Archive for the ‘Optical’ Category

Engine RPM (Part 5)

Part 1, 2, 3, 4, 5 The last two posts explained how to check whether the speed of a rotating object agreed with a predefined value or not. To the cost of an additional optical sensor and a display, we may now measure any rotating speed still without contacts between the moving object and the […]

0.56″ 7-Segment Backpack (Part 1)

As far as the development of interactive applications is concerned there always is a need for displaying information in a human readable format.. Let’s start with a quick and dirty review of the available options with Arduino. * e.g. digital pin 13 LED ! ** If you are from the navy *** Consider buying a backpack which […]