Visitors to Germany may
have seen the world’s
largest digital clock which is
housed in a 234 metres high
transmitter tower on the
banks of the Rhine in Düsseldorf.
The time is indicated
by vertically arranged lamps
that shine their light through
‘portholes’ (glazed round
windows). This article
describes a miniature
replica of this Rheinturmuhr
(Rhine Tower Clock). It is
controlled by an Atmel
processor and synchronized
by a DCF module.
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