Intercom Central 413 - Three Channels HOME Power-line Intercom System, 3 Wire, White, Three Stations Set

the following program is brought to you by element14 the electronics community where you can connect and collaborate with top engineers from around the world join now at element14.com slash presents hello and welcome back to element 14 presents I'm Derek and in today's episode I'll be building a multi phone intercom system or party line with rudimentary dialing capability the beauty of this circuit is that it utilizes any old landline phone without modification and uses a DTMF decoder to individually address and ring one or more telephones sound interesting let's get started amazing hacks inspired designs each week element14 presents brings you innovative projects using electronics engineering and more so why build this project anyways well aside from wanting to tell my kids to complete their chores from my office I have fond memories before cell phones became affordable and widespread