(Topic ID: 29738)

12 volt down to 6.3

By FirstPinGLin2011

7 years ago

Topic Stats

  • 5 posts
  • 4 Pinsiders participating
  • Latest reply 7 years ago by FirstPinGLin2011
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    #1 7 years ago

    I have a 120 to 12 volt converter from a previous job that I would like to reduce further to 6.3 to check some faulty light sockets.
    Is it possible and if so how do you do it. In real lame terms please.

    #3 7 years ago

    Depending on what you're trying to test, you might be better off using a cheap continuity tester rather than trying to improvise a voltage source.

    That linear voltage regulator could work if the current you're driving is small (less than 160mA). However, it could still get very hot since you need to drop 5.7V across it and would be burning about 1W.

    If you're not that familiar with electronics and really need a voltage supply, you can get an AC/DC switching transformer from Radio Shack that puts our the correct voltage.

    EDIT: A single #44 bulb pulls 250mA. The LDO would be burning 1.4W, get very hot, and probably not last all that long without a heat sink. I'd recommend just putting a bulb in the socket and running a continuity test, or using a AC/DC supply rated to drive the current you need to supply.

    #4 7 years ago

    A better method would be to check for old wall plug-in transformers around your house that you no longer use, like from old cell phones. They might be 5-7 volts.

    #5 7 years ago

    Thanks for the replies.
    I have checked continuity and it says fine but when you play a game they will go in and out.

    So when you grab hold of a light socket and spin it a little the light will come back on.

    Has me thinking that some corrosion is between the mounting leg and the socket.

    So I wanted to pull them and clean somehow then test before putting back in the machine.
    As in test with a light in them needing a good proper voltage.
    One thing I thought is to solder a wire from the mounting leg to the socket.
    I already moved the wire from the terminal on the socket to the center pin and this did not fix it.

    I will check at radio shack to see what they offer and look for a charger here at home.

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