/*
https://www.ti.com/product/CD4026B
*/
constexpr uint8_t CLK_PIN = 2;
constexpr uint8_t DEI_PIN = 3;
void setup()
{
pinMode(CLK_PIN, OUTPUT);
pinMode(DEI_PIN, OUTPUT);
digitalWrite(DEI_PIN, HIGH);
}
void loop()
{
digitalWrite(CLK_PIN, HIGH);
delay(250);
digitalWrite(CLK_PIN, LOW);
delay(250);
}