Linked from

The 14 pages that link to Relay, each with the reason it gives.

• ThermostatBroader topic: Many thermostats use a relay to switch power to heating or cooling equipment.

• Digital logicRelated: Relays provided early physical switches for implementing Boolean operations.

• Programmable logic controllerRelated: Relay banks were the hard-wired control systems PLCs were designed to replace.

• ElectromagnetBroader topic: A relay uses coil current to control a separate electrical circuit.

• Electrical contactRelated: Its contacts switch circuits while facing wear, arcing, and resistance constraints.

• Samuel MorseRelated: Relays allowed telegraph signals to be renewed across longer routes.

• Joseph HenryBroader topic: Henry devised an early practical relay, showing how electromagnets could transmit control over distance.

• PlugboardRelated: Relays are common electromechanical components whose connections a plugboard can configure.

• Herman HollerithRelated: Relays helped turn detected card patterns into machine operations.

• Electronic lockRelated: A controller can use a relay to switch power to a lock actuator.

• Harvard Mark IRelated: Relays formed the Mark I’s switching logic and controlled its operations.

• Konrad ZuseBroader topic: Electromechanical relays formed the switching elements of the Z3 and several earlier Zuse machines.

• Howard H. AikenRelated: Thousands of relays represented and controlled the machine’s operations.

• Rotary switchCompared with: A relay switches circuits electrically, while a rotary switch is usually selected by hand.