Maxpedition - Active Shooter Bag 4
Page 1 of 9 12345678 ... LastLast
Results 1 to 30 of 250

Thread: Really cheap true cc/cv usb charging board

  1. #1

    Default Really cheap true cc/cv usb charging board

    Hello everybody!


    I'm a new member in this community. I always liked flashlights but i was unaware that there were people addicted to them.


    I have a cheap 3xAAA flashlight that i modded with an R2 drop in. I use it all the time in my work (i'm a mechanical engineer and i work in a brick producing plant). The main feature is an adjustable magnetic base that allows me to attach it to any machine and point it anywhere.


    At this point i want to upgrade to something more bright, more reliable and with longer runtime, but i want to do it on a tight budget.


    I'm thinking of buying the ultrafire 501-B flashlight with the XM-L T6. I can get it for 14 USD in ebay.


    What made me open this thread was the charger. After googling a while, i'm convinced that i can have a very good charger for a very low price. I don't need a fancy cradle charger, or multi bay charger, just something that i can attach to a 18650 and charge it saflely acording to the cc/cv algorithm.


    I was going around the TP4054 IC, when i found this board:


    Ebay Item number: 330699360128



    It uses a TP4056 IC, has 1A output current, but can be adjusted to other currents by changing one resistor. It follows cc/cv algorithm. If i can charge a 18650 battery with a 1A current then this is pretty much plug and play.


    This leads me to my first question. Is it safe to charge a 18650 battery, let's say a 2500mAh with 1A current?


    On the other hand, if i connect this to an USB port (maximum output of 500mA) or a wall cell phone charger (also 500mA), then, even with this resistor setting, the current going to the battery will allways be lower than 500mA, right?


    Another issue is the battery temperature. On this board the monitoring of the battery temperature is disabled. I believe thats also true for the majority of the chargers out there, but still i have safety concerns. So i had an idea,and i would like to know your opinion. This chip as a built in thermal feedback, that regulates the charging current to prevent the die from overheating. I was thinking that if i place the battery on top of the chip while charging, and if by any reason it overheats then it will also heat the chip reducing the charging current. Will this work? Any of you guys have experience with this board or IC?



    Previously i was thinking of modding the flashlight so that the battery could be charged inside, but i'm not so sure now. Is it safe to charge the battery in a so tight sealed enviroment?


    This thread is mainly about the charger but please fell free to give me your opinion about the flashlight also.


    Thank you guys!


    Last edited by Norm; 03-26-2012 at 06:15 PM.

  2. #2
    Administrator Norm's Avatar
    Join Date
    Jun 2006
    Location
    Australia
    Posts
    9,238

    Default Re: Really cheap true cc/cv usb charging board



    Interesting item, I've never notice that module before. I've ordered few to play with.

    Cheers Norm

  3. #3
    Flashaholic* mvyrmnd's Avatar
    Join Date
    Sep 2009
    Location
    Victoria, Australia
    Posts
    3,312

    Default Re: Really cheap true cc/cv usb charging board

    Quote Originally Posted by litos View Post


    This leads me to my first question. Is it safe to charge a 18650 battery, let's say a 2500mAh with 1A current?


    Yes


    On the other hand, if i connect this to an USB port (maximum output of 500mA) or a wall cell phone charger (also 500mA), then, even with this resistor setting, the current going to the battery will allways be lower than 500mA, right?
    Yes


    Another issue is the battery temperature. On this board the monitoring of the battery temperature is disabled. I believe thats also true for the majority of the chargers out there, but still i have safety concerns. So i had an idea,and i would like to know your opinion. This chip as a built in thermal feedback, that regulates the charging current to prevent the die from overheating. I was thinking that if i place the battery on top of the chip while charging, and if by any reason it overheats then it will also heat the chip reducing the charging current. Will this work? Any of you guys have experience with this board or IC?
    I have no idea. I guess so. At 500mA, you'd need a really dodgy 18650 to be worrying about overheating. Buy quality cells and you won't have much to worry about.



    Previously i was thinking of modding the flashlight so that the battery could be charged inside, but i'm not so sure now. Is it safe to charge the battery in a so tight sealed enviroment?
    If the battery vents while charging, your sealed environment would be more like a pipe bomb. If you don't want your light to be waterproof, you can drill a venting hole in it to allow for safe charging.


  4. #4

    Default Re: Really cheap true cc/cv usb charging board

    Quote Originally Posted by Norm View Post
    Ive edited your eBay link, we don't allow direct links to eBay or dealer web sites, you may mention a dealer by name. Interesting item, I've never notice that module before. I've ordered a couple to play with.Cheers Norm
    Thanks norm! I read some rule about long links not being allowed, but i guess i missed that one about direct links to dealer web sites .
    Last edited by Norm; 03-26-2012 at 06:53 PM. Reason: Edit typo in quote. iPad autocorrect :(

  5. #5
    Flashaholic*
    Join Date
    Jul 2008
    Location
    Tucson, Arizona
    Posts
    824

    Default Re: Really cheap true cc/cv usb charging board

    Hmmm... Seems like a perfect board to use for my bluetooth headset, so I don't have to carry 2 chargers with me all the time (its charger charges at 200 mA, while my cell phone charger charges at 1A, and my external battery pack charges at 600mA). Swap the input connector with a micro USB, put a micro USB output, change the resistor, and voila, 1 less charger I have to carry.



    Now if I could find a 1.5v boost charger for charging at a constant 4.5/5v (lower current output, like 20mA would be fine, considering I usually charge my headset when I'm sleeping, and would also work great for my Ipod nano), I'd be ecstatic!

    I have soooo many AAA, AA, and D cell batteries that could benefit from a charger like that, considering I don't go through many batteries in my E01 (same battery for the last 6-8 months), or my E05 (still on its first battery, after about 2-3 weeks).
    Last edited by bstrickler; 03-27-2012 at 02:58 AM.
    Mag 1D, 2DL, 3DL, 6D hotwire+extension... Fenix E15... Surefire Z2, E1e, 6P, U2 modded with T5 XM-L... Just to name a few

  6. #6
    Flashaholic* mvyrmnd's Avatar
    Join Date
    Sep 2009
    Location
    Victoria, Australia
    Posts
    3,312

    Default Re: Really cheap true cc/cv usb charging board

    Quote Originally Posted by Norm View Post
    Interesting item, I've never notice that module before. I've ordered few to play with.

    Cheers Norm
    I just did the same

    cottonpickers uses the same IC in his USB chargers, and they work fantastically. If this is even half as good, for the money it'd be brilliant!

  7. #7

    Default Re: Really cheap true cc/cv usb charging board

    Quote Originally Posted by litos View Post



    On the other hand, if i connect this to an USB port (maximum output of 500mA) or a wall cell phone charger (also 500mA), then, even with this resistor setting, the current going to the battery will allways be lower than 500mA, right?

    You will have to lower the charge current to <500mA to be compatible, it wont limit current, other than to just shut off the port/trip a polyfuse.

  8. #8
    Flashaholic* mvyrmnd's Avatar
    Join Date
    Sep 2009
    Location
    Victoria, Australia
    Posts
    3,312

    Default

    Quote Originally Posted by CKOD View Post
    You will have to lower the charge current to <500mA to be compatible, it wont limit current, other than to just shut off the port/trip a polyfuse.
    I have one of cottonpickers chargers that uses the same IC.

    If I set it to 750mA, and plug it into a standard 500mA USB port, it simply charges at 500mA.

  9. #9

    Default Re: Really cheap true cc/cv usb charging board

    Quote Originally Posted by mvyrmnd View Post

    cottonpickers uses the same IC in his USB chargers, and they work fantastically. If this is even half as good, for the money it'd be brilliant!
    That's exactly what i thought. I was thinking of assembling a board like this, and then i found this one. I couldn't built it for this price myself.

  10. #10
    Flashaholic* Ctechlite's Avatar
    Join Date
    Dec 2004
    Location
    Philadelphia, PA
    Posts
    750

    Default Re: Really cheap true cc/cv usb charging board

    There are USB chargers that will output 2 amps. My wife uses one for her ipad.
    Cheers, Chris

  11. #11
    Administrator Norm's Avatar
    Join Date
    Jun 2006
    Location
    Australia
    Posts
    9,238

    Default Re: Really cheap true cc/cv usb charging board

    Has anyone received any of these charger boards yet?

    I have just received three, (yet to test them) I was interest in varying the current as stated in the auction, I'm unsure of the resistor to change. Three message to the seller so far no helpful reply one stating "change the resistor" but not tell me which resistor, one saying "it can't be done" which is wrong I'm sure and the final message asking if I want a refund.

    I'll post progress if any, currently waiting on a fourth reply but I'm not holding my breath for a sensible response.

    Norm

  12. #12
    Flashaholic
    Join Date
    Aug 2009
    Location
    Brisbane, Australia
    Posts
    219

    Default Re: Really cheap true cc/cv usb charging board

    Quote Originally Posted by Norm View Post
    Has anyone received any of these charger boards yet?

    I have just received three, (yet to test them) I was interest in varying the current as stated in the auction, I'm unsure of the resistor to change. Three message to the seller so far no helpful reply one stating "change the resistor" but not tell me which resistor, one saying "it can't be done" which is wrong I'm sure and the final message asking if I want a refund.

    I'll post progress if any, currently waiting on a fourth reply but I'm not holding my breath for a sensible response.

    Norm
    I received one yesterday. I myself have had no time to play either. Just checked the datasheet for the TP4056 IC it uses and have come to the conclusion what you are looking for is in the following pic.


  13. #13
    Administrator Norm's Avatar
    Join Date
    Jun 2006
    Location
    Australia
    Posts
    9,238

    Default Re: Really cheap true cc/cv usb charging board

    Quote Originally Posted by AmperSand View Post
    I received one yesterday. I myself have had no time to play either. Just checked the datasheet for the TP4056 IC it uses and have come to the conclusion what you are looking for is in the following pic.
    Thanks

    Norm

  14. #14
    Flashaholic
    Join Date
    Aug 2009
    Location
    Brisbane, Australia
    Posts
    219

    Default

    Sorry the pic looks a bit dodgy, iPhone at work wasn't exactly a great shot but gets the idea across.
    If my soldering iron and other gear hadn't been stolen from my car a few months ago I'd have had mine nice and functional as a charger for my 3100mah cells I use in my Fenix PD31/Eagletac D25LC2/Eagletac G25C2. Normally use a hobby charger at home. But this is great for laptop bag/at work without having to take a hobby charger everywhere.
    Thinking about getting some 18650 holders and building the USB module into it.
    Portable/safe Li-ion charger!!!!

  15. #15
    Administrator Norm's Avatar
    Join Date
    Jun 2006
    Location
    Australia
    Posts
    9,238

    Default Re: Really cheap true cc/cv usb charging board

    Quote Originally Posted by AmperSand View Post
    Thinking about getting some 18650 holders and building the USB module into it.
    Portable/safe Li-ion charger!!!!
    I have a Pila but I think I'll put a couple of boards into an old WolfEyes Charger just for the fun of the project.

    Norm

  16. #16
    Flashaholic* mvyrmnd's Avatar
    Join Date
    Sep 2009
    Location
    Victoria, Australia
    Posts
    3,312

    Default

    I've got a 2.5A 5V supply, I'm going to use two of these to refit a dead wf-188 to have two independent 1A channels :-)

  17. #17
    Flashaholic
    Join Date
    Aug 2009
    Location
    Brisbane, Australia
    Posts
    219

    Default Re: Really cheap true cc/cv usb charging board

    Just quickly rigged mine up to charge an 18650 with magnet connectors. I'm at work so I can't leave it complete at the moment but so far its gone from 4.05v (cell I have in my EDC) and its currently still in constant current stage and is upto 4.15v. Have a multimeter connected to see voltage on output to battery so I can monitor it. Its only going to my computer USB port, so its probably limited to around 500mA.
    Everything seems to be going ok. I might solder the leads I have with aligator clips (which I will use magnets with) to the board and use some clear heatshrink on the board and I think that may be good enough for portability, keeps the size small.

    All in all seems to be going quite well. Should be good to be able to top up my EDC's cell while sitting at my desk without having to lug around too much gear at all. Bargain for the price.

  18. #18
    Flashaholic
    Join Date
    Oct 2009
    Location
    Germany
    Posts
    387

    Default Re: Really cheap true cc/cv usb charging board

    The basic problem of this board is IMO if you are using this charger board on a USB port @1A you may destroy the power lines of the used USB power port. In general most USB ports are only capable driving 500mA as maximum current. There are on some devices "high power ports" but this is not specified in USB 2.0. Depending on the design of the USB power generation of the PC it may happen the fuse of the USB power line will be destroyed or the port electronics.
    Looking for Orange Surefire G2 Host. If you have one you don't like please PM me.

  19. #19

    Default Re: Really cheap true cc/cv usb charging board

    Just picked up a few of these as tinker boards, look like great fun little projects and great EDC backup chargers.

    One question I know I'll have is how to determine the value of the resister to change? I was thinking I might even solder in a second breadboard with a multi-position switch... but really I'm a "hack" when it comes to this stuff (I still like to play at tho!!!) and don't know how to determine that resister value... any help there would be fantastic!

  20. #20
    Flashaholic* bshanahan14rulz's Avatar
    Join Date
    Jan 2009
    Location
    Tennessee
    Posts
    2,790

    Default Re: Really cheap true cc/cv usb charging board

    Ebay link says :
    RPROG (k) IBAT (mA)
    30 50
    20 70
    10 130
    5 250
    4 300
    3 400
    2 580
    1.66 690
    1.5 780
    1.33 900
    1.2 1000


    That would be a good place to start, I reckon.

    Also, good find, can't wait to redo my old junked chargers :-)

  21. #21
    Flashaholic* mvyrmnd's Avatar
    Join Date
    Sep 2009
    Location
    Victoria, Australia
    Posts
    3,312

    Default

    Quote Originally Posted by WarriorOfLight View Post
    The basic problem of this board is IMO if you are using this charger board on a USB port @1A you may destroy the power lines of the used USB power port. In general most USB ports are only capable driving 500mA as maximum current. There are on some devices "high power ports" but this is not specified in USB 2.0. Depending on the design of the USB power generation of the PC it may happen the fuse of the USB power line will be destroyed or the port electronics.
    It's not that it will 'suck' 1A from a 500mA port... It'll just deliver 500 mA to the battery.

    I doubt there'd be any risk to a USB port.

  22. #22

    Default Re: Really cheap true cc/cv usb charging board

    Quote Originally Posted by bshanahan14rulz View Post
    Ebay link says:


    Thanks =)


    Quote Originally Posted by mvyrmnd View Post
    It's not that it will 'suck' 1A from a 500mA port... It'll just deliver 500 mA to the battery.

    I doubt there'd be any risk to a USB port.
    +1, there should likely be no risk to the port in 99.9% of the computers.

    IIRC some older designed ports (we're going back a few years here) would shut off entirely if it detected a current draw higher than it wanted to give (and 500ma was being optimistic for some of those older ports). Sometimes power cycling the computer was needed to reset the protection, sometimes just removing the load and waiting 20 secs would do it. bottom line, no damage to anything, worst case, no charge in the battery.

    Modern ports will typically just deliver the 500ma and give the charger the finger on the other half. Some will give more than 500ma

    USB 3.0 ports are spec'ed to 900ma, but will probably give it the full 1a.
    Last edited by spectrrr; 04-20-2012 at 10:29 PM.

  23. #23
    Flashaholic
    Join Date
    Aug 2009
    Location
    Brisbane, Australia
    Posts
    219

    Default


    In action and charging! Just made up some alligator clip leads and soldered them to the board and encased the board in clear heatshrink.
    Multimeter in line monitoring voltage for now.
    Going to order a few more for use with battery cradles and maybe voltage display. Adding a switch to change charge modes as mentioned previously would also be good! Cheap and effective.

  24. #24

    Default Re: Really cheap true cc/cv usb charging board

    Very nice! Can't wait for mine to arrive... might be a month from China

    I hadn't looked at the connector and just assumed that it was full size USB... mini USB makes it even smaller than had thought, now I can think of a few more chargers I could use these in......

  25. #25
    Flashaholic* mvyrmnd's Avatar
    Join Date
    Sep 2009
    Location
    Victoria, Australia
    Posts
    3,312

    Default

    My new rig



    The boards are in parallel from a 5v 2.5A power supply, and the carrier is MDF, timber screws and lots (read: a metric buttload) of hot glue and dodgy soldering.

    Either way, I now have a dual independent, 1A per channel, charger that actually fits my 32650's
    Last edited by Norm; 06-15-2013 at 11:34 PM.

  26. #26
    Flashaholic* mvyrmnd's Avatar
    Join Date
    Sep 2009
    Location
    Victoria, Australia
    Posts
    3,312

    Default

    As a side note...

    Has anyone noticed the boards getting properly hot while charging?

    The input voltage is 5.05V under the 2A load - I'm guessing this is a bit higher than the voltage would be if it were being fed USB power?

    It's the resistor that's getting toasty, it may just be shedding more due to the higher input voltage...

    EDIT: The answer is yes. Under a 1A load, my 2A iPad USB charger measured 4.75V.

    Also, conveniently, due to the way the input is wired, I can plug into one of the USB inputs and still charge both batteries In a pinch it'd be slow, but it's still work.
    Last edited by mvyrmnd; 04-21-2012 at 07:39 AM.

  27. #27
    Flashaholic* mvyrmnd's Avatar
    Join Date
    Sep 2009
    Location
    Victoria, Australia
    Posts
    3,312

    Default

    Follow up: the charger cooled down significantly as the cells voltage increased. I started the charge with the cells at 3.7V, so the charger was having to work harder to bring the input voltage down to the required charge voltage. Once the cells were at 4.0 - 4.1V the resistor was barely warm to the touch.

  28. #28

    Default Re: Really cheap true cc/cv usb charging board

    Nice looking little rig there mvyrmnd
    I've got a cheap Chinese universal charger which is just begging to be gutted and replaced with an IC I can actually trust without keeping one hand firmly gripped on the fire extinguisher.



    Ran across a few more models on the bay of e's today:


    Item # 270958278638 - 1a rated, same TP4056 IC, no USB port wired in, no LED wired in. Board is a slightly different size. Twice the $$ ... looks like it would be good for a DIY integration project, not so good for plug-n-play.


    Item # 160782678020 - 1.5a rated, 5.8-6v (but recommends 6v), almost the same board design as the one mentioned above, except this time its running TWO TP4056 IC's (still one output) and what looks like dual 1.6k resistors. Item description however is identical to much of the info from the original board, and doesn't seem to apply correctly to the new dual IC 1.5a designed board. going by the resistor tables, 1.6k would = ~750ma on a single IC, so it stands to reason that one each would = ~1.5a .... I don't know, anyone have thoughts on this one? Double the price at $6.... but tempting to get one to play around with.
    Item # 150795982222 from the same seller provides a much better detailed and clear picture of the board components.


    Item # 120898714536 - full size USB plug on it, board size looks to be quite about smaller.... but the picture is too small to see what kind of IC its using or any of its circuit designs... sold in pairs for $12 after shipping, so kind of an expensive experiment :/
    Last edited by spectrrr; 04-21-2012 at 08:59 PM. Reason: added one more item

  29. #29
    Flashaholic
    Join Date
    Aug 2006
    Location
    Nebraska
    Posts
    288

    Default Re: Really cheap true cc/cv usb charging board

    Updates anyone? Lets keep this cool thread alive...


  30. #30
    Administrator Norm's Avatar
    Join Date
    Jun 2006
    Location
    Australia
    Posts
    9,238

    Default Re: Really cheap true cc/cv usb charging board

    I've only gotten as far as post 23 and have charged half a dozen or so batteries, so far everything looks fine.





    Norm

Page 1 of 9 12345678 ... LastLast

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •