Have you ever wondered about the origins of the smart doorbell? Although a modern phenomenon, it has a history dating back over 100 years. During the latest series of The Secret Genius of Modern Life, Hannah Fry explores its early origins with a device created by Leon Theremin.
During the episode radio amateur Neil, G4DBN, re-creates Leon’s device. The episode will air on BBC2 at 20.00 on Wednesday the 23rd of April.
Many of you will know Neil from Season One, Episode One of the series when he re-created the Great Seal Bug. Both episodes are available to watch now via BBC iPlayer.