I am confused are the phone lines (i.e green and red lines) DC or AC voltage.
Because when I measure the lines I have to set my multimeter on DC if I set it to AC mode I get 0 v.
In DC mode I get about 50 volts.
But then I saw this video at the bottom of the page of this link
http://www.engadget.com/2007/10/14/tap-into-the-phone-companys-current-if-you-dare/
They use a bridge retifier and a regulator? I thought bridge retifiers where used to convert AC to DC. So I should have my multimeter set to AC mode?
If it is not AC then why the retifier and regulator?
If it is AC then what is the frequency is it 60 HZ like the power lines?
Because when I measure the lines I have to set my multimeter on DC if I set it to AC mode I get 0 v.
In DC mode I get about 50 volts.
But then I saw this video at the bottom of the page of this link
http://www.engadget.com/2007/10/14/tap-into-the-phone-companys-current-if-you-dare/
They use a bridge retifier and a regulator? I thought bridge retifiers where used to convert AC to DC. So I should have my multimeter set to AC mode?
If it is not AC then why the retifier and regulator?
If it is AC then what is the frequency is it 60 HZ like the power lines?