[DrBazza]

The "(BBC) Micro User" used to be published monthly, and had hardware project in each edition. Towards the end there were instructions on how to build your own acoustic-coupler modem where you pushed a regular telephone into two muffled cups. I think the only or main thing you could connect to was Prestel.

https://en.wikipedia.org/wiki/Prestel

It was a great machine for doing early robotics too - there was an Osbourne/Usbourne book on making an arm from balsa wood.

[darreninthenet]

Prestel was my first online experience, over a 1200/75 baud modem (I just missed the acoustic coupler era, this was mid-80s) and led me onto dialing up many BBSs... much to my fathers gnashing of teeth when the quarterly British Telecom phone bill came through! Phone calls used to be expensive in the UK (even local).

I remember Micro User magazine, wish I still had my collection!