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Very small 12v circuit

Discussion in 'General Electronics Discussion' started by Utah, Mar 28, 2011.

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  1. Utah

    Utah

    2
    0
    Mar 28, 2011
    Electronics are way over my head, which didn't seem to stop me from trying this project.

    I'm trying to make a 3' run of battery powered lights. Picture attached.

    I have 5 small 12v dc led lights that I've connected to a run of about 3 feet of wire, connected to a battery pack (8 AA batteries, which are 1.5v) and a push button on/off switch. The idea is that I'd be able to hold the batter pack and on/off switch in one hand while holding the other end of lights.

    The battery pack didn't come with leads but uses a 9v battery type connection, so I bought a 9 v connector with leads.
    I got everything wired up and although it worked, after about 2 minutes the battery pack started sizzling and smoking.

    Any help on what I may have done wrong?

    Thanks in advance!
    Claudia
     

    Attached Files:

  2. Resqueline

    Resqueline

    2,848
    2
    Jul 31, 2009
    Can't tell what's underneath all that tape, but chances are that's where you'll find the fault. A smoking battery pack is a shorted battery pack.
    Anytime I come across a heavily taped whatever wherever I always unwrap it to find (the) bad workmanship underneath.
     
  3. Utah

    Utah

    2
    0
    Mar 28, 2011
    Well, Resqueline, that's a start, but I don't think it's the answer. Under the tape is just the 2 16 gauge wires. I only taped them together because I need them to not move independently. Ideally I'd have just run them through conduit but I couldn't find anything quickly. Any more ideas?
     
  4. Resqueline

    Resqueline

    2,848
    2
    Jul 31, 2009
    I still can't see what's going on beneath that tape. That's where it all happens.
    Of course I could ask if you hooked up the switch correctly..
     
  5. pufftmd2389

    pufftmd2389

    4
    0
    Apr 1, 2011
    if i set up that switch i would have just ran the positive to the switch, the negative directly to the lights.
    how do you have them wired, both positive and negative to the switch? is it a single pole or two pole switch ( most likely a single pole [two wires coming out])

    cant say i haven't done something stupid like ran wires that would end up shorting the circuit out thinking it would complete it correctly( would have if i had one ways tho so i wasn't totally wrong).
    did the lights turn on at all? kinda should have been the first thing to be asked lol
     
  6. (*steve*)

    (*steve*) ¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd Moderator

    25,497
    2,839
    Jan 21, 2010
    Well, it wouldn't have been the first thing I asked because (s)he said:

    More likely there was a short under all that tape.

    It would have been interesting to know if the batteries were getting hot while the lights were on, and/or whether the lights were still on when the batteries were sizzling and smoking.
     
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