The first electronic device ever invented is the relay, a remote switch controlled by electricity that was invented in 1835 by Joseph Henry, an American scientist, although it is also claimed that the English inventor Edward Davy "certainly invented the electric relay" in his electric telegraph c. 1835.

When did electronics begin?

Electronics' actual history began with the invention of vacuum diode by J.A. Fleming, in 1897; and, after that, a vacuum triode was implemented by Lee De Forest to amplify electrical signals. This led to the introduction of tetrode and pentode tubes that dominated the world until World War II.

How long have electronics been around?

When the field of electronics was invented in 1883, electrical devices had already been around for at least 100 years. For example: The first electric batteries were invented by a fellow named Alessandro Volta in 1800. Volta's contribution is so important that the common volt is named for him.