Posted by IgorT
Since we don't know yet, if the cheap DX versions of Charge2Go are also suitable for this, i ordred all three versions, they have available..


Even if they don't work for lasers, they will come in handy for something else.. Besides, just the components are worth more, than what they cost, if i were to buy them here...


The chargers started packaging today, which means i'll have them here before the end of next week.. After i test them, i will post the results.
chimo is offline   Reply With Quote
Old 03-05-2008, 02:43 PM #22
IgorT's Avatar
Class 3B Laser
 
Join Date: Oct 2007
Location: Slovenia, EU
Posts: 4,177
Rep Power: 55
IgorT has a reputation beyond reputeIgorT has a reputation beyond reputeIgorT has a reputation beyond reputeIgorT has a reputation beyond reputeIgorT has a reputation beyond reputeIgorT has a reputation beyond reputeIgorT has a reputation beyond reputeIgorT has a reputation beyond reputeIgorT has a reputation beyond reputeIgorT has a reputation beyond reputeIgorT has a reputation beyond repute
Send a message via Skype™ to IgorT
IgorT IgorT is offline
Class 3B Laser
IgorT's Avatar
 
Join Date: Oct 2007
Location: Slovenia, EU
Posts: 4,177
Rep Power: 55
IgorT has a reputation beyond reputeIgorT has a reputation beyond reputeIgorT has a reputation beyond reputeIgorT has a reputation beyond reputeIgorT has a reputation beyond reputeIgorT has a reputation beyond reputeIgorT has a reputation beyond reputeIgorT has a reputation beyond reputeIgorT has a reputation beyond reputeIgorT has a reputation beyond reputeIgorT has a reputation beyond repute
Send a message via Skype™ to IgorT
Default Re: BLuRay mod #2. *1xAA boost circuit.

Quote:
Originally Posted by chimo
Good stuff!
The price difference is quite considerable.. I paid less for the three different chargers, than i would for one original Charge2Go.

So if only one works, it will be worth it.. And it will mean others will only have to pay $6 instead of around $20 for the original..
__________________
Signature temporarily out of order...
IgorT is offline   Reply With Quote
Old 03-06-2008, 01:37 AM #23
Class 2M Laser
 
Join Date: Jun 2007
Posts: 650
Rep Power: 16
chimo is a jewel in the roughchimo is a jewel in the roughchimo is a jewel in the roughchimo is a jewel in the rough
chimo chimo is offline
Class 2M Laser
 
Join Date: Jun 2007
Posts: 650
Rep Power: 16
chimo is a jewel in the roughchimo is a jewel in the roughchimo is a jewel in the roughchimo is a jewel in the rough
Default Re: BLuRay mod #2. *1xAA boost circuit.

I have some news on this one. I knew it was driving that poor little bluray LD very hard. I started noticing the output was getting a little strange so I looked at the LD and noticed that the LDs window was getting burn marks.

I bit the bullet, opened it up, removed the LD and proceeded to convert it to an open can - the best news is that it survived the ordeal!!

I took some macro shots, but I have to wait till my wife is off the computer to post the pigs (I'm sending this from my 32GB iPod Touch - what a neat toy!!!)

Paul
chimo is offline   Reply With Quote
Old 03-06-2008, 01:56 AM #24
Banned
 
Join Date: Dec 2007
Posts: 3,189
Rep Power: 0
jake21 is on a distinguished road
jake21 jake21 is offline
Banned
 
Join Date: Dec 2007
Posts: 3,189
Rep Power: 0
jake21 is on a distinguished road
Default Re: BLuRay mod #2. *1xAA boost circuit.

cool i just bought to off ebay i hope they work out for me
jake21 is offline   Reply With Quote
Old 03-06-2008, 02:16 AM #25
Class 2M Laser
 
Join Date: Jun 2007
Posts: 650
Rep Power: 16
chimo is a jewel in the roughchimo is a jewel in the roughchimo is a jewel in the roughchimo is a jewel in the rough
chimo chimo is offline
Class 2M Laser
 
Join Date: Jun 2007
Posts: 650
Rep Power: 16
chimo is a jewel in the roughchimo is a jewel in the roughchimo is a jewel in the roughchimo is a jewel in the rough
Default Re: BLuRay mod #2. *1xAA boost circuit.

OK here are the pics:

Freshly opened can:




The Business End


Stained Glass Window (note "burned" area)


chimo is offline   Reply With Quote
Old 03-06-2008, 02:31 AM #26
Class 2 Laser
 
Join Date: Nov 2007
Posts: 342
Rep Power: 12
woop will become famous soon enoughwoop will become famous soon enough
woop woop is offline
Class 2 Laser
 
Join Date: Nov 2007
Posts: 342
Rep Power: 12
woop will become famous soon enoughwoop will become famous soon enough
Default Re: BLuRay mod #2.  1xAA boost circuit.

wow. good job opening that thing up.
thats crazy, it burned the window
maybe its cos glass is pretty opaque to the upper end of the light spectrum, towards UV. you would think they would use quartz for the window.
is the power output any diferent now that there is no window?
woop is offline   Reply With Quote
Old 03-06-2008, 02:39 AM #27
drlava's Avatar
Class 3R Laser
 
Join Date: Mar 2007
Posts: 1,152
Rep Power: 71
drlava has a reputation beyond reputedrlava has a reputation beyond reputedrlava has a reputation beyond reputedrlava has a reputation beyond reputedrlava has a reputation beyond reputedrlava has a reputation beyond reputedrlava has a reputation beyond reputedrlava has a reputation beyond reputedrlava has a reputation beyond reputedrlava has a reputation beyond reputedrlava has a reputation beyond repute
Send a message via AIM to drlava
drlava drlava is offline
Class 3R Laser
drlava's Avatar
 
Join Date: Mar 2007
Posts: 1,152
Rep Power: 71
drlava has a reputation beyond reputedrlava has a reputation beyond reputedrlava has a reputation beyond reputedrlava has a reputation beyond reputedrlava has a reputation beyond reputedrlava has a reputation beyond reputedrlava has a reputation beyond reputedrlava has a reputation beyond reputedrlava has a reputation beyond reputedrlava has a reputation beyond reputedrlava has a reputation beyond repute
Send a message via AIM to drlava
Default Re: BLuRay mod #2.  1xAA boost circuit.

or was there crap on the window from before that then burned onto it?
__________________
My Laser Components Site
drlava is offline   Reply With Quote
Old 03-06-2008, 02:42 AM #28
Class 2M Laser
 
Join Date: Jun 2007
Posts: 650
Rep Power: 16
chimo is a jewel in the roughchimo is a jewel in the roughchimo is a jewel in the roughchimo is a jewel in the rough
chimo chimo is offline
Class 2M Laser
 
Join Date: Jun 2007
Posts: 650
Rep Power: 16
chimo is a jewel in the roughchimo is a jewel in the roughchimo is a jewel in the roughchimo is a jewel in the rough
Default Re: BLuRay mod #2. *1xAA boost circuit.

Quote:
Originally Posted by woop
wow. good job opening that thing up.
thats crazy, it burned the window
maybe its cos glass is pretty opaque to the upper end of the light spectrum, towards UV. you would think they would use quartz for the window.
is the power output any diferent now that there is no window?
I threw it on the Coherent thermopile head connected directly to my DMM (I don't have the amp board yet). I got 70-80uV. If it's around 1mW per uV that's about 70-80mW. I know it's being way over-driven. It stings on the skin instantly and will light a match instantly.

BTW, take a close look at the window. It looks to be cut in a hexagon. There looks to be a coating on it as well.
chimo is offline   Reply With Quote
Old 03-06-2008, 02:49 AM #29
Class 2M Laser
 
Join Date: Jun 2007
Posts: 650
Rep Power: 16
chimo is a jewel in the roughchimo is a jewel in the roughchimo is a jewel in the roughchimo is a jewel in the rough
chimo chimo is offline
Class 2M Laser
 
Join Date: Jun 2007
Posts: 650
Rep Power: 16
chimo is a jewel in the roughchimo is a jewel in the roughchimo is a jewel in the roughchimo is a jewel in the rough
Default Re: BLuRay mod #2. *1xAA boost circuit.

Quote:
Originally Posted by drlava
or was there crap on the window from before that then burned onto it?
Here is a little closer pic. *There's a lot of crud on the window from taking it off. *The area to note is inside the highlighted area. *Note the heavy burn marks and the spotted radial array in the darker area.

chimo is offline   Reply With Quote
Old 03-06-2008, 04:12 AM #30
Cereal Eater
 
Join Date: Dec 2007
Location: Argentina
Posts: 6,333
Rep Power: 331
nikokapo has a reputation beyond reputenikokapo has a reputation beyond reputenikokapo has a reputation beyond reputenikokapo has a reputation beyond reputenikokapo has a reputation beyond reputenikokapo has a reputation beyond reputenikokapo has a reputation beyond reputenikokapo has a reputation beyond reputenikokapo has a reputation beyond reputenikokapo has a reputation beyond reputenikokapo has a reputation beyond repute
Send a message via MSN to nikokapo
nikokapo nikokapo is offline
Cereal Eater
 
Join Date: Dec 2007
Location: Argentina
Posts: 6,333
Rep Power: 331
nikokapo has a reputation beyond reputenikokapo has a reputation beyond reputenikokapo has a reputation beyond reputenikokapo has a reputation beyond reputenikokapo has a reputation beyond reputenikokapo has a reputation beyond reputenikokapo has a reputation beyond reputenikokapo has a reputation beyond reputenikokapo has a reputation beyond reputenikokapo has a reputation beyond reputenikokapo has a reputation beyond repute
Send a message via MSN to nikokapo
Default Re: BLuRay mod #2. *1xAA boost circuit.

wow great job there, keep them coming!
nikokapo is offline   Reply With Quote
Old 03-06-2008, 11:21 PM #31
IgorT's Avatar
Class 3B Laser
 
Join Date: Oct 2007
Location: Slovenia, EU
Posts: 4,177
Rep Power: 55
IgorT has a reputation beyond reputeIgorT has a reputation beyond reputeIgorT has a reputation beyond reputeIgorT has a reputation beyond reputeIgorT has a reputation beyond reputeIgorT has a reputation beyond reputeIgorT has a reputation beyond reputeIgorT has a reputation beyond reputeIgorT has a reputation beyond reputeIgorT has a reputation beyond reputeIgorT has a reputation beyond repute
Send a message via Skype™ to IgorT
IgorT IgorT is offline
Class 3B Laser
IgorT's Avatar
 
Join Date: Oct 2007
Location: Slovenia, EU
Posts: 4,177
Rep Power: 55
IgorT has a reputation beyond reputeIgorT has a reputation beyond reputeIgorT has a reputation beyond reputeIgorT has a reputation beyond reputeIgorT has a reputation beyond reputeIgorT has a reputation beyond reputeIgorT has a reputation beyond reputeIgorT has a reputation beyond reputeIgorT has a reputation beyond reputeIgorT has a reputation beyond reputeIgorT has a reputation beyond repute
Send a message via Skype™ to IgorT
Default Re: BLuRay mod #2. *1xAA boost circuit.

Quote:
Originally Posted by chimo
I threw it on the Coherent thermopile head connected directly to my DMM (I don't have the amp board yet). *I got 70-80uV. *If it's around 1mW per uV that's about 70-80mW. *I know it's being way over-driven. *It stings on the skin instantly and will light a match instantly.
OMG.. You are getting 70-80uV from a reader LD?!?

What is the current? How is this possible at all, without it dying?


I really wonder how long this one will live. Oh, did you also make a measurement with the window still on?
__________________
Signature temporarily out of order...
IgorT is offline   Reply With Quote
Old 03-06-2008, 11:30 PM #32
Class 2M Laser
 
Join Date: Jun 2007
Posts: 650
Rep Power: 16
chimo is a jewel in the roughchimo is a jewel in the roughchimo is a jewel in the roughchimo is a jewel in the rough
chimo chimo is offline
Class 2M Laser
 
Join Date: Jun 2007
Posts: 650
Rep Power: 16
chimo is a jewel in the roughchimo is a jewel in the roughchimo is a jewel in the roughchimo is a jewel in the rough
Default Re: BLuRay mod #2. *1xAA boost circuit.

Quote:
Originally Posted by IgorT
[quote author=chimo link=1199303658/15#27 date=1204774933]I threw it on the Coherent thermopile head connected directly to my DMM (I don't have the amp board yet). *I got 70-80uV. *If it's around 1mW per uV that's about 70-80mW. *I know it's being way over-driven. *It stings on the skin instantly and will light a match instantly.
OMG.. You are getting 70-80uV from a reader LD?!?

What is the current? How is this possible at all, without it dying?


I really wonder how long this one will live. Oh, did you also make a measurement with the window still on?[/quote]

It was about the same. It's surviving by luck and short duty cycles. :
chimo 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 03:38 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