Instead of a keyboard for text input, it replicates a 19th century Crook and Wheatstone telegraph, replacing the five needles of the original with a diamond-shaped grid of LEDs. At its heart is an ...

The Artstor website will be retired on Aug 1st. Open: Science Museum Group Henley's magneto electric double needle ... Henley's magneto electric double needle telegraph, 1848-1852 [co32906] / Henley's ...