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

731 posts / 0 new
Last post
Rufusbduck
Rufusbduck's picture
Offline
Last seen: 1 month 2 weeks ago
Joined: 04/04/2012 - 15:34
Posts: 10389
Location: Golden state

Those caps aren’t polarized so something else was iffy.

Three Tanna leaves to give him life, nine to give him movement. But what if he eats the whole bag?

Scott

seepeli
Offline
Last seen: 5 years 5 months ago
Joined: 11/20/2014 - 16:37
Posts: 19
Location: Finland

I meant that the capacitors may have been on the wrong places, not in the wrong direction.
Sorry for the bad English Wink

pyro1son
pyro1son's picture
Offline
Last seen: 2 months 3 weeks ago
Joined: 03/21/2013 - 08:18
Posts: 432
Location: UK

Built my first one of these today. Had some issues at first I couldn’t get it to work checked every thing, diode direction, shorts ect… but could find any thing then I thought it might have been the firmware I flashed it with so tried a different one just to find out it couldn’t flash to the ATTiny13a I was using, swapped it and and hey presto it works.
Its now in a C8 with 25R powering two modes just need to get a dedomed XM-L on copper to finish it off J)

Pastebin                                      &nbs

sinner
sinner's picture
Offline
Last seen: 1 week 14 hours ago
Joined: 05/14/2013 - 18:33
Posts: 329
Location: UAE

Good work getting your first one to work, that’s mostly the hardest part.. Cheers!

contact(at)sinnercustoms.com

pyro1son
pyro1son's picture
Offline
Last seen: 2 months 3 weeks ago
Joined: 03/21/2013 - 08:18
Posts: 432
Location: UK

Would this be a good FET?

Pastebin                                      &nbs

Major
Major's picture
Offline
Last seen: 5 years 11 months ago
Joined: 11/10/2011 - 13:59
Posts: 232
Location: Peak district, UK
pyro1son wrote:
Would this be a good FET?

I tried one Here and it seemed to work ok but I didn’t pursue testing because I didn’t want to accidentally damage an ‘expensive’ fet, while the cheap ebay ones didn’t matter so much. Well, it was expensive, now they are offering free postage grr.

vestureofblood
vestureofblood's picture
Offline
Last seen: 23 hours 28 min ago
Joined: 08/17/2012 - 15:21
Posts: 1980
Location: Missouri

HI all,

Once again it seems vesture is struggling to tread water in the shallow end.    

I have used a lot of these drivers with the zener mod and they seem to work fine, but for some reason I have yet to be able to get a working single cell version.

Here is my board.





With this exact setup I get NO light what so ever.      I built 2 identical boards to make sure it was not a bad component.

If I replace the 19.1K resistor at R1 with the 36K resistor used for the zener mod I do get light, but when I change modes into the higher up ones it stays there for a second or two and then cascades back down to the lowest mode.

I have tried this with 2 different firmwares and the results are very similar with each.


The boards and the FET are from Mountain electronics so they are proven components.


Any stab would be helpful 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.

Bob Loblaw
Offline
Last seen: 3 months 2 weeks ago
Joined: 07/22/2013 - 04:01
Posts: 104

are the capacitors in the right place? C1 should have the bigger one, hard to tell from the pic

vestureofblood
vestureofblood's picture
Offline
Last seen: 23 hours 28 min ago
Joined: 08/17/2012 - 15:21
Posts: 1980
Location: Missouri

I agree it is hard to tell from the pic.    Yes I did at least have that right 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.

RMM
RMM's picture
Offline
Last seen: 1 year 3 months ago
Joined: 07/23/2013 - 13:47
Posts: 4006
Location: USA

Hard to see, but are you sure that the C1 capacitor is the correct value? 

Mountain Electronics : batteries, Noctigon, and much more! What's new? 

Tom E
Tom E's picture
Offline
Last seen: 4 hours 40 min ago
Joined: 08/19/2012 - 08:23
Posts: 14199
Location: LI NY

How bout the diode - is it in the correct direction? A reversed diode would kill it. Also for LVP, I don't use the 19.1K, I use the 22K's as listed in the OP.

vestureofblood
vestureofblood's picture
Offline
Last seen: 23 hours 28 min ago
Joined: 08/17/2012 - 15:21
Posts: 1980
Location: Missouri

RMM wrote:

Hard to see, but are you sure that the C1 capacitor is the correct value? 



No, I'm not certain.    The smaller one came from you, but the big one is mine from a batch of custom 7135 boards.    That, the 19.1K resistor and also the diode were mine.   Here is a pic of the PN.




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.

Tom E
Tom E's picture
Offline
Last seen: 4 hours 40 min ago
Joined: 08/19/2012 - 08:23
Posts: 14199
Location: LI NY

Ahhhh- why is this board layout you have completely different from v024 in the OP? What is the board you are using?

What is this mystery board??? Anyone?

sinner
sinner's picture
Offline
Last seen: 1 week 14 hours ago
Joined: 05/14/2013 - 18:33
Posts: 329
Location: UAE

try using stock components for your first working board, it will also serve as control and only then you can experiment further.. It may be a little too much troubleshooting otherwise.. Just a suggestion, i had a few failures in a very similar way.

contact(at)sinnercustoms.com

vestureofblood
vestureofblood's picture
Offline
Last seen: 23 hours 28 min ago
Joined: 08/17/2012 - 15:21
Posts: 1980
Location: Missouri

The board is from Mountain electronics.  

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.

RMM
RMM's picture
Offline
Last seen: 1 year 3 months ago
Joined: 07/23/2013 - 13:47
Posts: 4006
Location: USA

Maybe the Y5V cap isn't cutting it?  Those are the crappiest ones out there...but besides that, everything looks great.  What you're experiencing sounds like what happens when the capacitor isn't there or is too low of a value.  The DC bias derating on those caps is horrific.  

Try a better capacitor (maybe from one of my pre-built boards?) and see if that changes how it works.  

Mountain Electronics : batteries, Noctigon, and much more! What's new? 

nickelflipper
nickelflipper's picture
Offline
Last seen: 1 month 2 days ago
Joined: 10/20/2012 - 09:31
Posts: 497
Location: Oregon

Vob try bypassing (i.e. shorting) the D1 protection diode and see if that clears it up, then get back to us.

EDIT: Upon further inspection MTN Elec board has the C1 cap placed correctly for 1S DD operation, my bad eyes, sorry.

Kent

FmC
FmC's picture
Offline
Last seen: 3 months 2 weeks ago
Joined: 03/31/2013 - 05:23
Posts: 2197
Location: Brisbane, AU

For what it’s worth, I had similar issues with the single sided boards using components robbed from 105 nanjg’s.

I’ve had to go back to the original dual-sided fet boards until my order from RMM gets here with the better quality caps.

Mitko
Mitko's picture
Offline
Last seen: 5 months 3 weeks ago
Joined: 09/19/2014 - 05:20
Posts: 1537
Location: Bulgaria

I use Samsung caps( they are cheap arround here, 1.3 euros for 100pcs) and i dont have a single issue so far

For those of us, that do have shipping issues with Digikey and Mouser( actualy shipping costs issues)
those A13 controllers are good
- they seem original, the price is only 40 cents – i already bought 30 of those and i dont have issues with them: several i reprogramed many times ( one of them over 30 times, my test board)

Those MOSFETs are fine too

Mitko
Mitko's picture
Offline
Last seen: 5 months 3 weeks ago
Joined: 09/19/2014 - 05:20
Posts: 1537
Location: Bulgaria
Tom E wrote:

Ahhhh- why is this board layout you have completely different from v024 in the OP? What is the board you are using?

What is this mystery board??? Anyone?

I got several or those from Nitro, they are branded V030, with two of them have an offtime memory issue, was thinking its caused by capasitors, but after changing them the problem still stays

Tom E
Tom E's picture
Offline
Last seen: 4 hours 40 min ago
Joined: 08/19/2012 - 08:23
Posts: 14199
Location: LI NY

Yes, someone answered that above. Technically, this is in the wrong thread because this thread is on wight's boards, not RMM's, but really doesn't matter - VOB is having problems and getting some good help so all is good here. I might have missed VOB's note in the post about being from MtnE.

The MCU link is good - cheap source. I got burned before though by ordering MCU's off of eBay from China where every single MCU could not be programmed. The date code was like from 2011. The seller refused to admit to any wrong doing but didn't understand anything about the MCU's. The batch he was selling were probably pre-programmed in a way to make them not programmable via the normal USB dongle method. Think it was $15 for qty 20.

finges
Offline
Last seen: 1 day 17 hours ago
Joined: 11/19/2014 - 14:50
Posts: 504
Location: Germany

Mitko wrote:

http://www.ebay.com/itm/200990104141
http://www.aliexpress.com/item/PSMN3R0-30YL-115-30V-100A-LFPAK-PSMN3R0-30YL-3R0-30Y-PSMN3R0-30-3R0-30YL-PSMN3R0-3R0/2033377975.html

thanks for the links, looks like a good offer on both, bought some Smile
Mitko
Mitko's picture
Offline
Last seen: 5 months 3 weeks ago
Joined: 09/19/2014 - 05:20
Posts: 1537
Location: Bulgaria

Yeah Tom, you are right, but the Digikey US shipping is quite allright, for me its 60$….same with Mouser, Farnell got those at 2.5 euros per piece here( like 3$ )….and sometimes Farnell has hella wierd shipping policy, 2 years ago i ordered 25 cob emitters from farnell, and since they dont have them( in spire they claim they do) in the Uk warehouse they tried sending them from the US- 45$ shipping charge plus 190$ tax for handling and packaging( chips alone costed like 90$ i)…. :bigsmile: …i denied the order ofc

Anyway, same Ali guy has good schottky diodes too

finges
Offline
Last seen: 1 day 17 hours ago
Joined: 11/19/2014 - 14:50
Posts: 504
Location: Germany

Mitko wrote:
Anyway, "same Ali guy has good schottky diodes too":http://www.aliexpress.com/item/ZLLS410TA-10V-570MA-SOD323-ZLLS410T-410-Z... I bought these and they seem to be alright http://www.ebay.de/itm/200990156954
sinner
sinner's picture
Offline
Last seen: 1 week 14 hours ago
Joined: 05/14/2013 - 18:33
Posts: 329
Location: UAE

I found this chart on NXP’s website im just confused to say the least. I know 3R0’s are recommended and i have been using those, while there is a debate that 2R4-30YLDX (RMM’s choice) are better , there are even lower resistance ones out there, but they have higher capacitance? not sure if lower is better for our application.

Mosfet Selection Guide: At Page 83
http://www.nxp.com/documents/selection_guide/75017631.pdf

contact(at)sinnercustoms.com

RMM
RMM's picture
Offline
Last seen: 1 year 3 months ago
Joined: 07/23/2013 - 13:47
Posts: 4006
Location: USA

We don't care that much about the slightly higher capacitance at our relatively pedestrian 19kHz switching speed.  

I don't think that the 2R4 is really better or worse than the 3R0--it just happened to be available in bulk at a time that the 3R0 was not.  The 0R9 is the best out of NXP's line, and the SIR800DP I think is even better than that.  But really, you're just splitting hairs at this point.   

Mountain Electronics : batteries, Noctigon, and much more! What's new? 

hank
hank's picture
Offline
Last seen: 4 days 3 hours ago
Joined: 09/04/2011 - 21:52
Posts: 9569
Location: Berkeley, California
Quote:
RMM is planning to sell these soon, after he gets time to build them.

Are we there yet? Almost?

pyro1son
pyro1son's picture
Offline
Last seen: 2 months 3 weeks ago
Joined: 03/21/2013 - 08:18
Posts: 432
Location: UK

Build one of these yesterday for a DD red Convoy S2+ I was building and some how managed to get LED + and – connected which shorted out and melted my switch and soldered the switch spring to the bottom of my 25r. To say I panicked is an understatement. Good news is I’ve fixed it and it’s a BEAST! Just need to tweak the firmware to make it perfect.

Pastebin                                      &nbs

M4D M4X
M4D M4X's picture
Offline
Last seen: 5 days 20 hours ago
Joined: 03/19/2014 - 05:17
Posts: 8821
Location: Austria (GMT + 1)

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…

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
Mitko's picture
Offline
Last seen: 5 months 3 weeks ago
Joined: 09/19/2014 - 05:20
Posts: 1537
Location: Bulgaria

Seen those on Ebay, but havent realy tested them, the ones that i boguth from Ali are originals, at least 100% same as my first Farnell order( that costed me 4 times more)

M4D M4X , if you cant find those i will visit the PO thuesday MSG me if you like some, you are doing great BLF community job( and all those nice codes too), i will be happy to help you

This is a polish company , they can be trusted too, i work with them from time to time and their shipping isnt that high

Can be a good option for EU buyers too

Pages