Newbie question about an application of Arduino

Projects General Guidance
1

I am wondering if this is possible. I would like to use , as an output, a bar graph LED bank (I already have the code to make the bank's LEDs blink sequentially back and forth. I would like to hook this up so that whenever someone is using the phone line (a land line), that the LED bank with light up and sequentially light up back and forth, but the phone is not in use, the LED bank is off.

Any thoughts?

Thank-you for your time and expertise.

2

Have you decided how you will know this?

3

What country are you in?

Depending on this is the way telephones work and what voltage they work on.
Also in some countries, it is illegal to connect home made equipment direct to the telephone line. Any equipment connected has to be "type approved" which means it needs testing in an approved lab before you are permitted to use it. This is expensive.

4

I am in Canada. I am using a Magic jack system which goes through my router for phone service. There is no phone company involved

5

The led will flash when the phone is picked up

6

Then you need a sensor to detect a LED flash. Does the LED continue to flash while the phone is in use or does it stay on? IF it just flashes, then you need to determine it is continuing to flash rather than on and then off for a long while.

7

y but how would he sense activity on the line... voltage divider on the line to analog in, and then if its not == when the line is closed flash the leds? could be done analogously by op amp or opto too possibly and have the circuit flag a digital pin on status change, but he needs to measure all possible voltages on the line beforehand, as to select proper voltage divider, and not fry stuff. maybe he could even make the router tell arduino when voip is in use, or mess with the phone, or sense RC between phone and station, or plug in a bought shield for arduino utp/modem idk if it could tap the line continuously, or what would it scan for....
Dosen't seem very difficult tho

OP figure out a method/circuit then ask for specifics, I'm sure google has some relevant info xD

8

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