comfychair-inspired quick+cheap+lazy single-sided 17DD FET-driver (poor man's nanjg92)

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luminarium iaculator
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I managed to redo fujik treatment. Everything was in place although artic alumina under FET melted during fan de soldering. It seems that FET died since it looks and smells smoked but I did not want to bother replacing with another one. Curious thing is that driver still works on one weak mode.

 

With this test I found that FUJIK can withstand heat better than artic alumina when we do plastic to pcb gluing like I did with FET before leg and wire soldering.

For metal to metal I don't even doubt AA is far better than Fujik.

So if curing time is not issue I suggest that you put fujik under small FET. Than wait for 24hours for firm fujik cure in warm room, and after that you can finish driver leg soldering and adding +- wires.

 

ImA4Wheelr
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You made me just recall something.  I once modded a Nanjg 105C similar to what you did above and it only had High mode too.  Turned that the FET Drain Pin (Big Tab across the back of the FET) was touching the inside of the pill and thus taking ground straight to the LED - Lead.

EDIT: I must be having a brain fart.  Is the Gate soldered to Ground and the Source to the PWM feed?  That can't be right.  The OP shows the same setup though.  I thought these N-Channels in this package were bottom-left pin = Gate and bottom-right pin = Source (when looking from the top).  I must have something mixed up.

luminarium iaculator
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I don't know how to properly express myself but everything is connected as Djozz said. Like this:

I just scrape solder mask of those 4 vias and fill vias with solder for even better + contact to spring side.

My situation(one mode only) happened after shorting +- upper emitter wires with reflector ( i had only one layer of kapton tape on the bottom of reflector as protection and while I was pressing reflector +- wires somehow managed to dig hole into kapton tape, and then smoke out happened Smile )

My drivers are potted so no way anything contacts with pill.

I haven't had any driver failure so far and they are in use for more than 3 months by various people.

It is dirt cheap and it works. It works even when smoked Smile

cajampa
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Do we have a new competitor for a low cost FET driver.
The BLF A6 driver is for sale from banggood Wink

A little more expensive but with the +7135 also Smile and TK’s A6 firmware.

djozz
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cajampa wrote:
Do we have a new competitor for a low cost FET driver. The "BLF A6 driver":http://www.banggood.com/BLF-A6-A17DD-L-FET1-2_8-4_35v-74-Modes-Flashligh... is for sale from banggood Wink A little more expensive but with the +7135 also Smile and TK's A6 firmware.

Jay! They did not dare to show TK's UI diagram Undecided

antiparanoico
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cajampa wrote:
Do we have a new competitor for a low cost FET driver.
The BLF A6 driver is for sale from banggood Wink

A little more expensive but with the +7135 also Smile and TK’s A6 firmware.


Game Over. Sad

If anything can go wrong, it will.
Matter will be damaged in direct proportion to its value.

luminarium iaculator
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cajampa wrote:
Do we have a new competitor for a low cost FET driver. The "BLF A6 driver":http://www.banggood.com/BLF-A6-A17DD-L-FET1-2_8-4_35v-74-Modes-Flashligh... is for sale from banggood Wink A little more expensive but with the +7135 also Smile and TK's A6 firmware.

I would not say this driver is winner over my diy Djozz driver guys.

My driver has High - mid - low without memory effect so it always starts on high. And I would not change that for new banggood driver unless they made similar modes.

Yes BG driver looks good but modes does not sound good to me.

 

 

Edit: - diy driver has reverse polarity protection

        - It has a kind of low battery warning protection (light drops on about 1-2% at 2,8V of battery)

        - 4.3A current draw of single ncr18650PF and all that stays in nice regulation for about 10 minutes on high and than another 10 minutes of 90-80% power, and then another 10-15 minutes around 80-50% output and then after some time it steps to low light warning protection which works for about 1 hour until  it drops to 2,5V battery voltage.

         - It is safe from start to complete battery discharge. So for all driver creators please try to make simple fet driver without memory, and user interface and with High - mid - low mode. Why? Try to sell flashlight to hunters and military guys and they'll say that they want instant full power action without any user interface.

Driver makers please try to make this mentioned version of driver and I guarantee that it will be your bestseller. You have nothing to loose.

 

cbrake10
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Has anybody used 3 leg FETs for this? I’m not getting any power through to the LED mains. Are the pins roughly the same as the 4 leg FETs?

-Clark

djozz
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cbrake10 wrote:
Has anybody used 3 leg FETs for this? I'm not getting any power through to the LED mains. Are the pins roughly the same as the 4 leg FETs?

I'm not very knowledgable in FET's, I just use what others use. I do hear that one FET is not the other, and that the specs highly matter. So if you post which exact FET you use, I hope that someone who does know this stuff will chime in.

bikedude
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you can check pin assignment in the datasheet of the respective FET.

cbrake10
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I pulled it off my zy-t08 driver and was too eager to try it to look it up. I’ll do some poking on the t08 driver to see where each leg went.

edit
turns out to be the opposite of the FET used in the OP. Either needs to be rotated 180 degrees or mounted right-side-up. I chose right side up and isolated the back/bottom pad of the fet with kapton tape.

-Clark

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cbrake10 wrote:
I pulled it off my zy-t08 driver and was too eager to try it to look it up. I’ll do some poking on the t08 driver to see where each leg went.

edit
turns out to be the opposite of the FET used in the OP. Either needs to be rotated 180 degrees or mounted right-side-up. I chose right side up and isolated the back/bottom pad of the fet with kapton tape.


Always a good idea to search the code on an unknown FET. Not all or even close to all of them are appropriate to this usage. Look for the PDF data sheets with pinouts, drain source resistance, and gate voltage. If you don’t understand them then post a link to the PDF so it can be checked.

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

Scott

luminarium iaculator
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Guys I need fresh FET source (Ebay or others) cause it seems old links from this thread no longer works.

So please if anyone have fresh links for FET we use with this driver.

OscarM
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i have been thinking about trying this mod as well, but my programming-efforts so far have been limited to buying the hardware.
I was thinking about the mosfets mtn have, would one of them be good for this mod? and if, which one? http://www.mtnelectronics.com/index.php?route=product/category&path=25_76

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http://www.ebay.com/itm/2pcs-New-NXP-4O30AL-403OOAL-4O3OAL-PH-4030AL-PH4030AL-SOT669/401027338093?_trksid=p2047675.c100011.m1850&_trkparms=aid%3D222007%26algo%3DSIC.MBE%26ao%3D1%26asc%3D34492%26meid%3D765e20dd42dd4e97bfe8b04e06bc3636%26pid%3D100011%26rk%3D1%26rkt%3D9%26sd%3D400900238110

Dallas
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These mosfets from Mtn will work best…http://www.mtnelectronics.com/index.php?route=product/product&path=25_76&product_id=439
LFPAK-56 is the correct form factor. It is the same fet richard uses on his MTN dd17 and other drivers.

luminarium iaculator
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nofearek9 wrote:
http://www.ebay.com/itm/2pcs-New-NXP-4O30AL-403OOAL-4O3OAL-PH-4030AL-PH4...

 

That looks just like one I have. Guys I don't know even what FET is Smile but I know how to build this driver(thanks to Djozz) so I really don't know what would be better.

What to choose?

MTN: http://www.mtnelectronics.com/index.php?route=product/product&path=25_76...

Or Ebay one: http://www.ebay.com/itm/2pcs-New-NXP-4O30AL-403OOAL-4O3OAL-PH-4030AL-PH4...

 

I mean if I need to solder differently than mentioned on this thread than it can be problem?

 

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Just trying to make the Fet driver from a AK47a, could anyone help me with the connections ? Is there any schematic ? :/

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Small group of Djozz FET army soldiers is ready to take flashlight hosts

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giorgoskok wrote:
Just trying to make the Fet driver from a AK47a, could anyone help me with the connections ? Is there any schematic ? :/

I hoped that the original post was enough to make these. I will try making a more clear schematic.

 

Nice battery of drivers, l.a. ! I would never have thought that these would have been made in such numbers Smile

 

Just today I made a AK-47-A +FET driver for a Brynite B158 pill, the led is an Oslon Black Flat, that draws 3.8A on a 30Q. I tested this small 1x1mm die led today, and although it tested really impressive, in the Brynite I get 'just' Wink 285kcd throw, where I hoped for close to 400. Apparently a 1x1mm die is not imaged well enough, too small for the Brynite lens.

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It seems that no led can dethrone mighty XP-G2 S4 2B Smile 285 kcd for B158 is really low no matter how funny it sounds Smile . It is an exceptional flashlight. But now we know which led we should stick to.

In fact I done about 60 of them. They are running without issues in plenty of flashlight hosts. I just got inspiration with new batch so I just wanted to show you some, and I think I am not the only one that is doing them. You managed to spread this FET virus around the globe Smile

When I saw this thread I asked myself: " jerk why the hell are you loosing time on stacking chips? Try that cause this Djozz guy really knows the modding stuff..." , and when I done few of them I realized that in fact you are one incredible guy cause you unselfishly show me how to make perfect driver for my needs.

 

 

 

vjik
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So what is the best board now for this kinda mod?
Link PLs. Thank U

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vjik wrote:
So what is the best board now for this kinda mod? Link PLs. Thank U

Any of the AK-47 boards will work, for sale at DX, Banggood,  or anywhere. I like the AK-47-C1 because it has no mode memory and starts on low: http://m.banggood.com/Wholesale-AK47C-Mode-Circuit-Board-Without-Memory-...

vjik
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djozz wrote:

vjik wrote:
So what is the best board now for this kinda mod? Link PLs. Thank U

Any of the AK-47 boards will work, for sale at DX, Banggood,  or anywhere. I like the AK-47-C1 because it has no mode memory and starts on low: http://m.banggood.com/Wholesale-AK47C-Mode-Circuit-Board-Without-Memory-...

Is it possible to make it starts on Turbo/HI?

luminarium iaculator
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I got to tell that with last BG order I ordered 20 AK47 C1 driver and I got mixed order! They send me 10x AK47 C1 and 10x nanjg rohs 111 (1050mah) which is the crappiest single mode driver I ever seen. After paypal fight they refunded half of the money.

At start they did not wanted to refund claiming that nanjg 111 rohs is new version of AK47c1 Smile

This is how rohs looks except I got with 3 amc7135 chips:

 

So maybe we need to start finding that on other sources (KD, DX, ali or other...)

I simply can't trust them after this incident.

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luminarium iaculator wrote:

I got to tell that with last BG order I ordered 20 AK47 C1 driver and I got mixed order! They send me 10x AK47 C1 and 10x nanjg rohs 111 (1050mah) which is the crappiest single mode driver I ever seen. After paypal fight they refunded half of the money.

At start they did not wanted to refund claiming that nanjg 111 rohs is new version of AK47c1 Smile

This is how rohs looks except I got with 3 amc7135 chips:

 

So maybe we need to start finding that on other sources (KD, DX, ali or other...)

I simply can't trust them after this incident.

Ai, just last night I ordered 5 AK-47-C1 drivers from BG. I will prepare for battle Frown.

luminarium iaculator
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Maybe you'll be more lucky. They had good drivers until last order. Their drivers are with this mode order high-med-low without memory effect. DX are lo-mid-high without memory effect.

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djozz wrote:

luminarium iaculator wrote:

I got to tell that with last BG order I ordered 20 AK47 C1 driver and I got mixed order! They send me 10x AK47 C1 and 10x nanjg rohs 111 (1050mah) which is the crappiest single mode driver I ever seen. After paypal fight they refunded half of the money.

At start they did not wanted to refund claiming that nanjg 111 rohs is new version of AK47c1 Smile

This is how rohs looks except I got with 3 amc7135 chips:

 

So maybe we need to start finding that on other sources (KD, DX, ali or other…)

I simply can’t trust them after this incident.

Ai, just last night I ordered 5 AK-47-C1 drivers from BG. I will prepare for battle Frown.

Ordered too , will be back in stock at 01-30-2016

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Which of the 2 following would work ? In case banggood drivers are over.
I think the first will be ok but i don’t know about the second one :

1) https://www.fasttech.com/products/1122400
2) https://www.fasttech.com/products/1124801

vjik
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Today i ordered 3 from BG

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