Holy moly it works.....it actually freakin works!

Discussion in 'The Projects Forum' started by jerseyguy1996, Apr 24, 2011.

  1. jerseyguy1996

    Thread Starter Active Member

    Feb 2, 2008
    206
    9
    I just wanted to post to give everyone that has helped me over the last few weeks a hardy THANKS! I finally got up the nerve to plug in my DIY 12V SLA battery smart fast charger that is based on the TI BQ2031 IC. To my astonishment there was no smoke, no sparks, no fire, not even a hum.

    This is by far the most complicated diy electronics project that I have ever undertaken. It is the first one that I ever tried that required me to design my own pcb, calculate out appropriate resistor values, and etch and drill my own pcb. After a few false starts (due to a bad connection between the battery and the board) the IC went into the battery pre-qualification mode before jumping into the fast charge mode. It was a great feeling watching the amp meter jump up to 2.5amps when the fast charge cycle kicked off. As you can see from the pictures I still have to put together an enclosure for it but right now I am just surprised at how enjoyable it can be to just stare at something as mundane as a battery charging up. Thanks again all!

    [​IMG]
    100_1856 by jg1996business, on Flickr


    [​IMG]
    100_1867 by jg1996business, on Flickr

    [​IMG]
    100_1870 by jg1996business, on Flickr

    [​IMG]
    100_1874 by jg1996business, on Flickr
     
    Last edited: Apr 24, 2011
  2. RFactor

    Active Member

    May 1, 2009
    33
    3
    Nice job! Nice looking PCB and of course, it's always nice when it works!
     
  3. beenthere

    Retired Moderator

    Apr 20, 2004
    15,815
    282
    Looks good and it works. Nothing is better than that.
     
  4. CDRIVE

    Senior Member

    Jul 1, 2008
    2,223
    99
    Hey, that looks professional! ;)
     
  5. jerseyguy1996

    Thread Starter Active Member

    Feb 2, 2008
    206
    9
    Thanks! I used the iron on toner transfer method for the etching and to apply a silk screen to the finished product. It made the placement of the components much easier.
     
  6. jerseyguy1996

    Thread Starter Active Member

    Feb 2, 2008
    206
    9
    Everyday I kick myself for not doing EE in college. Why in the world did I do finance? This stuff is so much more fun.
     
  7. DickCappels

    Moderator

    Aug 21, 2008
    2,654
    632
    Very clean traces as well. Congratulations on a beautiful project.
     
  8. jerseyguy1996

    Thread Starter Active Member

    Feb 2, 2008
    206
    9
    Thanks! I got lots of advice from members of this forum.:)
     
  9. nerdegutta

    Moderator

    Dec 15, 2009
    2,515
    785
    Really nice work.

    If you post schematic and partlist, maybe this could be in the completed project collection?
     
  10. jerseyguy1996

    Thread Starter Active Member

    Feb 2, 2008
    206
    9
    Absolutely I would love to! The schematic is actually TI's schematic on page 5 of this manual:

    http://focus.ti.com/lit/ug/sluu023b/sluu023b.pdf

    with some very minor changes (leaving out resistor R15 - R17 and using different resistor values for R2 and R3 due to a different thermistor than the one they used.) I can post the PCB artwork and partlist though. I labeled my partlist from mouser so that it would coincide with the labels on the schematic for ease of construction.
     
  11. steveb

    Senior Member

    Jul 3, 2008
    2,433
    469
    Shhhhh ! Were trying not to let too many people know that we get payed to play all day. ;)

    Nice work, by the way. :cool:
     
  12. jerseyguy1996

    Thread Starter Active Member

    Feb 2, 2008
    206
    9
    Thanks! I am looking forward to building off of the knowledge from this project for my next project.
     
Loading...