The ring consists of 35 individually addressed RGB LEDs with integrated controller. The module needs single pin of the microcontroller, e.g. an Arduino board. The LEDs are arranged at equal distances on the circumference with an outer diameter of 11 cm. Each of them consumes a current of 18 mA, which in this case gives a total value of approx. 576mA. The ring can be powered with a voltage of 5 V.