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  • Welcome to our site! Electro Tech is an online community (with over 170,000 members) who enjoy talking about and building electronic circuits, projects and gadgets. To participate you need to register. Registration is free. Click here to register now.

Recent content by Tip-C

  1. T

    Fixing a battery charger.

    damn...are you serious? Hmmm any ideas on what the specs for that circuit might be?
  2. T

    Fixing a battery charger.

    WOW...Great Explanation. Truly appreciated! I will try to get the part on Friday and I will let you know how it goes! Thanks again.
  3. T

    Fixing a battery charger.

    Here is some information provided on the back of the charger: Class 2 Battery Charger MODEL: CHM4AA INPUT: 120V AC 60Hz 4.6W OUTPUT: AA- 2 x (2.8V DC 150mA) AAA-2 x (2.8V DC 16mA) 9V cell-2 x (9.0V DC 16mA) Charging Time: 15 hours by timer control.
  4. T

    Fixing a battery charger.

    can anybody else point me into the right direction on this one? Thanks
  5. T

    Fixing a battery charger.

    Yes the charger works in pair...you have to charge either two batteries on the left or on the right. Sorry, i knew this before, i guess i forgot to mention it. When you put it 2 batteries it closes the circuit and lights up the LED. Im just not sure if this applies for the 9V batteries as i...
  6. T

    Fixing a battery charger.

    I tried what you said but no luck. I guess the damage must be internal. My best bet would be just to replace the transformer! Then again....what i need to know is the specs of this transformer? More precisely, the output specs!:confused:
  7. T

    Fixing a battery charger.

    Resistance between white windings: 37ohms Resistance between red windings: 7ohms Resistance on primary winding could not be measured as there is no continuity. All wires have continuity with the black one. NOTE: I measured using a multi-meter directly on the circuit board and using the...
  8. T

    Fixing a battery charger.

    The cap is a 100 microfarad with a voltage of 25V. Here is some additional info that might help. There are 5 wires on the output of the transformer... 2 white, 2 red and a black. the two red go to each extremity of the circuit board where they then each go into a IN400 DC Diode which...
  9. T

    Fixing a battery charger.

    Hello, I have some limited knowledge of electronics, thus im here to ask for help. I have a normal Ni-Mh battery charger capable of charging AA, AAA and the 9V rectangular batteries. After doing a few tests with a multi meter, i came to the conclusion that the Transformer inside is...

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