A control circuit that uses limit switches to sequence a series of events is called a(n) __________.

The term "event sequencing circuit" accurately describes a control circuit that employs limit switches to govern a series of operational events in a specific order. In such circuits, limit switches play a crucial role by detecting the position of moving parts, which then activates or deactivates other functions in a predetermined sequence. This sequential operation is vital in various applications, such as automation systems and machinery, where precise timing and order of events are essential for safe and efficient operation.

In contrast, other terms like "follow the leader circuit" more typically refer to circuits where one component's action directly influences subsequent components, but does not necessarily imply the complexity of sequencing. "Synchronized circuit" tends to denote a system where multiple processes are coordinated to occur simultaneously rather than in a defined sequence. "Stair-step circuit" indicates a gradual, stepwise change in operation, which may not accurately represent the complete sequential actions that limit switches would control. Therefore, "event sequencing circuit" is the most appropriate designation for the described functionality.