Relay logic is a way of expressing the logic of a control circuit using relays ... Relay logic and ladder diagrams use many symbols, including switches, contacts, coils, timers, and sensors.

A circuit is a closed loop containing various components. Electrical current flows around the circuit. Scientists use symbols ... projects. Symbols are used to create circuit diagrams.

Royalty-free licenses let you pay once to use copyrighted images and video clips in personal and commercial projects on an ongoing basis without requiring additional payments each time you use that ...

Abstract: Scope of research presented in this paper refers to the off-line recognition and interpretation of the content that conveys images of printed or hand-drawn direct current circuit diagrams ..