Build your own!
and wooden grandfather CLOCK
Visit the Western Australia Museum exhibit.
The Antikythera Mechanism is a 2200 year Ancient Greek portable planetarium
and is the first known analog computer marking the begining of modern computing.
The front dial displays the zodiac position of the first 5 planets, sun, moon phase and date.
The 67 gears computes addition, subtraction, multiplication, division and
7 harmonic orbit first order Fourier Transforms!
The back dials display the 72 year lunar calendar, Olympic games calendar
and most important predicts a solar or lunar ecliplse.
The mechanism was housed in a wooden box complete with a built in instruction manual.
The mechanism is not operated vertically as illustrated in the videos below.
The mechanism is operated horizontally to minimise gear backlash.
3D computer model based on November 2022 research
The Antikythera PI is a 3.14 scale wood frame replica which has
been hollowed out to highlight the genius of the Ancient Greek design.
Something a bit simpler to practice on first
Email queries to
Dr Nicholas Andronis PhD CPEng: