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Old 01-06-2013, 09:51 PM #1233
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Default Re: FREE DIY open source BOOST driver!!! Tested & working!!

Quote:
Originally Posted by osmosis321 View Post
Tin can and propane torch... hmm.. I have a propane torch and a coffee can.. maybe I should try that..http://laserpointerforums.com/images...es/biggrin.gif

Just kidding, it's not just you.

True. I'd only do it on small boards with very few IC's, and only on prototypes or hobby stuff.

I doubt I'd sell them, for the very reasons you've mentioned. It's mostly for personal projects. This is for people who DIY, not for business.
That's what I was trying to convey in Post #1224...


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Old 01-07-2013, 01:37 AM #1234
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Default Ltc3113

I'm planning to design my own laser driver, and will keep it open source.

http://cds.linear.com/docs/Datasheet/3113f.pdf

I'm soliciting opinions. What I see here is a buck-boost driver capable of 3A/5.5V, 96% max efficiency, internal soft-start, and a typical app external component count of 10.

I also happen to know that the M140 drinks/drops max 2A/3.6V (PLEASE correct me if I'm wrong, as always) which would make this IC a good foundation for the design.

Only issue I see so far is price - they start at over $5 ea.
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Old 01-07-2013, 04:49 AM #1235
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Default Re: FREE DIY open source BOOST driver!!! Tested & working!!

I've been talking to Ben about making and selling these boost minis. I'm shooting for an assembled resell price at or under 10.
Depending on cost of parts and if I can get them assembled by a company, might get lower...

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Old 01-07-2013, 04:58 AM #1236
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Default Re: FREE DIY open source BOOST driver!!! Tested & working!!

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I've been talking to Ben about making and selling these boost minis. I'm shooting for an assembled resell price at or under 10.
Depending on cost of parts and if I can get them assembled by a company, might get lower...
Only way you'll get that kind of value for money is if you do at least a thousand at a time.

And the ben-boost mini can't handle an M140(?)

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Old 01-07-2013, 05:02 AM #1237
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Default Re: FREE DIY open source BOOST driver!!! Tested & working!!

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Only way you'll get that kind of value for money is if you do at least a thousand at a time.
Indeed.
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Old 01-07-2013, 05:10 AM #1238
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Default Re: FREE DIY open source BOOST driver!!! Tested & working!!

They would sell in a very reasonable amount of time as well.
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Old 01-07-2013, 05:20 AM #1239
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Default Re: FREE DIY open source BOOST driver!!! Tested & working!!

Done any sourcing on it?
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Old 01-07-2013, 06:00 AM #1240
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Default Re: FREE DIY open source BOOST driver!!! Tested & working!!

Not yet
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Old 01-07-2013, 08:18 PM #1241
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Default Re: FREE DIY open source BOOST driver!!! Tested & working!!

something to consider.. a company I've worked with before would be able to provide assembled boards at a reasonable cost. If you provide a BOM with digi-key part #'s they'll source the components, saves you having to physically send them anything.

The guy who runs the NA division owes me a bit of a favor, might be able to get free shipping out of him. If you want, pack up the gerbers and BOM and upload, I'll ask him for a quote.
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Old 01-07-2013, 08:39 PM #1242
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Default Re: FREE DIY open source BOOST driver!!! Tested & working!!

Been looking at the ben-boost -- the LM3410 is a fantastic choice, and Element14 currently has LM3410's on sale for $1.50 @ Qty 1000. Digi-key's current price is $1.59 @ Qty 3000. That's a good deal!
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Old 01-08-2013, 05:11 AM #1243
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Default Re: FREE DIY open source BOOST driver!!! Tested & working!!

Sourced out the parts and got the price of the driver to a very reasonable price. Ordered 500 boards tonight as well as a stencil for solder paste.

I plan to be more lenient with the output ranges this time as well, I'm going to shoot for 25mA increments in the output choices. After 1A it will probably go up to 100mA increments though.

Pricing will be about ~$10 retail for the assembled drivers. May do a pre-sale type of thing at an even lower price ($6 or $7?) To help pay for the total order.

We'll see how it all unfolds. I'm going to wait until the boards are closer to being here before I decide on any of that.
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Old 01-08-2013, 01:05 PM #1244
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Default Re: FREE DIY open source BOOST driver!!! Tested & working!!

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Sourced out the parts and got the price of the driver to a very reasonable price. Ordered 500 boards tonight as well as a stencil for solder paste.
Where did you buy from?

and what did you pay? (PM me if you don't want to blab it publicly)

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Old 01-08-2013, 01:45 PM #1245
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Default Re: FREE DIY open source BOOST driver!!! Tested & working!!

Ben, what is the purpose of that MOSFET? (sorry if this has alreadybeen discussed)
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Old 01-08-2013, 02:50 PM #1246
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Default Re: FREE DIY open source BOOST driver!!! Tested & working!!

Does not the LM3410 have 2.8A typical switch current? That's what the datasheet says. In your original post you talk about doubling up to get 2A, however the LM3410 should be able to do it with a single unit.
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Old 01-08-2013, 08:16 PM #1247
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Default Re: FREE DIY open source BOOST driver!!! Tested & working!!

First, what a great contribution! Second, I have downloaded all the files but how to I upload them to OSHPark?

Thanks!
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Old 01-08-2013, 08:18 PM #1248
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Default Re: FREE DIY open source BOOST driver!!! Tested & working!!

just go to oshpark and upload the .brd file, follow the instructions and place the order.
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