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A real yoyo project - At about $1.08 each in small quantities, the PIC12F629
is just begging to be used in small and strange projects.
[img:80fe655682]http://www.circuitdb.com/download.php?fileID=140[/img:80fe655682] The
original yoyo was equiped with 2 LEDs that lit up when the device was spinning. I
decided to add a micro to give it some extra pazazz. The trick here is to make the
unit work without a power switch. The mercury switch is positioned so that it supplies
power when the unit is spinning. After about 20 seconds, the PIC shuts down in sleep
modes, see listing below. That way, if the switch is....