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Thread: 7.4v PCB Broken - Missing a resistor

  1. #1

    Default 7.4v PCB Broken - Missing a resistor

    Problem solved.

    So I was wiring up my Li-Ion battery pack, when I was done I took some readings with my multimeter, I can get 7.6v from the ends of the cells but the PCB output remained zero. I checked all my solder joints and they were all fine. I decided to take a look of the board and I noticed that one of the resistors was missing. Here's a pic of what I'm talking about;



    As you can see, the points of tin for the component are clean, and don't seem to have been ripped off. This in my opinion means that it is a manufacturing error.
    This board was bought from TCSS, the stock pic seems to be outdated.
    Does anyone know what is the resistance of the missing component? I can buy another resistor of course but I need to know the ratings

    Thanks..


    EDIT: Now that I look at it again, I see it's missing another one, R3 ?? Any help here?

  2. #2

    Default

    Plug it into your charger for a second or two. The PCB is shipped in a protected state, and it will not output power right away. It'll reset once you've applied current from the charger.
    We all have to start somewhere. The journey is all the more impressive by our humble beginnings.

    http://led.linear1.org/1led.wiz for the lazy man's resistor calculator!
    http://forums.thecustomsabershop.com...e-to-Ohm-s-Law for getting resistor values the right way!

  3. #3

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