Posts Tagged ‘Programable’
Timer, Counters and Relays
Relays:
A relay is an electrical switch that opens and closes under the control of another electrical circuit. In the original form, the switch is operated by an electromagnet to open or close one or many sets of contacts.
A simple relay has 5 pins. The left 2 pins are the operating part by taking input, the rest of the pins are the switching part to get output. A 4 pin relay doesn’t have NC pin. Read the rest of this entry »