Suitable TaskLED b3flex substitute- Mtbr.com
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  1. #1
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    Suitable TaskLED b3flex substitute

    Hi!

    I have been hanging around here for a while, but this is my first post.

    I'm currently having a project in school were I'm supposed to design and make bike light. So, now I'm on the hunt for a suitable driver for my this build. The light will come from 3 XM-L2 U3 emitters on 20 mm MCPCB's. My plan was to use the b3flex driver provided by Taskled, but as it seems now, it won't be in stock until early march and that doesn't include the shipping from the US to Sweden... I can't just wait that long for it to arrive.

    I've also seen that Cutter AU stocks it, but the shipping cost is horrible, and after reading some reviews it seems like you really shouldn't be in a hurry when ordering from them... So thats not an option for me.

    I will make the housing myself and can therefore adjust the size to suit the driver, but I'll try to make it as small as possible. The battery will be chosen to suit the driver, so both buck- and boost drivers could be of interest.

    Do you guys have any suggestions for a driver that suits my needs? I'll be more than happy for any kind ideas that could get this project moving.

  2. #2
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    Quote Originally Posted by jonatanostlund View Post
    Hi!

    I have been hanging around here for a while, but this is my first post.

    I'm currently having a project in school were I'm supposed to design and make bike light. So, now I'm on the hunt for a suitable driver for my this build. The light will come from 3 XM-L2 U3 emitters on 20 mm MCPCB's. My plan was to use the b3flex driver provided by Taskled, but as it seems now, it won't be in stock until early march and that doesn't include the shipping from the US to Sweden... I can't just wait that long for it to arrive.

    I've also seen that Cutter AU stocks it, but the shipping cost is horrible, and after reading some reviews it seems like you really shouldn't be in a hurry when ordering from them... So thats not an option for me.

    I will make the housing myself and can therefore adjust the size to suit the driver, but I'll try to make it as small as possible. The battery will be chosen to suit the driver, so both buck- and boost drivers could be of interest.

    Do you guys have any suggestions for a driver that suits my needs? I'll be more than happy for any kind ideas that could get this project moving.
    That's a really tough one... although a bit expensive, TaskLED drivers are pretty much the best for DIY bike lights (used them in at least a dozen light builds myself). I assume H6flex would be too large for your project? How about Lflex?

    There are other drivers out there, but almost all are designed for flashlight applications which have a different method of mode switching (momentarily interrupting battery power) so I wouldn't recommend them for a bike light build.

  3. #3
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    Have a look at the Mobydrv by Dr Jones. I've bought a couple from him and he was responsive, fast and helpful. The driver is well priced as well for what it is - a dedicated and well thought out driver just for bike lighting.

    Savvas.

  4. #4
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    Last edited by jonatanostlund; 02-04-2016 at 05:44 AM. Reason: double posting

  5. #5
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    Last edited by jonatanostlund; 02-04-2016 at 05:43 AM. Reason: double posting

  6. #6
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    Quote Originally Posted by kwarwick View Post
    That's a really tough one... although a bit expensive, TaskLED drivers are pretty much the best for DIY bike lights (used them in at least a dozen light builds myself). I assume H6flex would be too large for your project? How about Lflex?

    There are other drivers out there, but almost all are designed for flashlight applications which have a different method of mode switching (momentarily interrupting battery power) so I wouldn't recommend them for a bike light build.
    Yeah, the H6flex would absolutely work, bit it's physical size is a bit ligger than optimal. And it seems like difference in amperage between the steps in the sub 3000 mA range would be a bit too large.

    As you mention, I've found lots of drivers that could suit the setup but doesn't seems to match the intended usage.

  7. #7
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    Quote Originally Posted by savvas View Post
    Have a look at the Mobydrv by Dr Jones. I've bought a couple from him and he was responsive, fast and helpful. The driver is well priced as well for what it is - a dedicated and well thought out driver just for bike lighting.

    Savvas.
    I took a quick look at his page, and he seemed to have a couple of interesting options for this build. I'll definitely contact him to see which one he thinks is best for the job.

    Thanks!

  8. #8
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    Looks like Mobydrv is a custom firmware version of the very common nanjg 105c flashlight driver that uses 8 x 7135 linear regulators.

    The problem I see is it is intended to drive a single 3V LED from a single Lithium cell... a typical flashlight configuration, but not really suitable for the OP's purpose of driving a 3up XM-L2 board.

  9. #9
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    Yes - I think you may be correct kwarwick. He could use 3 of them of course for flexibility, and I understand that they can even be used in a master/slave configuration, although I'm not sure how...

    jonatanostlund - I've had very good dealings with Mark at Cutter. He has always been very helpful and responsive and I've rec'd parts very promptly. If he's got what you need then I wouldn't hesitate in purchasing from him. Post costs from Australia are likely to be far less than US which are frightful!

    Savvas.

  10. #10
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    I just built two lights with the ld-m(2) drivers, they are more difficult to solder to, but work well. I got them very quickly here in Europe.

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