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 06-18-2008, 10:07 PM #33
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: Driver Ideas. DC/DC stepup AND CCregulation

Keep it platonic and all will be well.. :


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







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







Old 06-18-2008, 10:12 PM #34
Class 1M Laser
 
Join Date: Jun 2008
Posts: 232
Rep Power: 10
airy52 is on a distinguished road
Send a message via AIM to airy52
airy52 airy52 is offline
Class 1M Laser
 
Join Date: Jun 2008
Posts: 232
Rep Power: 10
airy52 is on a distinguished road
Send a message via AIM to airy52
Default Re: Driver Ideas. DC/DC stepup AND CCregulation

for sure. Sooooo moving on...... high side amps, or something. Used to allow a negative ground so u can heatsing the diode ( case is negative) I dont understand how to incorporate one into woops schematic, or anything for that matter. or when you cannot ground the case..... or why. anyone know about this?
airy52 is offline   Reply With Quote
Old 06-18-2008, 10:18 PM #35
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: Driver Ideas. DC/DC stepup AND CCregulation

Why you can not ground the case is obvious from the schematic.. There is a resistor (Rsense) between the negative diode connection and battery ground. That resistor means, the diode leg is at a higher potential.

If you ground the diode base, you short the sense resistor, and the current will go up and kill the diode and/or the regulator.

With an op amp or a sensing IC, you can rearrange the circuit, so the diode base is at the ground, and the regulator still gets it's sense voltage from the amplifier.

In a metal host, you usually lose the heatsinking, if you insulate the AixiZ module. And you don't want to do that.
Luckily, this does not matter with PHR diodes, as the case is not connected to the internal parts.
__________________
Signature temporarily out of order...
IgorT is offline   Reply With Quote
Old 06-18-2008, 10:35 PM #36
Class 1M Laser
 
Join Date: Jun 2008
Posts: 232
Rep Power: 10
airy52 is on a distinguished road
Send a message via AIM to airy52
airy52 airy52 is offline
Class 1M Laser
 
Join Date: Jun 2008
Posts: 232
Rep Power: 10
airy52 is on a distinguished road
Send a message via AIM to airy52
Default Re: Driver Ideas. DC/DC stepup AND CCregulation

yeah... if only my order for the tekgems drive had gone through :'( :'( :'(

do you know any examples or schematics where someone has done that with the opamp or sensing ic.?
airy52 is offline   Reply With Quote
Old 06-19-2008, 03:14 AM #37
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: Driver Ideas. DC/DC stepup AND CCregulation

Quote:
Originally Posted by airy52
yeah... if only my order for the tekgems drive had gone through *:'( :'( :'(

do you know any examples or schematics where someone has done that with the opamp or sensing ic.?
I drew a schematic and designed a board for another chip here
http://www.laserpointerforums.com/fo...09911140/24#33
but i never made it.
it would be pretty similar to implement with the TPS61200

to get a general idea of the layout look at the third example in my drawing back on the first page

I just had my last exam (YAY!!!) so i can spend some time creating a board with high side current sensing
woop is offline   Reply With Quote
Old 06-19-2008, 03:25 AM #38
Class 1M Laser
 
Join Date: Jun 2008
Posts: 232
Rep Power: 10
airy52 is on a distinguished road
Send a message via AIM to airy52
airy52 airy52 is offline
Class 1M Laser
 
Join Date: Jun 2008
Posts: 232
Rep Power: 10
airy52 is on a distinguished road
Send a message via AIM to airy52
Default Re: Driver Ideas. DC/DC stepup AND CCregulation

Alright cool. I'm going over it, il post back when i understand it. I'm gonna try to figure it out without asking as many questions as I have. :P Thanks.

PS: dont design a circuit for the maxim yet I want to try to do it myself haha. if you do just dont show me I want it to be a challenge.
airy52 is offline   Reply With Quote
Old 06-19-2008, 05:32 AM #39
Class 1M Laser
 
Join Date: Jun 2008
Posts: 232
Rep Power: 10
airy52 is on a distinguished road
Send a message via AIM to airy52
airy52 airy52 is offline
Class 1M Laser
 
Join Date: Jun 2008
Posts: 232
Rep Power: 10
airy52 is on a distinguished road
Send a message via AIM to airy52
Default Re: Driver Ideas. DC/DC stepup AND CCregulation

I think even if we found a DC DC converter with everything we needed, low Vin Min, >600mA, buck-boost, current regulation through iLED or Ilim, and all that, it would still be just as easy to use the tps chip. I mean the fb is only .3v, its not much. Although with that first maxim chip, one nice thing is that it has two grounds, one for the circuit and one for powering the chip or something like that. So you dont have to worry about that high side amp, just use the different grounds. I think I'm going to run some tests and I'll let you know how it goes. Probably make a new thread with the chip in the title, I'll see what happens when Vin is > than Vout or the V needed. and some efficiency numbers. Just waiting on my chips. Those hardcore coilcraft people said the company i made up was not a real company but we'll see. anyone know a good way to get coilcraft coils? without paying obviousyl? Thanks!
airy52 is offline   Reply With Quote
Old 06-19-2008, 06:36 AM #40
Class 2M Laser
 
Join Date: Sep 2007
Location: The Left Coast
Posts: 835
Rep Power: 17
danq is a glorious beacon of lightdanq is a glorious beacon of lightdanq is a glorious beacon of lightdanq is a glorious beacon of lightdanq is a glorious beacon of light
danq danq is offline
Class 2M Laser
 
Join Date: Sep 2007
Location: The Left Coast
Posts: 835
Rep Power: 17
danq is a glorious beacon of lightdanq is a glorious beacon of lightdanq is a glorious beacon of lightdanq is a glorious beacon of lightdanq is a glorious beacon of light
Default Re: Driver Ideas. DC/DC stepup AND CCregulation

Quote:
Originally Posted by airy52
nyone know a good way to get coilcraft coils? without paying obviousyl? Thanks!
well... I've got to say that the best way for one to get something of value is not through chicanery but by honestly paying for it. It may be obvious, but if everybody keeps trying to con Coilcraft or any other company, they will eventually be forced to either tighten up impossibly or just shut down the samples program altogether - then even honest developers will not be able to get them.

I understand when people really can't afford something. Really, I do - have been very poor in the past and am headed into another spell that may be permanent. But:

The coils are not very expensive. I paid only $6.60 for 30 inductors (10 uH, 1 Amp, 0.066 ohm - Taiyo Yuden part #P04SB100M at Newark)

That's .22 each - if you can't afford that, send me a pm and I'll send a couple your way.
:-)
DanQ
danq is offline   Reply With Quote
Old 06-19-2008, 06:42 AM #41
Class 1M Laser
 
Join Date: Jun 2008
Posts: 232
Rep Power: 10
airy52 is on a distinguished road
Send a message via AIM to airy52
airy52 airy52 is offline
Class 1M Laser
 
Join Date: Jun 2008
Posts: 232
Rep Power: 10
airy52 is on a distinguished road
Send a message via AIM to airy52
Default Re: Driver Ideas. DC/DC stepup AND CCregulation

I guess you're right danq.... But samples rock. and if you only need a few i'm usually okay with it. But I guess I'll order some. Now I feel bad....
airy52 is offline   Reply With Quote
Old 06-19-2008, 06:52 AM #42
Class 2M Laser
 
Join Date: Sep 2007
Location: The Left Coast
Posts: 835
Rep Power: 17
danq is a glorious beacon of lightdanq is a glorious beacon of lightdanq is a glorious beacon of lightdanq is a glorious beacon of lightdanq is a glorious beacon of light
danq danq is offline
Class 2M Laser
 
Join Date: Sep 2007
Location: The Left Coast
Posts: 835
Rep Power: 17
danq is a glorious beacon of lightdanq is a glorious beacon of lightdanq is a glorious beacon of lightdanq is a glorious beacon of lightdanq is a glorious beacon of light
Default Re: Driver Ideas. DC/DC stepup AND CCregulation

Quote:
Originally Posted by airy52
I guess you're right danq.... But samples rock. and if you only need a few i'm usually okay with it. But I guess I'll order some. Now I feel bad....
Hey, don't feel bad... you have a whole culture to buck changing the "get what you can, I want it!" approach ;-)

I just loooked, and they have the 4.7uH version too - same price.

Newark is a great source. Sometimes I get stuff cheaper there than bargain bulk on eBay.

[edit - forgot to add: no minimum order or small-order handling fee! the only obstacle to tiny orders is postage - if you only buy 30 coils, postage will be about $5 via USPS]
danq is offline   Reply With Quote
Old 06-19-2008, 06:57 AM #43
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: Driver Ideas. DC/DC stepup AND CCregulation

maybe coilcraft should lower its shipping costs... its like $40 minimum
woop is offline   Reply With Quote
Old 06-19-2008, 07:06 AM #44
Class 1M Laser
 
Join Date: Jun 2008
Posts: 232
Rep Power: 10
airy52 is on a distinguished road
Send a message via AIM to airy52
airy52 airy52 is offline
Class 1M Laser
 
Join Date: Jun 2008
Posts: 232
Rep Power: 10
airy52 is on a distinguished road
Send a message via AIM to airy52
Default Re: Driver Ideas. DC/DC stepup AND CCregulation

5$ for something i can put in an envolope and mail for 23cents. hmmm
airy52 is offline   Reply With Quote
Old 06-19-2008, 08:12 AM #45
Class 2M Laser
 
Join Date: Sep 2007
Location: The Left Coast
Posts: 835
Rep Power: 17
danq is a glorious beacon of lightdanq is a glorious beacon of lightdanq is a glorious beacon of lightdanq is a glorious beacon of lightdanq is a glorious beacon of light
danq danq is offline
Class 2M Laser
 
Join Date: Sep 2007
Location: The Left Coast
Posts: 835
Rep Power: 17
danq is a glorious beacon of lightdanq is a glorious beacon of lightdanq is a glorious beacon of lightdanq is a glorious beacon of lightdanq is a glorious beacon of light
Default Re: Driver Ideas. DC/DC stepup AND CCregulation

Quote:
Originally Posted by airy52
5$ for something i can put in an envolope and mail for 23cents. hmmm
yeah, but they are a business and don't just toss parts around - their packaging is amazing. Order a few more items from them and the postage per item is negligible. Need ceramic caps for that buck/boost? how 'bout $0.066 for a 10uf 25V? get 50 of 'em just for the heck of it - $3.30, that's less than a day's worth of ice cream [sub];-)[/sub]

danq is offline   Reply With Quote
Old 06-19-2008, 08:53 AM #46
Class 1M Laser
 
Join Date: Jun 2008
Posts: 232
Rep Power: 10
airy52 is on a distinguished road
Send a message via AIM to airy52
airy52 airy52 is offline
Class 1M Laser
 
Join Date: Jun 2008
Posts: 232
Rep Power: 10
airy52 is on a distinguished road
Send a message via AIM to airy52
Default Re: Driver Ideas. DC/DC stepup AND CCregulation

youre quite the salesman, and this thread has gotten pretty off topic. you sure you dont work for coilcraft???
airy52 is offline   Reply With Quote
Old 06-19-2008, 01:31 PM #47
Class 2M Laser
 
Join Date: Sep 2007
Location: The Left Coast
Posts: 835
Rep Power: 17
danq is a glorious beacon of lightdanq is a glorious beacon of lightdanq is a glorious beacon of lightdanq is a glorious beacon of lightdanq is a glorious beacon of light
danq danq is offline
Class 2M Laser
 
Join Date: Sep 2007
Location: The Left Coast
Posts: 835
Rep Power: 17
danq is a glorious beacon of lightdanq is a glorious beacon of lightdanq is a glorious beacon of lightdanq is a glorious beacon of lightdanq is a glorious beacon of light
Default Re: Driver Ideas. DC/DC stepup AND CCregulation

Quote:
Originally Posted by airy52
youre quite the salesman, and this thread has gotten pretty off topic. you sure you dont work for coilcraft???
???

did you notice that the link in the above posts goes to a Vishay part, not Coilcraft?

I'm just trying to tell you about a great supplier.

Note also that the specific parts I mentioned are useful in the circuit being discussed...

or were you kidding with that remark?
danq is offline   Reply With Quote
Old 06-19-2008, 06:23 PM #48
rkcstr's Avatar
Class 3R Laser
 
Join Date: Dec 2007
Posts: 1,368
Rep Power: 142
rkcstr has a reputation beyond reputerkcstr has a reputation beyond reputerkcstr has a reputation beyond reputerkcstr has a reputation beyond reputerkcstr has a reputation beyond reputerkcstr has a reputation beyond reputerkcstr has a reputation beyond reputerkcstr has a reputation beyond reputerkcstr has a reputation beyond reputerkcstr has a reputation beyond reputerkcstr has a reputation beyond repute
rkcstr rkcstr is offline
Class 3R Laser
rkcstr's Avatar
 
Join Date: Dec 2007
Posts: 1,368
Rep Power: 142
rkcstr has a reputation beyond reputerkcstr has a reputation beyond reputerkcstr has a reputation beyond reputerkcstr has a reputation beyond reputerkcstr has a reputation beyond reputerkcstr has a reputation beyond reputerkcstr has a reputation beyond reputerkcstr has a reputation beyond reputerkcstr has a reputation beyond reputerkcstr has a reputation beyond reputerkcstr has a reputation beyond repute
Default Re: Driver Ideas. DC/DC stepup AND CCregulation

yeah, Newark is typically the cheapest for ceramic caps and they typically have resistors close to any value I'm looking for, for about $0.007 each, so I usually by them by the 1000s, LOL. Their selection isnt great, but I usually check their prices before I go anywhere else since they're typically the cheapest. And their packaging IS amazing! Each component (even a single inductor) is put in its own bubble mailer within a box!
__________________
Laser drivers and Test Loads - rkcstr.com

Enter discount code "LPF" during checkout to save 10% off of the regular prices!
rkcstr 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 03:49 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