All items tagged with phone and power supplies (3)

5-05-2016 | How green can energy sources become? This crowd-funding project on Indiegogo proposes a system that will obtain the energy for your portable...

1-01-1998 | Although the electricity supply will rarely fail in most of the UK, unexpected power cuts lasting several hours are not uncommon in ma...

1-11-1997 | The magnification of very weak audio-frequency signals is and remains a precarious affair. That is why a microphone amplifier good en...