On 2/21/2012 3:00 PM, George Nychis wrote:
Okay! So apparently there is some interest in power line communication
for GSoC. But, what we would want to do is already have a safe way of
connecting the USRP in to the wall socket for the student(s), and for
the future of GNU Radio and USRP power line communications development.
So, as a goal of this thread I'd like to get some feedback on how we can
make this possible. Ideally, something off-the-shelf would be great,
providing the highest amount of safety for those experimenting with it.
Here's a very simple approach:
http://leapsecond.com/pages/ac-detect/
There was a bunch of discussion about this on the time-nuts mailing
list, and some folks suggested changes for increased safety (including
putting two resistors in series so that if one fails short -- which is a
very unusual occurrence -- there's an extra layer of protection. But in
general, with large value resistors the current is limited to a very
safe level -- and it's current that kills, not voltage.
John
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