18F4550 Solar battery charger / regulator & inverter system

Closed Thread
Results 1 to 15 of 15

Hybrid View

  1. - 26th February 2008, 16:03 #1
    RYTECH's Avatar
    RYTECH
    RYTECH is offline Junior Member
    Join Date
    Jul 2005
    Posts
    93

    Did you find this post helpful? Yes | No

    Lightbulb

    I dug up my notes for some of the stuff I'd been researching last summer for charging batteries and came across notes for the texas instruments UC3906/2906, i think it would be better than the linear regulator/resistor combo for charging so I'm posting the data sheet in case anyone wants to look at it with me... actually the data sheet won't upload but I did post another document I found on the 2906/3906

    The data sheet is pretty straight-forward... although I'm having some difficulty determining the resistor values necessary to indicate to the charger ic the bulk charge rate and for how many cells it's charging... maybe someone can make sense of it...
    Attached Images Attached Images
    Last edited by RYTECH; - 26th February 2008 at 16:07.
  2. - 26th February 2008, 16:13 #2
    Acetronics2's Avatar
    Acetronics2
    Acetronics2 is offline Fanatical Contributor
    Join Date
    May 2004
    Location
    NW France
    Posts
    3,653

    Did you find this post helpful? Yes | No

    Lightbulb

    May be you should have a look to AN U104 ... ( U for UNITRODE )

    where it is clearly explained ... with the scheme ( ! )

    Alain
    Last edited by Acetronics2; - 26th February 2008 at 16:17.
    ************************************************** ***********************
    Why insist on using 32 Bits when you're not even able to deal with the first 8 ones ??? ehhhhhh ...
    ************************************************** ***********************
    IF there is the word "Problem" in your question ...
    certainly the answer is " RTFM " or " RTFDataSheet " !!!
    *****************************************
  3. - 26th February 2008, 17:01 #3
    RYTECH's Avatar
    RYTECH
    RYTECH is offline Junior Member
    Join Date
    Jul 2005
    Posts
    93

    Did you find this post helpful? Yes | No

    Default

    Thanks I've posted that document in case others wish to review it.
    Attached Images Attached Images
  4. - 12th March 2008, 21:53 #4
    jcdillin's Avatar
    jcdillin Guest

    Did you find this post helpful? Yes | No

    Default

    Are you still working on this?


    Right now i'm working on getting the parts together to start a small solar power system for my shed. At least give me lighting and some ventilation fans. I already have a few of the high power chips from allergo for reading amperage from the batteries and the panels. I am starting to work on the schematics and deciding which pic I want to go with. I would be interested in working more on this.

    Jerry
  5. - 13th March 2008, 08:16 #5
    sayzer's Avatar
    sayzer
    sayzer is offline SuperMod
    Join Date
    Jan 2006
    Location
    Istanbul
    Posts
    1,185

    Did you find this post helpful? Yes | No

    Default

    RYTECH,

    Do you need the solar panels ONLY for charging?
    I did not get it clear enough with the posts above.


    ---------------
    "If the Earth were a single state, Istanbul would be its capital." Napoleon Bonaparte
  6. - 23rd March 2008, 16:10 #6
    RYTECH's Avatar
    RYTECH
    RYTECH is offline Junior Member
    Join Date
    Jul 2005
    Posts
    93

    Did you find this post helpful? Yes | No

    Default

    Hi people... sorry for the delayed response, i've gotten somewhat sidetracked designing a perpetual motion machine...lol...

    as for the power system.. I would like it to a) recharge the batteries and b) supply the load with any additional unused power from various input sources...
  7. - 6th March 2011, 05:08 #7
    ofuzzy1's Avatar
    ofuzzy1
    ofuzzy1 is offline Junior Member
    Join Date
    Feb 2011
    Posts
    26

    Did you find this post helpful? Yes | No

    Default Re: 18F4550 Solar battery charger / regulator & inverter system

    NEWARK and MOUSER sell the PB137 it is a 13.7V version of the 7815.

    13.7V is the perfect voltage for Sealed Batteries, you NEVER EVER WANT TO OVER CHARGE THEM 14.1V is the absolute max.

    GEL CELLS will never heal from overcharging, the bubbles form and push the mat away from the plate, the bubbles do not dissolve or move.

    I like your idea, you could measure the amount of current flowing IN to the batteries if they are not receiving then you can by pass shunt off the excess.

    On ebay many folks are sellling dc-dc converters, you can use these to stabilize the power from the panels
« Previous Thread | Next Thread »

Similar Threads

  1. Charger battery with pic12f675
    By Leonardo in forum mel PIC BASIC Pro
    Replies: 4
    Last Post: - 24th July 2009, 19:15
  2. Li-Ion battery charger
    By Nicmus in forum Off Topic
    Replies: 6
    Last Post: - 21st May 2008, 00:28
  3. PIC16F877A - Timer0 won't interrupt
    By WishMaster^ in forum mel PIC BASIC Pro
    Replies: 19
    Last Post: - 25th April 2007, 08:25
  4. calibration clock 12f508
    By volcane in forum mel PIC BASIC Pro
    Replies: 13
    Last Post: - 5th December 2006, 10:33
  5. 12v Lead acid solar charger
    By docwisdom in forum mel PIC BASIC Pro
    Replies: 0
    Last Post: - 26th May 2006, 22:01

Members who have read this thread : 0

You do not have permission to view the list of names.

Bookmarks

Posting Permissions

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

Forum Rules