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https://www.youtube.com/watch?v=4ifsaD4pbuk&feature=youtu.be
Turn my calculator in to a clock - ergo clockulator.. Stupid? yes useless? yes but awesome clock is't it..
(some may call it clock.exe 2.0 - installed in system32..)
non printed parts: (if you need exact measurement post a comment and i will get them)...
casio calculator 2 mini servos PES-TU1939 12v solenoids (found in some old printer i had..) pointer made of anything than can have a screw and is long enough spring
controlling the solenoid with arduino: relay 5v control 12v output transistor diode..(standerd relay control circuit)