Oxygen display of the diver

First test for the display on the arm of the diver, it shows the amount of oxygen.
The display consists of two red, three yellow and seven green LEDs each with 150 Ω resistors.

The meaning of the colors:
green – enough oxygen
yellow – the oxygen content is critical
red – not enough oxygen, the diver has to press a button to activate the other tank on his back. At the end blink the the last red LED as a kind of alarm.

About Susann

After kites, hotairballons and parts of an airship now something delicate like a theater costume under my sewing machine – super, as long as I do not have to crochet or knit! I'm a Computer Science & Media student at the Bauhaus university Weimar.