mike dunagan;1881173; said:
If you do not have phone serviced on at your home, can this led still work? I have a phone line near my tanks that just sits there.
Plug in a phone, if you hear yourself in the ear piece the there is power, if it sounds the same as unplugged then you have nothing...
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The 40 volt is for analogue phones. Has anyone with cable phone tested the jacks? they are lower. I have it, never tested, but I know some of my phones, the caller ID wont work unless I am on a call.
Here is a DIY setup of the unit
http://www.engadget.com/2007/10/14/tap-into-the-phone-companys-current-if-you-dare/
It appears the LED will turn off when you pick up the phone, I remember making something in shop class in the early 80s that used an LED & a phone line (dint have the plans anymore) & the led shut off when any phone was picked up & flashed when the line rang (just like the video in the link above).
Does anyone have a party line ? Does anyone remember what that is ? You share a line with neighbors, & your ring is different than theirs. anyone makes a call your light goes out, anyone gets a call you flash.
Perhaps this unit has a built in batter to charge to avoid the flash & off...
