The 74HC595D is a popular shift register widely used in electronics for expanding the number of output pins available from microcontrollers like the Arduino or Raspberry Pi. Its ability to shift bits and control multiple outputs with just a few pins makes it indispensable in various applications, from LED displays to motor controllers. However, like all components, it’s not immune to problems. Understanding common issues and knowing how to troubleshoot them is crucial for ensuring your circuit works reliably.