Direct drive 17mm driver from Fasttech

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marcl
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Direct drive 17mm driver from Fasttech

Ok, so just a quick review on this:

https://www.fasttech.com/products/1114500

I bought a cheap C8 a while back but I was not too happy with it. The main reasons are, the fact that it had a plastic reflector but also a stupid next mode memory, disco, strobe the lot. It was so annoying not being able to turn it on high without going through the whole sequence.

So I went searching and found this driver, it was described as Direct drive but I’m not sure. When I asked the question what would DD pull from a cell with an XML, the answer ranged from 3.5A to 5A. Anyway this thing pulls nowhere near that, at least not 5A anyway. I got it mainly for the fact that, whilst it was still next mode memory it was only high and low, so no arsing around past strobe and SOS. Just high and low, perfect!

The measurement are as follows: LOW HIGH

Trustfire Flame 0.89A 2.5A

Sanyo 2600mah 0.99A 3A

Whilst taking the tail cap readings I also noticed it is LAST mode memory, so that’s a bonus!

My conclusion is that this good little driver, at $1.81 it’s cheap as chips and works well and at 3A you could not task for more really. It would make a good cheap alternative to the AMC 7135 drivers and half the price. I love it.

I must also apologise, but I do not have a good enough camera to take beam shots, but you the important stuff is there, above.

Thank you for reading and I hope this helps,

Marc.

Eagles may soar, but weasels don't get sucked into jet engines!

keltex78
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Your direct drive current is going to depend a lot on the resistance of the circuit and the health of the cell you are using. I had (notice I say "had") a cheap blue Ultrafire 18650 and it could only provide low current levels, even in direct drive. I also have a number of Sanyo laptop-salvage cells that can provide 4+ amps when freshly charged in the same light. Other factors that can affect the tailcap current readings are emitter lead sizes and dirty threads on the light.

Does this driver have visible PWM on low? If not, this would be an awesome driver for an XR-E/Aspheric light...


Keepin’ the “B” in BLF

Don wrote:
It sounds like the XM LEDs won’t really be suitable for flashlight use. Pity…

nofearek9
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driver is similar to the HD2011 which drives 2a max

marcl
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keltex78 wrote:

Your direct drive current is going to depend a lot on the resistance of the circuit and the health of the cell you are using. I had (notice I say “had”) a cheap blue Ultrafire 18650 and it could only provide low current levels, even in direct drive. I also have a number of Sanyo laptop-salvage cells that can provide 4+ amps when freshly charged in the same light. Other factors that can affect the tailcap current readings are emitter lead sizes and dirty threads on the light.

Does this driver have visible PWM on low? If not, this would be an awesome driver for an XR-E/Aspheric light…

I will check for the PWM. What is the best way to check? Also I have made sure all threads are clean and the cells are new (they’ve only done about 10 cycles) Both Trustfires and Sanyo’s. It’s a good little driver.

Marc.

Eagles may soar, but weasels don't get sucked into jet engines!

keltex78
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Easy way: Shine the light in the shower and see if you see the water as steady streams or sparkling droplets...

Or shine it on fan blades to see if you notice a pattern...


Keepin’ the “B” in BLF

Don wrote:
It sounds like the XM LEDs won’t really be suitable for flashlight use. Pity…

marcl
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keltex78 wrote:

Easy way: Shine the light in the shower and see if you see the water as steady streams or sparkling droplets…

Or shine it on fan blades to see if you notice a pattern…

Yes there is, but it is not as bad as my Solarforce XPG, the droplets appear much smaller with the XPG drop in, so you can make your own mind up there I’m afraid.

By the way I recharged my Sanyo as it was reading 4.16v. I took it off at 4.22v and it now pulls 3.1A. Not a lot of difference but I thought I would mention it.

Marc.

Eagles may soar, but weasels don't get sucked into jet engines!

keltex78
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I think I'll drop a couple of these on my next order for testing then. Sounds like it might make a good driver for a C8-type light since it's a fairly high Low mode but can be bumped up to Turbo if needed.


Keepin’ the “B” in BLF

Don wrote:
It sounds like the XM LEDs won’t really be suitable for flashlight use. Pity…

marcl
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keltex78 wrote:

I think I’ll drop a couple of these on my next order for testing then. Sounds like it might make a good driver for a C8-type light since it’s a fairly high Low mode but can be bumped up to Turbo if needed.

Yes, The way I see it I do not want a C8 with a 200ma low. What’s the point? So 1A and 3A is perfect to me. By the way it is not last mode memory, it always comes on high. So even better!

Marc.

Eagles may soar, but weasels don't get sucked into jet engines!

Werner
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I wondered why there is a eeprom on that driver?
k24c02d

marcl
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Werner wrote:
I wondered why there is a eeprom on that driver? “k24c02d”:http://www.alldatasheet.com/datasheet-pdf/pdf/223134/ESTEK/K24C020-DCR-A...

Me to, now you mention it! I may even be concerned about it if I new what one was. :bigsmile:

Marc.

Eagles may soar, but weasels don't get sucked into jet engines!

Werner
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Does your driver has a spring on the backside?
And had it presoldered wires?

Sirius9
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I found out that if you remove capacitor from that drives you will most likely get 1-mode driver, it will always start in high mode Smile

 

Werner
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Also mine has no low battery function.

OscarM
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i changed to this driver on my cheap, underdriven xr-e c8. couldn’t stand the next mode memory, and it was very boring when it was underdriven. now it’s much more useful when it’s only 2-mode!

apt323
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Used one of these in a build I like the direct drive part and then have another mode if you want it. No strobe no blinkies just good ole lumens in different doses…………. Mine pulled 1.3a on a green xre with long thin wires (was trying to be conservative) will shorten them and see if it pumps up the power.

Werner
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I have played around and this little beast pushes 5A through my testleds…
I have powered it with a power supply so no voltage sag…but it got hot and smelled a bit warm.

marcl
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Werner wrote:
Does your driver has a spring on the backside? And had it presoldered wires?

No spring and no wires, I’m afraid. But they were already on the torch.

Marc.

Eagles may soar, but weasels don't get sucked into jet engines!

marcl
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Sirius9 wrote:
I found out that if you remove capacitor from that drives you will most likely get 1-mode driver, it will always start in high mode Smile

It does start on high every time.

Marc.

Eagles may soar, but weasels don't get sucked into jet engines!

jakey
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This looks exactly the same as the one in my hd2011 GK003A7

let there b rock (i mean light)

marcl
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jakey wrote:
This looks exactly the same as the one in my hd2011 GK003A7

I think it must be, someone mention that earlier.

Marc.

Eagles may soar, but weasels don't get sucked into jet engines!

jakey
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marcl wrote:
jakey wrote:
This looks exactly the same as the one in my hd2011 GK003A7

I think it must be, someone mention that earlier.

Marc.


I musnt have read that Glasses

let there b rock (i mean light)

marcl
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jakey wrote:
marcl wrote:
jakey wrote:
This looks exactly the same as the one in my hd2011 GK003A7

I think it must be, someone mention that earlier.

Marc.


I musnt have read that Glasses

No probs, I do it all the time. Wink

Marc.

Eagles may soar, but weasels don't get sucked into jet engines!

weiser
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Werner wrote:
Also mine has no low battery function.

But it’s supposed to, right?

I’m looking for a driver like this but need the low discharge protection because it’s for a family member who will be running IMR.

jakey
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weiser wrote:
Werner wrote:
Also mine has no low battery function.

But it’s supposed to, right?

I’m looking for a driver like this but need the low discharge protection because it’s for a family member who will be running IMR.


Fastech website says it has but coulb like chinese lumens :exmark:

let there b rock (i mean light)

Sirius9
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marcl wrote:
Sirius9 wrote:
I found out that if you remove capacitor from that driver you will most likely get 1-mode driver, it will always start in high mode :)
It does start on high every time. Marc.

Have you measured how much seconds/minutes after power off it reverts to high mode?

thanks

 

OscarM
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Approximately 3 seconds

Sirius9
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and do you know is this time set by/in MCU, would it decrease if I add (or replace that 334/330Kohm) resistor on top of that capacitor (for faster discharge)?

 

OscarM
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If you add another, or replace with a lower value resistor the cap should discharge faster, and revert back to high mode faster.

Sirius9
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oh that's perfect :DI see some experimenting in near future Silly

(I just wish those hot air soldering stations were cheaper :/)

 

marcl
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OscarM wrote:
Approximately 3 seconds

+1.

It’s a good little driver. Even though it is DD it does not seem to draw too much, 3A is perfect and 1A on low. The thing I like so much is this simplicity. High or low, no nonsense. Wink

Marc.

Eagles may soar, but weasels don't get sucked into jet engines!

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I received mine yesterday, about 2 weeks after I ordered it.
Tested mine in combination with one XM-L.
Freshly charged batteries (AW 2600, protected and NCR18650B 3400) it pulls up towards 3,3A on the tail. When voltage is a bit lower it will soon be closer to 2,7A.
Mine is not regulated, that is for sure. I would expect higher current if it was direct drive though.
On low, mine pulls 0,7-0,5 depending on the battery voltage.
I have not tested it with cells that are quite low.
Mine have next memory mode. Sad Not a fan of that, but not that annoying when only having 2 modes.
Its a little delay when changing modes where the light is all the way off.
Its a slight “whine” on low (like a nanjg 105C on low, only different whine).
I have not checked out efficiency.
Mine came with spring and wires.

For the price, I cant complain. I did not have high expectations either. But it seems like there are variations out there on this driver.
Compared to the one marcl got its easy to see that its not the same. Low is lower on mine, and I have next mode memory.
Based on my first impressions, its a decent 2-mode driver for the price.

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