wireless telegraphy

Marconi used spark arresters, induction coils, and electrical keys to create a radio transmitter, modified metal detectors, and added antennas to make a receiver. He installed this transmitting and receiving device on his own rooftop, completing communication for the first time up to 30 meters in length. Wireless telegraphy has been widely used in maritime communications, military command and news dissemination. However, with the development of modern communication technologies such as telephone and Internet, its use has gradually decreased.

The unit is designed for unsupervised public use: controls are recessed or shielded, moving parts are enclosed, and the interface is operable by a child of about six with no instruction. Where a screen is used, the language can be switched without changing the hardware, and the content can be replaced on site.

In 1894, the year Hertz passed away, Marconi had just turned 20 years old. One day, he accidentally read Hertz's experimental introduction and paper in an electrical journal. Since childhood, he has enjoyed playing with coils and electric bells, so he immersed himself in the study of electromagnetic waves. He thought that since Hertz could detect electromagnetic waves from a few meters away, as long as there were sensitive detectors, electromagnetic waves could also be detected from farther places. After multiple failures, he finally took the gratifying first step. He installed a device for emitting radio waves upstairs in his home, and placed a detector downstairs, which was connected to an electric bell. As soon as he connected the power upstairs, the electric bell downstairs rang. In the summer of 1895, Marconi improved the spark type transmitter and metal powder detector of the radio device by installing antennas on both the receiver and transmitter, successfully conducting experiments on radio wave transmission signals. In the autumn of the same year, Marconi transferred his experiments from indoors to outdoors, focusing on communication.