17mm & 20/26/27mm single-sided DD/FET driver release: A17DD-SO8 / A20DD-SO8 / etc

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FmC
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M4D M4X wrote:
can the LFPAK FETs be bought anywhere without 20 $ shipping (mouser/digikey) and be payad with paypal (no aliexpress) ?

i am interested in 5 for playing around…

I just get mine from RMM.

There may be cheaper fleabay options, but I’d rather not waste time ordering unknown’s.

bob808
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Any idea on the mosfet heat dissipation at 3A output?

cajampa
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bob808 wrote:
Any idea on the mosfet heat dissipation at 3A output?

Non really Smile the MOSFET in this kind of direct drive controlled by PWM levels makes no notiseble heat.

But in a linear MOSFET driven driver, like led4power’s LD-1 driver, they can get very hot in the middle levels.

M4D M4X
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I will try and order in Poland Wink

PLEASE NOTE
i do not work in "reviews, deals and codes" for the time being
maybe M4D M4X will return one day, but until then:

THANK YOU FOR YEARS OF YOUR SUPPORT AND FRIENDLY CONTACTS!

Mitko
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Whats with the A17DD author btw? i just realised he isnt active from a very long time…..too much work or an angly wife( like mine :bigsmile: ) ?

cajampa
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He just vanished one day, but made this last post.

I hope he comes back.

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Alex (wight) announced his hiatus before it happened. Think he thought he'd be back, dunno when. He is a big loss, specially after his insane flurry of work/releases/contributions. Still some open issues - would be nice if he was around to see all his designs thru. I use his DD+1's. Only person in a position to take over his role, sort of, is RMM in my opinion. Others previously heavily involved are gone too. Richard has the advantage of selling full up assembled boards, or full kits of parts, etc. - huge advantage.

cajampa
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Things like that he spoke about setting up a license for his designs just before he left, makes me worry something out of his control happened to him. He put in so much work in perfecting them & now they are in a kind of limbo as i see it, we know we here can order them from Ospark & use them at least, & i was fortunate to ask for permission on a future possible project before he left.

But then what? What are we allowed to do with them, because he isn’t available & he never set up a license we can’t know.

Although i will say that i never heard about anything he didn’t allow, but then again if there was, it is likely those discussions weren’t publicly disclosed anyway.

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Alex (wight) is doing well, he just needed to take a small break from this (sometimes life consuming) hobby.  

I can't say that I could ever fill his shoes, as I consider him to be a better designer than I am, and he was definitely more focused than I am.  I've got my head in lots of different places (studying for the bar, running the business, building drivers/lights, family, church, etc.) so for me designing and prototyping drivers is something that is very low on the priority list.  Wight was very dedicated and focused on his designs and was able to get a lot done in a short amount of time.  It probably takes me a month of development time to do what he was doing in a day.  

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Ohh, didnt knew that, i hope that he is doing well, indeed he did tremendous desing work for us Maybe a burn out who knows, or just life, maybe a new job

cajampa
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Good to hear he is doing well, and just needed a break from it all.

And i agree this hobby can eat up a lot of focus/time, sometimes i am :~ on how my priorities have changed since i got in to all of this.

Mitko
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17mm A17DD-SO8 v 044

Its that Richard`s alt desing? Any issues ?

Tom E
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Mitko wrote:
17mm A17DD-SO8 v 044 Its that Richard`s alt desing? Any issues ?

Where you seeing v044?

Mitko
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Here you are Tom

On 41 there is a label “dont use” already….and in fact i have some offtime issues with it( but it could be me, i am just a user)

Tom E
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Ahh: Alex == wight == RED Smile. No mention of it in the OP, but Alex's link at OSHPark goes to this thread... Weird.

Mitko
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The stangest thing is that there wasnt such a driver month ago when i ordered, its kinda new i am sure

So…maybe the OP is still developing in the shadows Wink

cajampa
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But the Ospark page says “Shared on January 12th, 2015 05:54” :~ strange

Mitko
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One quick question: has anybody tried that driver with 3x AA or D class batteries? Will it hold their max Uf? Its like 4.5-4.65v….

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AAs sag enough to work without issues.  Some good D cells might fry an emitter direct drive.  

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Mitko
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RMM wrote:

AAs sag enough to work without issues.  Some good D cells might fry an emitter direct drive.  

Beer Richard
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Ok, so I'm gonna go ahead and try to add my 2 cents here.    I'm not really sure if this is where I should post this, but it seems appropriate since what I have is really just a spin off of the OPs board.  


I asked nickelflipper to tweak the layout of this a hair for me because I needed a set of stars on  the bottom to access certain functions.    When doing one offs there is typically no need for this, but when you want to pre assemble large quantities of production type lights or bulbs, its really a pain to have to access the top side of the driver.

Case in point is the copper XHP-70 bulbs I make.   Since the driver is crimped in I wanted to be able to assemble them and still have the option to use the "lock" function with the DrJones Guppy2drv I got from RMM.

Anyway I have tested about 12 boards so far with 3 different user interfaces, including my Sport UI, the Guppy2, and DrJones Nlite.   The boards and stars seem to function perfectly using the layout and the exact BOM I will post.

Most of  the samples I tested used the 2S zener mod, but a few samples were also tested with the 1S set up.

Here is a link to the board at OSHPark.
https://oshpark.com/profiles/ForgivenMatt




I would suggest using the exact parts I am posting, from this seller and the brands only because it has been proven that all components and brands though they be marked the same  are NOT created equal.

I also very highly recommend ordering a stencil, even if your only going to do a few boards, because it makes them come out nearly perfect every time.

Here is the BOM from mouser

For single cell driver.
http://www.mouser.com/ProjectManager/ProjectDetail.aspx?AccessID=75156464cd

For 2 cell driver
http://www.mouser.com/ProjectManager/ProjectDetail.aspx?AccessID=96d1691809


Thanks again to everyone who has contributed to this project, especially to you wight!



PS: if anyone in China is reading this please clone my board and sell them back to us fully assembled for around $2.50 each!!

In Him (Jesus Christ) was life; and the life was the light of men. And the light shineth in darkness; and the darkness comprehended it not.
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Tom E
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+1 VOB, thanks for posting!

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vestureofblood wrote:
I asked nickelflipper to tweak the layout of this a hair for me because I needed a set of stars on  the bottom to access certain functions.    When doing one offs there is typically no need for this, but when you want to pre assemble large quantities of production type lights or bulbs, its really a pain to have to access the top side of the driver.
May I ask why you don’t have a larger via in the center to make spring bypass with wires easier?

vestureofblood wrote:
I also very highly recommend ordering a stencil, even if your only going to do a few boards, because it makes them come out nearly perfect every time.
I’ve not tried stencil’s yet as most of my driver boards are still under development and I haven’t yet settled for final versions. Do you get the stencils made from OSH Park? Or OSH Stencils?
Also, if I may ask, what do you upload as stencil mask? Looking at my solder mask layers it seems that bare copper battery contact plats, vias and ground rings are exposed. Do you need to edit them out prior to uploading the files?

Edit: Dont worry about answering the stencil question here (don’t wanna flood this thread with off topic clutter). I’ve asked in the Eagle video tutorial thread: http://budgetlightforum.com/node/31230

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Mike C wrote:
vestureofblood wrote:
I asked nickelflipper to tweak the layout of this a hair for me because I needed a set of stars on  the bottom to access certain functions.    When doing one offs there is typically no need for this, but when you want to pre assemble large quantities of production type lights or bulbs, its really a pain to have to access the top side of the driver.
May I ask why you don’t have a larger via in the center to make spring bypass with wires easier?

vestureofblood wrote:
I also very highly recommend ordering a stencil, even if your only going to do a few boards, because it makes them come out nearly perfect every time.
I’ve not tried stencil’s yet as most of my driver boards are still under development and I haven’t yet settled for final versions. Do you get the stencils made from OSH Park? Or OSH Stencils?
Also, if I may ask, what do you upload as stencil mask? Looking at my solder mask layers it seems that bare copper battery contact plats, vias and ground rings are exposed. Do you need to edit them out prior to uploading the files?

Edit: Dont worry about answering the stencil question here (don’t wanna flood this thread with off topic clutter). I’ve asked in the Eagle video tutorial thread: http://budgetlightforum.com/node/31230

I’ve been asked by vestureofblood to provide the answers to these questions. So,

1) A large middle pad for wire bypass on spring is a good idea, it just wasn’t considered at the time as only a braid bypass was discussed.

2) OSH Stencil was used for the paste mask. There should be a Top Paste Mask.GTP file in vob’s zip file which in turn can be previewed in gerbv, or some other gerber viewer. Vias are covered in this design, and wouldn’t normally show up in the paste layer anyway’s? Pads in the design could show up in the paste layer but don’t, just like the vias. The B+ contact and ground rings were scratch made, so a paste layer was not automatically included, like a component part, or say a stock pad design might. If they had, then yes you could just edit them out, so they wouldn’t show up in the stencil.

Here is the OSH Stencil preview.

Kent

Mitko
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I think his desing is good enough, that center pad can hold 9mm spring easy
The desing offers also a larger border pad: the original one was too small and i have to always mod it in C8( for instance)

10x for the efforts about that everyone

vestureofblood
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Thanks Kent..

Is there some way I can make a shared project at OSH stencil so everyone can just click for it (  like a t OSH Park?     I was able to load the file, but don't see any option to set this up.

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http://asflashlights.com/ Everyday Carry Flashlights, plus Upgrades for Maglite.

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Matt, I don’t believe that an open project setting exists in OSH Stencil, like OSH Park. So people are stuck with downloading your zip, and then transferring the paste mask file over.

Kent

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Good enough Smile

In Him (Jesus Christ) was life; and the life was the light of men. And the light shineth in darkness; and the darkness comprehended it not.
http://asflashlights.com/ Everyday Carry Flashlights, plus Upgrades for Maglite.

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Can someone give me a brief of what happened in there? I never checked this thread to be honest and from the last few posts I read, I gather this project is currently ‘in waiting’? Thanks

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MountainKing wrote:
Can someone give me a brief of what happened in there? I never checked this thread to be honest and from the last few posts I read, I gather this project is currently ‘in waiting’? Thanks

Just discussion about the driver. People are still making improvements, but it’s ready to use.

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Major Projects:  Illuminated Tailcap, TripleDown/TripleStack Driver

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