This circuit makes a hidden emergency
HDD to be controllable only by your key,
regardless of how many people use
the same computer.
This HDD should be used only for
Copy and paste, because of low power
of relay batteries, if you want it to work
longer, add more batteries using parallel connection.
Or use a stronger RC Circuit.
This is an electronic Hack to protect the data
from Software Hackers,or some-one you don't
want him to access your data.
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