Telephone Ring Monitor

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If you go as far as to build these projects people may think you to be a genius.
Don't tell them any different, they don't need to know.
Re-Cycle. Re-Use. Re-Purpose. Re-New.

This is a little unit that Radio Shack used to sell for 5 or 10 dollars.
You can see how simple it is with very few parts.
I have to say this can be built from junk people throw out for $0.00.