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Make: Volume 77
book

Make: Volume 77

by Mike Senese
May 2021
Intermediate to advanced
128 pages
5h 30m
English
Make: Community
Content preview from Make: Volume 77
Assemble a simple intercom system using your existing
landline wiring
1+2+3
Home Phone Fun
STEPHEN COOKE is an
educator, researcher, and maker
living in Rhode Island.
My two daughters wanted a way to communicate
with each other from their rooms; I wanted to
get them something that didn’t have a screen or
require batteries. I discovered a device called a
ringdown emulator, which simulates a phone line,
complete with dial tones and ringing. I realized
I could repurpose our old landline phone wiring
with this to create an intercom for them. A win-
win for everyone!
NOTE: Be sure that your phone wiring is not in
use —including for home alarm systems, ...
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Publisher Resources

ISBN: 9781680457070Errata Page