Lorenzo De Luca github - gitlab - stackoverflow Progetto ARDUINO/arduino uno: Control 4 displays with just 1 shift register TINKERCAD(to test the circuit): https://www.tinkercad.com/things/kcmYQzwdxfz?sharecode=snSx71fpz4WDnCL7fiYXr-crr0Ja2KmcElifnT3s