The Pi Rotary moves a step ahead in the class of projects of this book. Regardless of the simplicity of the technology of the device – a mid-‘60s rotary phone – this upcycling work required more time then I expected. Together with a Raspberry Pi and a few other components, making all the new features working as desired was a challenging and fascinating experience. This project first appeared on The Shed magazine issue number 89, March/April 2020.
Every time I start changing the behaviour of a vintage object, frequently adding or replacing some original parts with the most recent technologies, it is like to travel with a time machine, take something from the past jumping it to the future. In this case, a rotary phone made up a jump over half a century.
(from the chapter introduction of Vintage Upcycling With Raspberry Pi and Arduino).