No, it is not guaranteed safe.
This is one of the very first things I learned about electricity. Dad 
brought 4 th grade son an old car battery and broken car radio home to play 
with. These were 6 volt days. Safe, right? It lead to my getting the 
vibrator power supply running and some very nasty burns between my thumb and 
finger on my right hand. I learned a lot in a couple of seconds there 
including the smell of burning flesh. Still have the scars. It may have been 
the most important thing I ever learned. No, I did not tell Dad!

John Ferrell
http://DixieNC.US

----- Original Message ----- 
From: "John Waters" <john_fm_waters@hotmail.com>
To: <piclist@mit.edu>
Sent: Monday, November 14, 2005 12:20 PM
Subject: [EE]: Safety of 12V dc to 110v ac using D cells


> Hi All,
>
> I saw a kind of 12v dc to 110v ac inverters selling in electrical stores 
> that allow people to drive their laptops in a car. I want to use it to 
> drive a small device that uses 110v and consumes power less than 3 Watts. 
> But instead of using the car battery, I want to use 8 pieces of D cells as 
> the dc source. The reason is, the 110v ac generated this way would be very 
> safe even when someone accidentally touches it? It is hard to imagine 8 D 
> cells could kill someone, right? Could anybody give some comments to my 
> argument?
>
> Thanks in advance!
>
> John
>
>
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