http://www.ried.cl
Counting boxes on a miniature “production line” with a cheap laser pointer and a light sensor.
For more info about the HP48 connection with arduino (working as a complementary remote command device) take a look in http://groups.google.cl/group/comp.sys.hp48/browse_thread/thread/33468da10be79e93?hl=es# (I had to create a simply translator to virtually support the HP-Arduino I/O)
Duration : 0:3:14
[youtube n6edRkNRSOk]
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