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View Poll Results: Which board would you like?

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  • 1AA NiMH with strobe

    33 16.10%
  • 1AA NiMH without strobe

    75 36.59%
  • 3.7V Li-Ion with strobe

    63 30.73%
  • 3.7V Li-Ion without strobe

    78 38.05%
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Thread: FS: Microprocessor controlled drivers

  1. #31

    Default Re: Microprocessor controlled 4-mode driver boards

    RV7,

    On the 3.7v version, what would be the min/max input voltage?

  2. #32
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    Default Re: Microprocessor controlled 4-mode driver boards

    I'm not a pro in electronics, so could you please
    explain to us the pros/cons of MOSFET and PWM
    and their differences between "IC-regulating" ?

    For the price, interested for sure !
    Also, the thinner the boards, the better.
    (Single cell) Flashlighs are made small and have
    very limited real-estate.

    I would like to see a driver able to handle 750~1000mA
    from either a 3.0v and 3.7v cell.

    How tall is your tallest component and what is
    the thinnest assembly you can make ?

  3. #33
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    Default Re: Microprocessor controlled 4-mode driver boards

    Please keep the original modes (100% - 25% - 10% - Strobe)
    They are perfect.
    sskyy

  4. #34
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    Default Re: Microprocessor controlled 4-mode driver boards

    Interested even though those are mighty tall drivers for modding smaller sized flashlights???? But yet, So when the Q & A ends and there is a product to be had............. Paypal is impatiently waiting to be sent! I mean patiently waiting, of course!


    Thanks
    Ken
    Last edited by kenster; 06-05-2007 at 05:17 AM.

  5. #35
    Flashaholic* StefanFS's Avatar
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    Default Re: Microprocessor controlled 4-mode driver boards

    Quote Originally Posted by liquidsix View Post
    From what I've read in a bunch of threads, a lot of people want a light that comes back on in the stage you left it at. I'm definitely one of those people, so I vote for no default.
    Definately a good idea with no default. And please keep the strobe, which can be useful in an emergency.
    Stefan

  6. #36
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    Default Re: Microprocessor controlled 4-mode driver boards

    Can these be operated with a momentary switch like the bFlex? Or do you need a clunky on/off or twisty switch?
    If momentary -i buy a bunch of both -any configuration.

    Cheers
    Dom

  7. #37
    Flashaholic RV7's Avatar
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    Default Re: Microprocessor controlled 4-mode driver boards

    Quote Originally Posted by davenlei View Post
    RV7,

    On the 3.7v version, what would be the min/max input voltage?
    It works in the full voltage range of a single 3.7V Li Ion battery, from 4.2V to as low as 2.5V (Edit: Must correct myself. Should be 4.2v to around 3.1v. Below 3.1V the output is too low. Anyhow a normal Li-Ion loses almost all of its juice at 3.2V.) The output will decline when the battery gets low. But I find I'm quite comfortable with that because when I notice the output decline, I know I'll still have quite some time of useful output before the battery dropps too low. So I don't need to worry about a sudden death of the light. Also I can safely use unprotected batteries.

    I'm also considering another driver board that provides a true flat output of 1A, even when the battery is only 2.5V. But this raises some concerns. First it mandates the use of protected battery or you risk over discharge your battery easily. Second if protected batteries are used and when the low voltage protection kicks in, the flashlight will die suddenly, leaving you in the darkness unprepared. This can be disastrous when you're exploring a cave or haunted house So I'm thinking the first driver is more practical.
    Last edited by RV7; 06-05-2007 at 10:41 PM.

  8. #38
    Flashaholic RV7's Avatar
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    Default Re: Microprocessor controlled 4-mode driver boards

    Quote Originally Posted by joedm View Post
    what a shame that you've given up on the strobe. This would've been really useful to modify my current lights so that I could use them as strobe while riding my bike.

    Oh well.. I'll keep checking in case you decide to include it again.
    Looks like I'll have to program a few boards with strobe to keep you happy. Do you want the AA or 3.7V version?

  9. #39
    Flashaholic RV7's Avatar
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    Default Re: Microprocessor controlled 4-mode driver boards

    Quote Originally Posted by dom View Post
    Can these be operated with a momentary switch like the bFlex? Or do you need a clunky on/off or twisty switch?
    If momentary -i buy a bunch of both -any configuration.

    Cheers
    Dom
    It should work with any switch.

  10. #40
    Flashaholic RV7's Avatar
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    Default Re: Microprocessor controlled 4-mode driver boards

    Quote Originally Posted by bombelman View Post
    I'm not a pro in electronics, so could you please
    explain to us the pros/cons of MOSFET and PWM
    and their differences between "IC-regulating" ?

    For the price, interested for sure !
    Also, the thinner the boards, the better.
    (Single cell) Flashlighs are made small and have
    very limited real-estate.

    I would like to see a driver able to handle 750~1000mA
    from either a 3.0v and 3.7v cell.

    How tall is your tallest component and what is
    the thinnest assembly you can make ?
    PWM is turning the light on and off quickly and by controlling the proportion the light is on in each cycle you get different levels of output. If the PWM frequency is too low, it can be noticed and annoying. Now the mainstream frequency is about 100Hz. But mine is 5KHz, absolutely not noticeable to the naked eyes.

    You can think of a MOSFET as a slick switch with gold coated contacts. On the other hand a transistor is like a switch with sticky and uncoated contacts. I'm using MOSFET in both the 1AA step up circuit and the PWM circuit.

    To clarify, the first kind of the 3.7V boards I mentioned above doesn't use MOSFET because the driver IC has a control pin that requires little current thus can be connected directly to the output pin of the PWM processor. But 3.0V is already at the declining part of the output chart of this board so it's not suitable for 3.0V batteries.

    edit: The board sizes are listed in the first post. The 1AA version is a little taller due to the special inductor needed to achieve the high output.
    Last edited by RV7; 06-05-2007 at 09:55 AM.

  11. #41
    Flashaholic RV7's Avatar
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    Default Re: Microprocessor controlled 4-mode driver boards

    Ken, that's quite encouraging. Thanks!

    Now I almost feel obligated

  12. #42

    Default Re: Microprocessor controlled 4-mode driver boards

    Rv7,

    Ok, so the 3.7 version will run at 2.5-4.2v. If I apply a little too much voltage (4.5-4.7v) will it just go out of regulation until it reaches 4.2v and then pop back into regulation? Or will it just fry the board?
    Also, will you offer different outputs of the board like a 1.1a output version?

  13. #43
    Flashaholic* Krit's Avatar
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    Default Re: Microprocessor controlled 4-mode driver boards

    It's very interesting. I like start from low to high mode. Can we adjust it's brightness in each stage? If price is resonable, please put me in line for some of AA type.

  14. #44
    Flashaholic RV7's Avatar
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    Default Re: Microprocessor controlled 4-mode driver boards

    Quote Originally Posted by davenlei View Post
    Rv7,

    Ok, so the 3.7 version will run at 2.5-4.2v. If I apply a little too much voltage (4.5-4.7v) will it just go out of regulation until it reaches 4.2v and then pop back into regulation? Or will it just fry the board?
    Also, will you offer different outputs of the board like a 1.1a output version?
    I tried 8V and it got warm, which is an indication of poor efficiency, but didn't fry. The output is still very well regulated. It's recommended to use the board with a single 3.7 batt, when it's the most efficient.

    The driver, thus max output, can't be configured. Only the PWM can be programmed.
    Last edited by RV7; 06-05-2007 at 12:00 PM.

  15. #45
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    Default Re: Microprocessor controlled 4-mode driver boards

    My vote would be for either "high, med, low" or "med, low, high" with low at 10% or less (preferably ~5%). I also tend to prefer a default mode so that I know what level it will be when I turn it on instead of being surprised because I forgot the last level it was at. Ideally the default would be either high or med - if I need low I usually have the time to click a few more times to get it (ie., i usually don't need low for an emergency situation).

    It gets complicated when you try to please people doesn't it
    Either way, I'm very interested in the final product, and if you decide to do a 2AA version I'd probably be in for one of those as well, especially if it will fit in a minimag or fenix.
    Last edited by PhotonAddict; 06-05-2007 at 10:55 AM.

  16. #46
    Flashaholic RV7's Avatar
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    Default Re: Microprocessor controlled 4-mode driver boards

    repost.
    Last edited by RV7; 06-05-2007 at 12:24 PM.

  17. #47
    Flashaholic RV7's Avatar
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    Default Re: Microprocessor controlled 4-mode driver boards

    Thanks mods for moving this thread to where it should be! I should have realized it earlier. My apologies.

  18. #48
    Flashaholic* 2xTrinity's Avatar
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    Default Re: Microprocessor controlled 4-mode driver boards

    I'd be interested in either a 3.7V version of this driver. I'd love to have a pocketable flashlight that ran on a single 18500 LiIon -- essentially the same size as a 1xAA flashlight (only slightly thicker) but with a much higher capacity.

  19. #49

    Default Re: Microprocessor controlled 4-mode driver boards

    Hi, interested in li-ion version without strobe.

    Thanks.

  20. #50

    Default Re: Microprocessor controlled 4-mode driver boards

    Quote Originally Posted by RV7 View Post
    Second if protected batteries are used and when the low voltage protection kicks in, the flashlight will die suddenly, leaving you in the darkness unprepared. This can be disastrous when you're exploring a cave or haunted house So I'm thinking the first driver is more practical.
    Exactly
    I'll take 5 of the AA 3% - 20% - 60% - 100% (no strobe)

  21. #51
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    Default Re: Microprocessor controlled 4-mode driver boards

    Quote Originally Posted by RV7 View Post
    Ken, that's quite encouraging. Thanks!

    Now I almost feel obligated
    If you need someone to try out some drivers, I will buy whatever you have!

    Ken

  22. #52
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    Default Re: Microprocessor controlled 4-mode driver boards

    Quote Originally Posted by RV7 View Post
    It should work with any switch.
    Hi RV7
    Sorry -i really wanted to know if it needed a latching switch to stay on.I'm still a learner as to how things work.
    There was some discussions i was following where you needed some extra circuitry to use a momentary switch.
    Thanks
    Dom

  23. #53
    Flashaholic RV7's Avatar
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    Default Re: Microprocessor controlled 4-mode driver boards

    Quote Originally Posted by dom View Post
    Hi RV7
    Sorry -i really wanted to know if it needed a latching switch to stay on.I'm still a learner as to how things work.
    There was some discussions i was following where you needed some extra circuitry to use a momentary switch.
    Thanks
    Dom
    Hi Dom,

    Now I get it. I guess you're talking about the kind of circuit that's ALWAYS on and the momentary switch doesn't control power directly. Instead it only sends a signal to the circuit. Unfortunately my board is not designed to work that way.

  24. #54
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    Default Re: Microprocessor controlled 4-mode driver boards

    REally looking forward the end-result.

    However, you should know that current boards are 0.55" and
    most, if not all Light Engine builds for Aleph and a few custom Surefire
    use a "can" which can only house a 0.55" board...

    (17mm can still be used but would require a custom assembly...)

  25. #55
    Flashaholic RV7's Avatar
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    Default Re: Microprocessor controlled 4-mode driver boards

    I've decided to use a new higher performance Li-Ion driver. It's extremely effecient, has a very flat output while at the end still offering a long gradual declining period. I was surprised last night by how bright a Cree is even at 6mA! You can run the light for hours at that level without over discharging the battery.

    Edit: Details of the driver can be found in the first post. It costs a little more.
    Last edited by RV7; 06-06-2007 at 08:49 AM.

  26. #56

    Default Re: Microprocessor controlled 4-mode driver boards

    I am intrested in a few of the AA 3% - 20% - 60% - 100% (no strobe) boards.

    3-5pcs i think
    My Flashlights
    Elektrolumens Blaster 1R, Cree w/optics | Elektrolumens Blaster 1R, S-bin w/IMS27 | Blaster V | Blaster 3P, U-bin | DX Elly, Cree w/optics | Elektrolumens Lucidus XR-2
    Fenix L1D CE | Ultrafire WF-602A | Ultrafire WF-602A1 | PT Apex, Seoul P4 | DX Lyckeby, R/O Lux1 w/optics | DX Lyckeby | Lots of other stuff i dont remember right now...

  27. #57
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    Default Re: Microprocessor controlled 4-mode driver boards

    Put me on the list for 2 of the boards for li-on use. One non-adjustable and one that is variable with resistor.

  28. #58

    Buttrock Re: Microprocessor controlled 4-mode driver boards

    Hi RV7,

    I have been looking for a 1AA board with variable output for quite some time. I congratulate you for making such a driver.

    I would be in for 3 to 5 AA and 3.7V boards with mode A. I would most likely be interested in the 18x7mm 3.7V boards.

    Sounds like this will be a fantastic product

    Regards, Artisan Bill

  29. #59

    Default Re: Microprocessor controlled 4-mode driver boards

    I'm in for three 1AA baord (2 with strobe, 1 without) and four 18mm 3.7V Li-Ion board (2 with strobe and 2 without).

    Thanks.

  30. #60
    Flashaholic* H22A's Avatar
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    Default Re: Microprocessor controlled 4-mode driver boards

    I'm interested in 5 x 1AA 3% - 20% - 60% - 100% (no strobe). Thanks.
    If you have any questions, please contact me at nongvol1@truemail.co.th

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