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 02-19-2008, 01:59 PM #161
phenol's Avatar
Class 2M Laser
 
Join Date: Oct 2007
Posts: 533
Rep Power: 50
phenol has a reputation beyond reputephenol has a reputation beyond reputephenol has a reputation beyond reputephenol has a reputation beyond reputephenol has a reputation beyond reputephenol has a reputation beyond reputephenol has a reputation beyond reputephenol has a reputation beyond reputephenol has a reputation beyond reputephenol has a reputation beyond reputephenol has a reputation beyond repute
phenol phenol is offline
Class 2M Laser
phenol's Avatar
 
Join Date: Oct 2007
Posts: 533
Rep Power: 50
phenol has a reputation beyond reputephenol has a reputation beyond reputephenol has a reputation beyond reputephenol has a reputation beyond reputephenol has a reputation beyond reputephenol has a reputation beyond reputephenol has a reputation beyond reputephenol has a reputation beyond reputephenol has a reputation beyond reputephenol has a reputation beyond reputephenol has a reputation beyond repute
Default Re: Using a DC/DC converter to power the laser

i guess it'd better suffice, as there isnt another option really without metallized vias. it would also work if a small copper or al slab is glued on top of LM3410.


phenol is offline   Reply With Quote







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







Old 02-19-2008, 03:45 PM #162
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: Using a DC/DC converter to power the laser

Quote:
Originally Posted by phenol
i guess it'd better suffice, as there isnt another option really without metallized vias. it would also work if a small copper or al slab is glued on top of LM3410.
I agree that more is definatelly better in this case.. Vias directly below the IC would transfer the heat away more efficiently, but i was thinking, if the upper ground plane would be made to have large exposed areas on both sides of the chip, pieces of metal could be soldered directly next to it..

This, with another piece of metal glued on top of it, like you said, should work ok.. (At least i hope so)


BTW: I just recieved the answer from a local National Semi supplier, that the Eval. board will not be available till the end of march..

So i guess Woops circuit is the best way to go. It shouldn't be too expensive, to etch a few of these circuits.. Now if only CoilCraft would answer me..
__________________
Signature temporarily out of order...
IgorT is offline   Reply With Quote
Old 02-20-2008, 12:19 AM #163
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: Using a DC/DC converter to power the laser

metalised vias are not an option unless i get some made at express pcb or something. I don't think it should get too hot, it should only be switching <0.5A
I am going to get some solder paste from jaycar, make a board and see if i can solder it. I am still waiting on the inductors though. might try winding some
woop is offline   Reply With Quote
Old 02-20-2008, 02:37 PM #164
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: Using a DC/DC converter to power the laser

Well, i just got some Fastron power inductors in different values, and the second 3410 sample package just arrived - the YSD..

Even better, i just recieved a confirmation from CoilCraft! They shipped my samples yesturday.. This is great! Seems it helped to translate the R&D part of my website for them...


So i'm just finishing the layout, and etching it later today.. Hope i get it working soon..
__________________
Signature temporarily out of order...
IgorT is offline   Reply With Quote
Old 02-20-2008, 04:19 PM #165
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: Using a DC/DC converter to power the laser

Quote:
Originally Posted by woop
I redrew the lm3410 sepec design in eagle. its 23.7mm high 19mm wide and single sided
still learning to use eagle. had to make a new package for the LLP6
what do you guys think?
Hi Woop!


I showed your PCB to my engineer, and this is his response:

- The connections for the inducors are a little smaller than in the original (less cooling, more resistance)
- Inductor L1 is a little further away from the IC (more inductivity and resistance)
- The IC connections are a little close to the central GND for the IC (testing necessary to make sure, there are no short circuits after soldering)

Still, it should work just fine, as long as the right elements are used.



He also had an idea for the vias under the IC.. He suggested using a double sided board, the lower side only GND, drilling some holes under the IC, putting some copper wire, or resistor legs in them, soldering them on the lower GND plane, and cutting them away on the upper plane, flush with the PCB.

During reflow, the vias would then get soldered by themselves to the upper plane.. This should work for cooling.. Unfortunatelly i just bought single sided plates, so i'll go with my idea, and hope for the best.




BTW: I still don't understand the dimensions you specified (23.7mm high 19mm wide).. *My AixiZ modules are 30.5mm long and 11.7mm wide. Do you have shorter modules? If i print the eagle pic of your PCB to only 16.5mm wide, it's still 34.6 long.. If i make it 19mm wide it's 40mm long. And in this size, the IC fits it's connections perfectly.

It still fits in my enclosure with enough space left for the batteries, so it's perfect.. *I'm just trying to verify your results, because i don't understand, why mine is longer..
__________________
Signature temporarily out of order...
IgorT is offline   Reply With Quote
Old 02-20-2008, 11:16 PM #166
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: Using a DC/DC converter to power the laser

Oh, does anyone know, if the 1N5817 Schottky diode would be good for this?

I have all the other elements in SMD form, except for the diode.. The ratings seem to match, the only difference is, that the forward voltage is 0.05V higher (0.45)..
__________________
Signature temporarily out of order...
IgorT is offline   Reply With Quote
Old 02-21-2008, 12:37 AM #167
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: Using a DC/DC converter to power the laser

Quote:
Originally Posted by IgorT
I showed your PCB to my engineer, and this is his response:

- The connections for the inducors are a little smaller than in the original (less cooling, more resistance)
- Inductor L1 is a little further away from the IC (more inductivity and resistance)
- The IC connections are a little close to the central GND for the IC (testing necessary to make sure, there are no short circuits after soldering)

Still, it should work just fine, as long as the right elements are used.
Glad to hear it. i was expecting more criticism
i need to change the pads anyway, because they are diferent to the MSS6132-472MLB inductor which is reccomended.
i guess i can swap L1 and C1. although they are so close anyway when you think of the scale of the thing. and the ic connections are just according to the datasheet. i will check it and maybe make the pads a little shorter

Quote:
He also had an idea for the vias under the IC.. He suggested using a double sided board, the lower side only GND, drilling some holes under the IC, putting some copper wire, or resistor legs in them, soldering them on the lower GND plane, and cutting them away on the upper plane, flush with the PCB.

During reflow, the vias would then get soldered by themselves to the upper plane.. This should work for cooling.. Unfortunatelly i just bought single sided plates, so i'll go with my idea, and hope for the best.
i actually thought of that, but decided it would probably have more problems than it solved. like getting the wire to sit flush under the chip and not pushing it off the pcb. I donno. having a double sided pcb with the bottom layer all ground would help with shielding and slightly with heat dissipation even without vias under the chip, so i was going to use double layer anyway. i might try doing vias with solid copper wire.

Quote:
BTW: I still don't understand the dimensions you specified (23.7mm high 19mm wide).. My AixiZ modules are 30.5mm long and 11.7mm wide. Do you have shorter modules? If i print the eagle pic of your PCB to only 16.5mm wide, it's still 34.6 long.. If i make it 19mm wide it's 40mm long. And in this size, the IC fits it's connections perfectly.

It still fits in my enclosure with enough space left for the batteries, so it's perfect.. I'm just trying to verify your results, because i don't understand, why mine is longer..
yup your measurements are better than mine. i made them inside eagle and somehow screwed it up.
my axiz module is 30mm long without the lens screw
the board i printed to scale is 37mm x 17.5mm (after measuring it with an actual ruler :P )
woop is offline   Reply With Quote
Old 02-21-2008, 12:46 AM #168
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: Using a DC/DC converter to power the laser

I am going to have to redesign the pcb anyway to fit the proper inductors. we might as well use the layout in the demo board datasheet
http://www.national.com/an/AN/AN-1775.pdf
or just print it single layer with a bridge for the feedback wire

I hope you haven't etched it yet IgorT
woop is offline   Reply With Quote
Old 02-21-2008, 05:22 AM #169
phenol's Avatar
Class 2M Laser
 
Join Date: Oct 2007
Posts: 533
Rep Power: 50
phenol has a reputation beyond reputephenol has a reputation beyond reputephenol has a reputation beyond reputephenol has a reputation beyond reputephenol has a reputation beyond reputephenol has a reputation beyond reputephenol has a reputation beyond reputephenol has a reputation beyond reputephenol has a reputation beyond reputephenol has a reputation beyond reputephenol has a reputation beyond repute
phenol phenol is offline
Class 2M Laser
phenol's Avatar
 
Join Date: Oct 2007
Posts: 533
Rep Power: 50
phenol has a reputation beyond reputephenol has a reputation beyond reputephenol has a reputation beyond reputephenol has a reputation beyond reputephenol has a reputation beyond reputephenol has a reputation beyond reputephenol has a reputation beyond reputephenol has a reputation beyond reputephenol has a reputation beyond reputephenol has a reputation beyond reputephenol has a reputation beyond repute
Default Re: Using a DC/DC converter to power the laser

Quote:
Originally Posted by IgorT
Oh, does anyone know, if the 1N5817 Schottky diode would be good for this?

I have all the other elements in SMD form, except for the diode.. The ratings seem to match, the only difference is, that the forward voltage is 0.05V higher (0.45)..
im planning on using the same diode, 1n5819 rated for Vr=40V. i also have a bag /2-3kpcs/ of 16-Amp schottky rectifiers in TO220 but one would occuply like 1/2 of the total board space of the switcher.
phenol is offline   Reply With Quote
Old 02-21-2008, 10:25 AM #170
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: Using a DC/DC converter to power the laser

Quote:
Originally Posted by phenol
im planning on using the same diode, 1n5819 rated for Vr=40V. i also have a bag /2-3kpcs/ of 16-Amp schottky rectifiers in TO220 but one would occuply like 1/2 of the total board space of the switcher.
The 5819 has an even higher forward voltage (5.5V).. The 3410 datasheet specifies a diode with only 0.4Vf and it also says, that this diode can be the source of most of the efficiency losses, if not selected properly..

But if you think it should work, then great, at least i won't have to order a stupid diode from Farnell and wait another two weeks to get it...

I'll get both the 1N5817 and 19 and compare the results.


EDIT: My engineer says the 1N5817 should be perfect for this use, as it even has a slightly lower capacity, than the original.. The Vf difference shouldn't matter.. So i guess i'm all set.
__________________
Signature temporarily out of order...
IgorT is offline   Reply With Quote
Old 02-21-2008, 10:35 AM #171
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: Using a DC/DC converter to power the laser

Quote:
Originally Posted by woop
I hope you haven't etched it yet IgorT
Not yet, but i'm going to etch two now.. I don't have the correct inductors anyway, so they'll fit.

Oh, i see where the problem is now.. The inductor datasheet specifies only 2mm between the pads..
Oh well, looks like more drawing will be necessary.. And more label backing paper scratching.. But at least that means, the next batch will print even better...


On the other hand, i did just order some 4.7uH inductors from coilcraft, with a foot print, that fits your PCB perfectly...

The layout, the way it is in the datasheet would allow for different inductor sizes, so if you follow that, you shouldn't have any problems with any size inductors.
__________________
Signature temporarily out of order...
IgorT is offline   Reply With Quote
Old 02-21-2008, 01:42 PM #172
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: Using a DC/DC converter to power the laser

I'm currently drawing the PCB the way it is in the original..

I'm just thinking of bringing the FB line onto the upper plane. I don't think there should be any problems, if i lead it up from the IC, under the coil, and back down to the resistor..


Any thoughts?
__________________
Signature temporarily out of order...
IgorT is offline   Reply With Quote
Old 02-21-2008, 01:56 PM #173
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: Using a DC/DC converter to power the laser

ok I redrew the pcb. now it will fit the parts specified in the datasheet, I think.
this one is only 14 x 27.5mm
the second one is to fit big (by smd standards) diodes like the 1n5817

this design has a little less ground area for heatsinking so it is probably a good idea to glue a small heatsink to the chip or something (using a double layer board is probably a good idea just for more heat dissapation and shielding, just cover it while etching and ground it)
however it has lots of heatsinking for the inductors and they are nice and close to the chip
hopefully this one passes the engineer test
Attached Thumbnails
Using a DC/DC converter to power the laser-lm3410_board2.jpg  
woop is offline   Reply With Quote
Old 02-21-2008, 02:03 PM #174
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: Using a DC/DC converter to power the laser

here is a 600dpi bitmap suitable for printing to etch.
open it in paint, go to page setup and adjust to 15% size.
it should then print to scale
Attached Files
File Type: zip lm3410_board2print.zip (1.1 KB, 28 views)
woop is offline   Reply With Quote
Old 02-21-2008, 02:08 PM #175
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: Using a DC/DC converter to power the laser

Quote:
Originally Posted by IgorT
I'm currently drawing the PCB the way it is in the original..

I'm just thinking of bringing the FB line onto the upper plane. I don't think there should be any problems, if i lead it up from the IC, under the coil, and back down to the resistor..


Any thoughts?
oh didn't see that post. i didn't do that in case the feedback wire picked up emf from the coil or track runing along side. its probably best to keep it under ground tracks with a bridge wire
woop is offline   Reply With Quote
Old 02-21-2008, 03:13 PM #176
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: Using a DC/DC converter to power the laser

Quote:
Originally Posted by woop
oh didn't see that post. i didn't do that in case the feedback wire picked up emf from the coil or track runing along side. its probably best to keep it under ground tracks with a bridge wire
You're right.. I'll lead it underneath..

I just finished drawing mine, came here, and saw you did yours too...

Now i have to decide which one to use.. *Mine is pretty much the exact copy of the Evaluation board, only that i added some exposed GND plane on the left of the IC for cooling (the dog bone), for mounting a heat sink... I also added the elements, so their symbols will be etched into the copper..



Need to compare it to yours..


EDIT: Your new version is very very simple.. I like simple. Are the bitmaps mirrored already (for transfer) or not?

I also like the fact, that they would fit different size inductors..
__________________
Signature temporarily out of order...
IgorT 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 05:36 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