This is a simple 0 to 9 counter circuit constructed using Arduino! Here, a common cathode 7-segment LED display is connected to Arduino for displaying the digits. The code (Arduino sketch) allows push ...

Significantly, there’re two RGB LED types – the common-anode and the common-cathode. Below is the pinout of a generic common-cathode RGB LED. First, I tested my RGB LED using a Chinese LED tester ...