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Old 08-05-2011, 12:35 PM #1
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Default The best DIY driver circuit

Hi,

I just ordered this and I am currently going off of this tutorial for my driver. I want to know if it is the best design for a DIY driver, or if there are any other better designs/tutorials out there to power the diode I purchased. Also I am having trouble finding inexpensive laser safety goggles that are designed for a 405nm.

Thanks!


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Old 08-06-2011, 03:15 PM #2
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Default Re: The best DIY driver circuit

you want to do a stationary or portable laser?
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Old 08-06-2011, 03:32 PM #3
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Default Re: The best DIY driver circuit

A DDL drivers work fine, and are generally the easiest to build. The only downside is that you need a host large enough to accommodate all the parts, and they are linear buck drivers, so they don't work with single li-ion builds. The output filter cap and the reverse polarity protection diode in actuality aren't necessary, though if you have room in your build, they're worth adding.
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Old 08-06-2011, 04:18 PM #4
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Default Re: The best DIY driver circuit

I am making a portable laser in a radio shack 4x2x1 box. It have made the driver according to ROG8811's tutorial. and it fits inside of the box. I now just need to find some <$20 laser goggles for 405nm.
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Old 08-06-2011, 05:39 PM #5
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Default Re: The best DIY driver circuit

Quote:
Originally Posted by qumefox View Post
...The output filter cap and the reverse polarity protection diode in actuality aren't necessary, though if you have room in your build, they're worth adding.
Unless you're building a low-dropout IC based DDL circuit. Then you definitely need the output cap for stability.
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Old 08-06-2011, 05:50 PM #6
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Default Re: The best DIY driver circuit

Nope. Not running it off batteries at least. The capacitor on the output is merely to eliminate noise and ripple.. Neither of which your really going to have using batteries and a lm317. The amount of dropout really has nothing to do with it. The capacitor is just a filter, nothing else. And if there's nothing to filter, it can be omitted without changing anything.

If you were trying to run the DDL off an unregulated powersupply like a wallwart.. then yes.. You would need the filtering. But not operating it off batteries.
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Old 08-07-2011, 05:28 PM #7
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Default Re: The best DIY driver circuit

I recommend this driver:
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Old 08-07-2011, 05:54 PM #8
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Default Re: The best DIY driver circuit

That's certainly an interesting design. Looks like a boost converter capable of 5.5V and between 1.5 and 2A maximum?
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Old 08-07-2011, 07:08 PM #9
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Default Re: The best DIY driver circuit

Quote:
Originally Posted by qumefox View Post
That's certainly an interesting design. Looks like a boost converter capable of 5.5V and between 1.5 and 2A maximum?
More, 4A.

It can deliver 1A and 5V output, with an input at only 1,8V

input voltage 1.8 to 5.5

Here you can download the datasheet:

http://www.ic-on-line.cn/download.ph...032_262939.pdf
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Old 08-07-2011, 07:17 PM #10
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Default Re: The best DIY driver circuit

How do I open the .LAY file?
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Old 08-07-2011, 08:26 PM #11
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Default Re: The best DIY driver circuit

That boost driver seems interesting. How complicated would it be to build?
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Old 08-07-2011, 11:23 PM #12
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Default Re: The best DIY driver circuit

Not quite. How the circuit is designed determines the maximum power handling capability. What the switch is rated at is just an absolute maximum. Capabilities in real world applications are generally 40-50% of the switch maximum unless your using a circuit with large traces and very beefy components.. Which you won't be if you expect it to fit in the size host you'd expecting to be using with a single li-ion.

And saleenman.. Here. I believe this will open it. http://www.abacom-online.de/uk/html/sprint-layout.html and I think they have a free viewer. I think it's the layout for the driver he used in his laser in this thread. 445nm laser by abyz

Quote:
Originally Posted by piferal View Post
More, 4A.

It can deliver 1A and 5V output, with an input at only 1,8V

input voltage 1.8 to 5.5

Here you can download the datasheet:

http://www.ic-on-line.cn/download.ph...032_262939.pdf
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Old 08-08-2011, 07:40 AM #13
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Default Re: The best DIY driver circuit

Quote:
Originally Posted by saleenman View Post
How do I open the .LAY file?
use program SprintLayot 5.0

Quote:
Originally Posted by qumefox View Post
Not quite. How the circuit is designed determines the maximum power handling capability. What the switch is rated at is just an absolute maximum. Capabilities in real world applications are generally 40-50% of the switch maximum unless your using a circuit with large traces and very beefy components.. Which you won't be if you expect it to fit in the size host you'd expecting to be using with a single li-ion.

And saleenman.. Here. I believe this will open it. Sprint-Layout and I think they have a free viewer. I think it's the layout for the driver he used in his laser in this thread. 445nm laser by abyz
no, in that laser I used ZXSC400(I wrote at the beginning of the theme). Driver, which I proposed here, I use in another 445nm laser. its size 13х18х12mm:
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Old 08-08-2011, 01:16 PM #14
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Default Re: The best DIY driver circuit

Thanks! I use Express PCB and MultiSIM, so I was trying to open it with those.
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Old 08-08-2011, 02:29 PM #15
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Default Re: The best DIY driver circuit

Also here you have another design of a Current Boost Converter with this IC TPS61032), includes the PCB Layout, and the list of materials.

http://focus.ti.com/lit/ug/slvu080a/slvu080a.pdf
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