Luckily, requisite googling found a “multifunction shield” for the Arduino Uno platform available at a low cost from most internet suppliers. Here is a circuit diagram of the ... t have their pins of ...

Next is the Hookup diagram of the Arduino 4-Digit 7-segment LED Display, followed by the Arduino sketch. Carefully follow the hookup diagram to complete your hardware,and then upload the sketch to ...

His clever solution is to use an Arduino Uno R4 ... To turn on a segment, he connects a segment to a GPIO pin set high while sending 3.5 volts out of the DAC output into the display’s common ...