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 08-17-2014, 01:54 AM #161
rhd's Avatar
rhd rhd is offline
Class 4 Laser
 
Join Date: Dec 2010
Posts: 8,491
Rep Power: 1392
rhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond repute
rhd rhd is offline
Class 4 Laser
rhd's Avatar
 
Join Date: Dec 2010
Posts: 8,491
Rep Power: 1392
rhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond repute
Default Re: OPEN SOURCE: "CC-Boost" - 2.4 Amp boost driver - RC1

OSH stencils is fast. I think they cut them in the USA.

Okay, now that we have RC1 behind us, and there's a working, clean output, inexpensive 2.4A boost. It's worth discussing objectives for the future.

I would propose as a worthy next goal, the ability to reliably output a clean 4A at 5V, from a single lithium ion, without substantially increasing the size of the driver, and keeping the part costs under $10.

That's not an easy target.


__________________
CURRENT WAVELENGTHS:
405|441|450|467|473|495|505|520|532|556|PGLRG|589|594|632|638|660


SAFETY & IMPORTANT READING (threads authored and contributed to by various members of LPF):
- Federal Aviation Administration - Laser Safety Initiative (link)
- Info release from Laserglow - Default Canadian restrictions on portable lasers (link)
- The Necessity of Safety Goggles (link)

rhd is offline   Reply With Quote







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







Old 08-17-2014, 07:17 PM #162
IWIRE's Avatar
Class 2M Laser
 
Join Date: Dec 2013
Location: Oklahoma
Posts: 630
Rep Power: 248
IWIRE has a reputation beyond reputeIWIRE has a reputation beyond reputeIWIRE has a reputation beyond reputeIWIRE has a reputation beyond reputeIWIRE has a reputation beyond reputeIWIRE has a reputation beyond reputeIWIRE has a reputation beyond reputeIWIRE has a reputation beyond reputeIWIRE has a reputation beyond reputeIWIRE has a reputation beyond reputeIWIRE has a reputation beyond repute
IWIRE IWIRE is offline
Class 2M Laser
IWIRE's Avatar
 
Join Date: Dec 2013
Location: Oklahoma
Posts: 630
Rep Power: 248
IWIRE has a reputation beyond reputeIWIRE has a reputation beyond reputeIWIRE has a reputation beyond reputeIWIRE has a reputation beyond reputeIWIRE has a reputation beyond reputeIWIRE has a reputation beyond reputeIWIRE has a reputation beyond reputeIWIRE has a reputation beyond reputeIWIRE has a reputation beyond reputeIWIRE has a reputation beyond reputeIWIRE has a reputation beyond repute
Default Re: OPEN SOURCE: "CC-Boost" - 2.4 Amp boost driver - RC1

Quote:
Originally Posted by rhd View Post

That's not an easy target.
You seem to enjoy a challenge. If it would be possible to bump it 10%, to 4.4a, then it would be able to power the NDB7A75 to about it's max. That's the highest current draw "common" diode that's widely used and available at the present. Beggars can't be choosey though. I'd be thankful for anything close.
__________________

He said "Let there be light !",
and there was,
and it was good.
So we amplified it.
IWIRE is offline   Reply With Quote
Old 08-17-2014, 08:16 PM #163
rhd's Avatar
rhd rhd is offline
Class 4 Laser
 
Join Date: Dec 2010
Posts: 8,491
Rep Power: 1392
rhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond repute
rhd rhd is offline
Class 4 Laser
rhd's Avatar
 
Join Date: Dec 2010
Posts: 8,491
Rep Power: 1392
rhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond repute
Default Re: OPEN SOURCE: "CC-Boost" - 2.4 Amp boost driver - RC1

Quote:
Originally Posted by IWIRE View Post
You seem to enjoy a challenge. If it would be possible to bump it 10%, to 4.4a, then it would be able to power the NDB7A75 to about it's max. That's the highest current draw "common" diode that's widely used and available at the present. Beggars can't be choosey though. I'd be thankful for anything close.
Working backwards:
- 4.4 Amp, 5V output
- Assume we want the driver to run on an input down to 3.2V.
- Assume a roughly 200 mV drop across the sense resistor.
- Assume a saturation current of at least 1.4 x the input current.
((4.4 * (5 + 0.2)) / 3.2) * 1.4 = 10.01 Amps
We'd need a indcutor with a saturation current of 10A+.

This won't be an easy task. I'm not sure if it's doable within the constraints above (ie, keeping size under 13x13, and part cost under $10). A couple things are clear at this stage:
- To keep size in check, with that saturation current, we'll have to accept lower inductance.
- To keep ripple in check, with the lower inductance, we'll need a higher frequency IC.
- To handle this much current, we're going to need an IC that uses an external MOSFET.
- If the above is even possible, the input cell would need to be capable of very high current output (think Panasonics if 18650, or LiPos, etc)
__________________
CURRENT WAVELENGTHS:
405|441|450|467|473|495|505|520|532|556|PGLRG|589|594|632|638|660


SAFETY & IMPORTANT READING (threads authored and contributed to by various members of LPF):
- Federal Aviation Administration - Laser Safety Initiative (link)
- Info release from Laserglow - Default Canadian restrictions on portable lasers (link)
- The Necessity of Safety Goggles (link)


Last edited by rhd; 08-17-2014 at 08:23 PM.
rhd is offline   Reply With Quote
Old 08-17-2014, 08:18 PM #164
ARG's Avatar
ARG ARG is offline
Super Moderator
 
Join Date: Feb 2011
Location: Canada
Posts: 6,987
Rep Power: 1891
ARG has a reputation beyond reputeARG has a reputation beyond reputeARG has a reputation beyond reputeARG has a reputation beyond reputeARG has a reputation beyond reputeARG has a reputation beyond reputeARG has a reputation beyond reputeARG has a reputation beyond reputeARG has a reputation beyond reputeARG has a reputation beyond reputeARG has a reputation beyond repute
ARG ARG is offline
Super Moderator
ARG's Avatar
 
Join Date: Feb 2011
Location: Canada
Posts: 6,987
Rep Power: 1891
ARG has a reputation beyond reputeARG has a reputation beyond reputeARG has a reputation beyond reputeARG has a reputation beyond reputeARG has a reputation beyond reputeARG has a reputation beyond reputeARG has a reputation beyond reputeARG has a reputation beyond reputeARG has a reputation beyond reputeARG has a reputation beyond reputeARG has a reputation beyond repute
Default Re: OPEN SOURCE: "CC-Boost" - 2.4 Amp boost driver - RC1

Quote:
Originally Posted by rhd View Post
OSH stencils is fast. I think they cut them in the USA.

Okay, now that we have RC1 behind us, and there's a working, clean output, inexpensive 2.4A boost. It's worth discussing objectives for the future.

I would propose as a worthy next goal, the ability to reliably output a clean 4A at 5V, from a single lithium ion, without substantially increasing the size of the driver, and keeping the part costs under $10.

That's not an easy target.
Why not just make a PCB that is two of these in parallel?

I don't see a purpose of having a tiny driver for such a high current as any diode being driven at 4A will produce a lot of heat which will need a large heatsink, a large host and presumably have more room for the driver.
ARG is offline   Reply With Quote
Old 08-17-2014, 09:12 PM #165
crazyspaz's Avatar
Class 3B Laser
 
Join Date: Jul 2012
Location: IN, United States
Posts: 2,864
Rep Power: 1313
crazyspaz has a reputation beyond reputecrazyspaz has a reputation beyond reputecrazyspaz has a reputation beyond reputecrazyspaz has a reputation beyond reputecrazyspaz has a reputation beyond reputecrazyspaz has a reputation beyond reputecrazyspaz has a reputation beyond reputecrazyspaz has a reputation beyond reputecrazyspaz has a reputation beyond reputecrazyspaz has a reputation beyond reputecrazyspaz has a reputation beyond repute
crazyspaz crazyspaz is offline
Class 3B Laser
crazyspaz's Avatar
 
Join Date: Jul 2012
Location: IN, United States
Posts: 2,864
Rep Power: 1313
crazyspaz has a reputation beyond reputecrazyspaz has a reputation beyond reputecrazyspaz has a reputation beyond reputecrazyspaz has a reputation beyond reputecrazyspaz has a reputation beyond reputecrazyspaz has a reputation beyond reputecrazyspaz has a reputation beyond reputecrazyspaz has a reputation beyond reputecrazyspaz has a reputation beyond reputecrazyspaz has a reputation beyond reputecrazyspaz has a reputation beyond repute
Default Re: OPEN SOURCE: "CC-Boost" - 2.4 Amp boost driver - RC1

Quote:
Originally Posted by ARG View Post
Why not just make a PCB that is two of these in parallel?

I don't see a purpose of having a tiny driver for such a high current as any diode being driven at 4A will produce a lot of heat which will need a large heatsink, a large host and presumably have more room for the driver.
Theres a thought. How much bigger would it make the whole thing if you has essentially one driver per side? Surely not that much bigger, and even if it IS, like ARG said- any diode running at that current is bound to need a large host-heatsink. If you think of the SXB-2 boost drive by Lazeerer that can do 5A, its 26mm in diameter- not small by any means. I say if you can get it to that size or smaller, you could count it as a success.
crazyspaz is offline   Reply With Quote
Old 08-17-2014, 09:13 PM #166
rhd's Avatar
rhd rhd is offline
Class 4 Laser
 
Join Date: Dec 2010
Posts: 8,491
Rep Power: 1392
rhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond repute
rhd rhd is offline
Class 4 Laser
rhd's Avatar
 
Join Date: Dec 2010
Posts: 8,491
Rep Power: 1392
rhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond repute
Default Re: OPEN SOURCE: "CC-Boost" - 2.4 Amp boost driver - RC1

Quote:
Originally Posted by ARG View Post
Why not just make a PCB that is two of these in parallel?

I don't see a purpose of having a tiny driver for such a high current as any diode being driven at 4A will produce a lot of heat which will need a large heatsink, a large host and presumably have more room for the driver.
I have that perspective regarding boost drivers in general. I don't particularly like them, and hardly ever use them for anything.

In theory, I could see this being useful in a 26650 or 32650 host. I'd actually like to be able to run MTG2 LEDs in single cell flashlights.

Regarding paralleling though, I am not entirely confident in the cleanliness of the output. I've seen some strange behavior where it seems like the regulators take some time to get "in sync". It may actually just be a matter of beefing up the INPUT caps to solve a lot of paralleling issues with switching regs. But at any rate, one driver instead of two would be nice.
__________________
CURRENT WAVELENGTHS:
405|441|450|467|473|495|505|520|532|556|PGLRG|589|594|632|638|660


SAFETY & IMPORTANT READING (threads authored and contributed to by various members of LPF):
- Federal Aviation Administration - Laser Safety Initiative (link)
- Info release from Laserglow - Default Canadian restrictions on portable lasers (link)
- The Necessity of Safety Goggles (link)

rhd is offline   Reply With Quote
Old 08-17-2014, 09:21 PM #167
ARG's Avatar
ARG ARG is offline
Super Moderator
 
Join Date: Feb 2011
Location: Canada
Posts: 6,987
Rep Power: 1891
ARG has a reputation beyond reputeARG has a reputation beyond reputeARG has a reputation beyond reputeARG has a reputation beyond reputeARG has a reputation beyond reputeARG has a reputation beyond reputeARG has a reputation beyond reputeARG has a reputation beyond reputeARG has a reputation beyond reputeARG has a reputation beyond reputeARG has a reputation beyond repute
ARG ARG is offline
Super Moderator
ARG's Avatar
 
Join Date: Feb 2011
Location: Canada
Posts: 6,987
Rep Power: 1891
ARG has a reputation beyond reputeARG has a reputation beyond reputeARG has a reputation beyond reputeARG has a reputation beyond reputeARG has a reputation beyond reputeARG has a reputation beyond reputeARG has a reputation beyond reputeARG has a reputation beyond reputeARG has a reputation beyond reputeARG has a reputation beyond reputeARG has a reputation beyond repute
Default Re: OPEN SOURCE: "CC-Boost" - 2.4 Amp boost driver - RC1

I agree - I much prefer buck drivers.

Are there any open source buck drivers out there? I could see a high current buck driver being much more useful than high current boost driver.
ARG is offline   Reply With Quote
Old 08-17-2014, 09:26 PM #168
IWIRE's Avatar
Class 2M Laser
 
Join Date: Dec 2013
Location: Oklahoma
Posts: 630
Rep Power: 248
IWIRE has a reputation beyond reputeIWIRE has a reputation beyond reputeIWIRE has a reputation beyond reputeIWIRE has a reputation beyond reputeIWIRE has a reputation beyond reputeIWIRE has a reputation beyond reputeIWIRE has a reputation beyond reputeIWIRE has a reputation beyond reputeIWIRE has a reputation beyond reputeIWIRE has a reputation beyond reputeIWIRE has a reputation beyond repute
IWIRE IWIRE is offline
Class 2M Laser
IWIRE's Avatar
 
Join Date: Dec 2013
Location: Oklahoma
Posts: 630
Rep Power: 248
IWIRE has a reputation beyond reputeIWIRE has a reputation beyond reputeIWIRE has a reputation beyond reputeIWIRE has a reputation beyond reputeIWIRE has a reputation beyond reputeIWIRE has a reputation beyond reputeIWIRE has a reputation beyond reputeIWIRE has a reputation beyond reputeIWIRE has a reputation beyond reputeIWIRE has a reputation beyond reputeIWIRE has a reputation beyond repute
Default

I'm sure your right because this isn't the first time I've heard 10a at that current level with boost drives.
I built one using two sxb`s in parallel because that was available. When the cell is fully charged it draws 6a on start up and 5.5a during normal operation.
Does the input current go up as the cell depletes ? I guess I could just go run a cell down and find out.

Quote:
Originally Posted by ARG View Post
I agree - I much prefer buck drivers.

Are there any open source buck drivers out there? I could see a high current buck driver being much more useful than high current boost driver.
That would be sweet. I've heard rumors of them. Think they are related to mythical Unicorns
__________________

He said "Let there be light !",
and there was,
and it was good.
So we amplified it.

Last edited by IWIRE; 08-17-2014 at 10:10 PM. Reason: Combine posts
IWIRE is offline   Reply With Quote
Old 08-17-2014, 09:48 PM #169
The Lightning Stalker's Avatar
Class 3B Laser
 
Join Date: Aug 2013
Location: MI, US
Posts: 2,654
Rep Power: 716
The Lightning Stalker has a reputation beyond reputeThe Lightning Stalker has a reputation beyond reputeThe Lightning Stalker has a reputation beyond reputeThe Lightning Stalker has a reputation beyond reputeThe Lightning Stalker has a reputation beyond reputeThe Lightning Stalker has a reputation beyond reputeThe Lightning Stalker has a reputation beyond reputeThe Lightning Stalker has a reputation beyond reputeThe Lightning Stalker has a reputation beyond reputeThe Lightning Stalker has a reputation beyond reputeThe Lightning Stalker has a reputation beyond repute
The Lightning Stalker The Lightning Stalker is offline
Class 3B Laser
The Lightning Stalker's Avatar
 
Join Date: Aug 2013
Location: MI, US
Posts: 2,654
Rep Power: 716
The Lightning Stalker has a reputation beyond reputeThe Lightning Stalker has a reputation beyond reputeThe Lightning Stalker has a reputation beyond reputeThe Lightning Stalker has a reputation beyond reputeThe Lightning Stalker has a reputation beyond reputeThe Lightning Stalker has a reputation beyond reputeThe Lightning Stalker has a reputation beyond reputeThe Lightning Stalker has a reputation beyond reputeThe Lightning Stalker has a reputation beyond reputeThe Lightning Stalker has a reputation beyond reputeThe Lightning Stalker has a reputation beyond repute
Default Re: OPEN SOURCE: "CC-Boost" - 2.4 Amp boost driver - RC1

Quote:
Originally Posted by IWIRE View Post
Does the input current go up as the cell depletes ?
Yes. If output power must remain the same, then it
follows that the input power must also remain the
same. If input voltage is dropping, then where must
the input current go in order to maintain the same
power level?

In the real world, more current means more power
dissipated as heat through intrinsic resistances.
Therefore, as input voltage goes down, real input
power actually must INCREASE to compensate for
this lost efficiency.
__________________
ALL NEW MEMBERS MUST READ THIS!!! --> http://www.laserpointersafety.com

"Where, now, is the way by which the light distributes itself" - Job 38:24

YouTube Channel
The Lightning Stalker is offline   Reply With Quote
Old 08-17-2014, 10:03 PM #170
rhd's Avatar
rhd rhd is offline
Class 4 Laser
 
Join Date: Dec 2010
Posts: 8,491
Rep Power: 1392
rhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond repute
rhd rhd is offline
Class 4 Laser
rhd's Avatar
 
Join Date: Dec 2010
Posts: 8,491
Rep Power: 1392
rhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond repute
Default Re: OPEN SOURCE: "CC-Boost" - 2.4 Amp boost driver - RC1

Not only must input power stay the same as cell voltage drops, but it probably actually requires bit more wattage due to efficiency losses increasing as the in/out voltage difference grows larger.

The PCB size would double... any efficiency gains made up by combining two per board would be lost due to the need for larger traces and more input capacitance to compensate for the paralleling.

ARG: Re open bucks. Not sure if there are open designs. I've got many good bucks though, if you ever need something for a specific task. I have up to 4A in sub-1cm^2 that are super straightforward (just a pain to reflow, but fine for a driver or two at a time). 4A to 10A gets larger.
__________________
CURRENT WAVELENGTHS:
405|441|450|467|473|495|505|520|532|556|PGLRG|589|594|632|638|660


SAFETY & IMPORTANT READING (threads authored and contributed to by various members of LPF):
- Federal Aviation Administration - Laser Safety Initiative (link)
- Info release from Laserglow - Default Canadian restrictions on portable lasers (link)
- The Necessity of Safety Goggles (link)

rhd is offline   Reply With Quote
Old 08-17-2014, 10:20 PM #171
IWIRE's Avatar
Class 2M Laser
 
Join Date: Dec 2013
Location: Oklahoma
Posts: 630
Rep Power: 248
IWIRE has a reputation beyond reputeIWIRE has a reputation beyond reputeIWIRE has a reputation beyond reputeIWIRE has a reputation beyond reputeIWIRE has a reputation beyond reputeIWIRE has a reputation beyond reputeIWIRE has a reputation beyond reputeIWIRE has a reputation beyond reputeIWIRE has a reputation beyond reputeIWIRE has a reputation beyond reputeIWIRE has a reputation beyond repute
IWIRE IWIRE is offline
Class 2M Laser
IWIRE's Avatar
 
Join Date: Dec 2013
Location: Oklahoma
Posts: 630
Rep Power: 248
IWIRE has a reputation beyond reputeIWIRE has a reputation beyond reputeIWIRE has a reputation beyond reputeIWIRE has a reputation beyond reputeIWIRE has a reputation beyond reputeIWIRE has a reputation beyond reputeIWIRE has a reputation beyond reputeIWIRE has a reputation beyond reputeIWIRE has a reputation beyond reputeIWIRE has a reputation beyond reputeIWIRE has a reputation beyond repute
Default Re: OPEN SOURCE: "CC-Boost" - 2.4 Amp boost driver - RC1

Quote:
Originally Posted by The Lightning Stalker View Post
Yes. If output power must remain the same, then it
follows that the input power must also remain the
same. If input voltage is dropping, then where must
the input current go in order to maintain the same
power level?

In the real world, more current means more power
dissipated as heat through intrinsic resistances.
Therefore, as input voltage goes down, real input
power actually must INCREASE to compensate for
this lost efficiency.
Thanks. I thought that is where the discrepancy must be. I'm just learning about drives and how they actually operate. I can get a design into Eagle from Webbench and I can almost get a board set up. If I could just stop forgetting how I did something the day before
__________________

He said "Let there be light !",
and there was,
and it was good.
So we amplified it.
IWIRE is offline   Reply With Quote
Old 08-19-2014, 01:54 AM #172
rhd's Avatar
rhd rhd is offline
Class 4 Laser
 
Join Date: Dec 2010
Posts: 8,491
Rep Power: 1392
rhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond repute
rhd rhd is offline
Class 4 Laser
rhd's Avatar
 
Join Date: Dec 2010
Posts: 8,491
Rep Power: 1392
rhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond repute
Default Re: OPEN SOURCE: "CC-Boost" - 2.4 Amp boost driver - RC1

I think this (datasheet attached) is the winner for an IC to transition to for use in the next generation.

- Simple IC, and comes in a smaller package
- 1.2 Mhz, so almost 2.5x the switching frequency of the IC used in RC1 (smaller inductors needed)
- External MOSFET, so we can increase the current
Attached Files
File Type: pdf EUP2573.pdf (254.6 KB, 171 views)
__________________
CURRENT WAVELENGTHS:
405|441|450|467|473|495|505|520|532|556|PGLRG|589|594|632|638|660


SAFETY & IMPORTANT READING (threads authored and contributed to by various members of LPF):
- Federal Aviation Administration - Laser Safety Initiative (link)
- Info release from Laserglow - Default Canadian restrictions on portable lasers (link)
- The Necessity of Safety Goggles (link)


Last edited by rhd; 08-19-2014 at 01:56 AM.
rhd is offline   Reply With Quote
Old 08-19-2014, 09:05 AM #173
The Lightning Stalker's Avatar
Class 3B Laser
 
Join Date: Aug 2013
Location: MI, US
Posts: 2,654
Rep Power: 716
The Lightning Stalker has a reputation beyond reputeThe Lightning Stalker has a reputation beyond reputeThe Lightning Stalker has a reputation beyond reputeThe Lightning Stalker has a reputation beyond reputeThe Lightning Stalker has a reputation beyond reputeThe Lightning Stalker has a reputation beyond reputeThe Lightning Stalker has a reputation beyond reputeThe Lightning Stalker has a reputation beyond reputeThe Lightning Stalker has a reputation beyond reputeThe Lightning Stalker has a reputation beyond reputeThe Lightning Stalker has a reputation beyond repute
The Lightning Stalker The Lightning Stalker is offline
Class 3B Laser
The Lightning Stalker's Avatar
 
Join Date: Aug 2013
Location: MI, US
Posts: 2,654
Rep Power: 716
The Lightning Stalker has a reputation beyond reputeThe Lightning Stalker has a reputation beyond reputeThe Lightning Stalker has a reputation beyond reputeThe Lightning Stalker has a reputation beyond reputeThe Lightning Stalker has a reputation beyond reputeThe Lightning Stalker has a reputation beyond reputeThe Lightning Stalker has a reputation beyond reputeThe Lightning Stalker has a reputation beyond reputeThe Lightning Stalker has a reputation beyond reputeThe Lightning Stalker has a reputation beyond reputeThe Lightning Stalker has a reputation beyond repute
Default Re: OPEN SOURCE: "CC-Boost" - 2.4 Amp boost driver - RC1

That does indeed look very nice. I don't know how
you find these things. 1.2Mhz is pretty fast to be
switching a FET. Any idea of the switching losses?
__________________
ALL NEW MEMBERS MUST READ THIS!!! --> http://www.laserpointersafety.com

"Where, now, is the way by which the light distributes itself" - Job 38:24

YouTube Channel
The Lightning Stalker is offline   Reply With Quote
Old 08-20-2014, 02:06 AM #174
rhd's Avatar
rhd rhd is offline
Class 4 Laser
 
Join Date: Dec 2010
Posts: 8,491
Rep Power: 1392
rhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond repute
rhd rhd is offline
Class 4 Laser
rhd's Avatar
 
Join Date: Dec 2010
Posts: 8,491
Rep Power: 1392
rhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond repute
Default Re: OPEN SOURCE: "CC-Boost" - 2.4 Amp boost driver - RC1

Quote:
Originally Posted by The Lightning Stalker View Post
That does indeed look very nice. I don't know how
you find these things. 1.2Mhz is pretty fast to be
switching a FET. Any idea of the switching losses?


This might work for just a bit above 4A of boosted output.... shot in the dark though - this is getting up into some pretty heavy input currents.





Maybe this fall I'll test the design. I'll grab some of the chips to have on hand.
Attached Thumbnails
OPEN SOURCE: "CC-Boost" - 2.4 Amp boost driver - RC1-board.png   OPEN SOURCE: "CC-Boost" - 2.4 Amp boost driver - RC1-schem.png  
__________________
CURRENT WAVELENGTHS:
405|441|450|467|473|495|505|520|532|556|PGLRG|589|594|632|638|660


SAFETY & IMPORTANT READING (threads authored and contributed to by various members of LPF):
- Federal Aviation Administration - Laser Safety Initiative (link)
- Info release from Laserglow - Default Canadian restrictions on portable lasers (link)
- The Necessity of Safety Goggles (link)


Last edited by rhd; 08-20-2014 at 02:07 AM.
rhd is offline   Reply With Quote
Old 08-20-2014, 02:27 AM #175
IWIRE's Avatar
Class 2M Laser
 
Join Date: Dec 2013
Location: Oklahoma
Posts: 630
Rep Power: 248
IWIRE has a reputation beyond reputeIWIRE has a reputation beyond reputeIWIRE has a reputation beyond reputeIWIRE has a reputation beyond reputeIWIRE has a reputation beyond reputeIWIRE has a reputation beyond reputeIWIRE has a reputation beyond reputeIWIRE has a reputation beyond reputeIWIRE has a reputation beyond reputeIWIRE has a reputation beyond reputeIWIRE has a reputation beyond repute
IWIRE IWIRE is offline
Class 2M Laser
IWIRE's Avatar
 
Join Date: Dec 2013
Location: Oklahoma
Posts: 630
Rep Power: 248
IWIRE has a reputation beyond reputeIWIRE has a reputation beyond reputeIWIRE has a reputation beyond reputeIWIRE has a reputation beyond reputeIWIRE has a reputation beyond reputeIWIRE has a reputation beyond reputeIWIRE has a reputation beyond reputeIWIRE has a reputation beyond reputeIWIRE has a reputation beyond reputeIWIRE has a reputation beyond reputeIWIRE has a reputation beyond repute
Default

Quote:
Originally Posted by rhd View Post

this is getting up into some pretty heavy input currents.
It really is. I couldn't believe how much more 4.4a put a load on host components than 3a does. I had switches melting, voltage drop and heat at threaded connections. I finally got it all working but your right, it's asking a lot from components.
Thanks for working on this. Sounds like your already planning your Fall/Winter projects too.
__________________

He said "Let there be light !",
and there was,
and it was good.
So we amplified it.
IWIRE is offline   Reply With Quote
Old 08-20-2014, 03:49 AM #176
rhd's Avatar
rhd rhd is offline
Class 4 Laser
 
Join Date: Dec 2010
Posts: 8,491
Rep Power: 1392
rhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond repute
rhd rhd is offline
Class 4 Laser
rhd's Avatar
 
Join Date: Dec 2010
Posts: 8,491
Rep Power: 1392
rhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond repute
Default Re: OPEN SOURCE: "CC-Boost" - 2.4 Amp boost driver - RC1

Just ordered 30 eup2573. Will test the next iteration of this driver in the fall.
__________________
CURRENT WAVELENGTHS:
405|441|450|467|473|495|505|520|532|556|PGLRG|589|594|632|638|660


SAFETY & IMPORTANT READING (threads authored and contributed to by various members of LPF):
- Federal Aviation Administration - Laser Safety Initiative (link)
- Info release from Laserglow - Default Canadian restrictions on portable lasers (link)
- The Necessity of Safety Goggles (link)

rhd 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 11:01 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