ELI5: Explain Like I'm 5

Synchronous circuit

A synchronous circuit is like a group of kids playing a game together. Imagine you and your friends are playing tag, and you always start and finish the game at the same time. Before you start, you all agree on what the rules are and when to start running. Once you start, you always run around in the same direction and at the same speed, so everyone stays together. When the game is over, you all stop running at the same time.

Similarly, a synchronous circuit is a group of electronic parts that work together like your friends playing tag. They all agree on when to start and finish a task. Each part follows a set of instructions, called a clock signal, to know when to start or stop working. They all work in the same way, making sure they're in sync and not running ahead or falling behind.

For example, a computer processor has many parts that work synchronously. Each part receives a clock signal that tells it when to start or stop working. They all work together to process data, each following the same set of instructions to make sure everything works smoothly.

So just like how you and your friends work together to play tag, synchronous circuits work together to complete a task, all following the same set of instructions and timing to stay in sync.