can i use a 12 volt battery on a 9 volt device ?
My friends dad is building a Tardis for his grandson.
We have rigged up the blue flashing light using a 12 volt car battery, we
now need to sort out the sounds.
I was thinking of using an old cars cassette tape, but I have an old 9 volt
portable cassette handy.
Will it burn down the TARDIS if I use that instead ?
tafankuverymuch
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