Homemade Telegraph. Simple By code_dawg12 in CircuitsElectronics2,181112Save PDFFavoriteIntroduction: Homemade Telegraph. SimpleBy code_dawg12Follow More by the author: About: I love to build things and currently want to build a hovercraft but I am having trouble More About code_dawg12 » I made a telegraph that lights up and makes noise for 5$. I like it and might make a tutorial if people vote for me and ask.