Sandclock for Arduino

easy Hourglass for Arduino

V1.6 - 17 february 2016 Blenderlab (http://www.blenderlab.fr / http://www.asthrolab.fr) Fab4U (http://www.fab4U.de)

Randomly choose the amout of sand to fill the upperglass
Drops one marble every second
Can be shaked to reset counter
Display time once the globes are empty

Hardware needed :

Arduino (Uno,Mini,Micro...)
2 Led Matrix with MAX7219 controller
Wires, powersupply ...;-D
DS103 Real Time Clock (for time memory)
SW350D or any digital vibration sensor (SW320D ...)
Standing stuff is ready to print : http://www.thingiverse.com/thing:1316240

How To :

Connect the first matrix to the arduino (5 pins, as follow)
Connect (chain) the second matrix to the first one : All same pins except (DOUT->DIN)
That's it !

Todo

Interface to select the duration (Touch button)
Interface to set Time (Touch buttons too ?)