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Old 05-11-2015, 08:34 PM #1
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Default Alright driver guru's, please give opinion on this driver...

I found some of these drivers for two dollars each in a 17mm round rated for up to 8.4 VDC input and 1000ma out. I've been hunting high and low for a 400ma output 17mm round driver which could run off of 8.4 VDC, modifying this looks like my ticket., what do you think?



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Old 05-11-2015, 10:03 PM #2
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Default Re: Alright driver guru's, please give opinion on this driver...

Do you need more than one? Survival Laser sells one that is adjustable from 400mA to 1.1A, but they are $20.
Survival Laser Adjustable Current Driver

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Old 05-12-2015, 01:50 AM #3
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Default Re: Alright driver guru's, please give opinion on this driver...

Thanks Pi, looking at it, looks good.

By the way, checking out his drivers I found the specs for one he is offering:

Specifications:
Diameter: 16.84mm +/- .05mm
Input Voltage: 1.2*Vin - 16V
Output Voltage: <1V - 9V
Output Current: 1.5A - 3A (varies slightly per board)
Ripple Current: <100mA
Input Spike Current: <100mA
Efficiency: 85-90%
Circuit Continuity: Isolated D- and D+

Survival Laser Driver

NOW THAT'S THE PROPER WAY TO LIST DRIVER SPECIFICATIONS!!! Are you other driver sellers listening? Why don't you give this information?
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Sincerely investigate any of these three short quotes as new concepts and you've taken your first step into a larger world:

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

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Old 05-12-2015, 01:53 AM #4
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Default Re: Alright driver guru's, please give opinion on this driver...

Quote:
Originally Posted by Alaskan View Post
modifying this looks like my ticket., what do you think?
Yes. Change R250 to about R625.

R250 is clearly the current shunt because of its low value. If it's 1000mA, it follows the feedback voltage is 0.25V. Use ohm's law and adjust the shunt as you please. 0.25V/0.625ohm=0.4A
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Old 05-12-2015, 08:11 AM #5
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Default Re: Alright driver guru's, please give opinion on this driver...

Quote:
Originally Posted by Alaskan View Post
Are you other driver sellers listening? Why don't you give this information?
The specks for at least some of the drivers
are available in the Driver Specifications
Compendium thread.
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Old 05-12-2015, 03:13 PM #6
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Default Re: Alright driver guru's, please give opinion on this driver...

Thanks TLS & Cyparagon. Simple fix for that driver, tks!

Re: driver specs, it's just that when I go to a sellers web page and see most if not all of this information missing, it is very frustrating to me not to see the full specs as an electronics tech by trade. When I asked one seller why he doesn't list the specs right next to picture of the driver with the buy it button, he remarked his buyers know what they want already or understand which driver they need. OK, that's reasonable, anyone who buys them knows what they are doing... but what about the people who don't buy them because they don't know anything about it without the specs? (bang head on wall) I could just about spit nails over this stuff.

Need to knows:

Input voltage range
Output voltage range
Output current range (as well as adjustment range, if an adjustment pot)
Drop out voltage
Efficiency as well as duty cycle at full output, whether heat sinking is needed for full output.
Is there an over temp cut off?
Continuous positive, negative or isolated?

survival laser went even further and privided ripple information with the above listing I quoted. I will soon be buying.
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Laser Safety: http://www.laserpointersafety.com/index.html

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

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

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


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

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

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

Useless troll fighting.
.........................
PhotoB****t high jacking you too? Use this link instead:
http://imgbb.com

High resolution of my avatar: https://ibb.co/fWOhXF

Last edited by Alaskan; 05-12-2015 at 04:17 PM.
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