Panasonic JW Series 5 A JW2SN-DC5V

Development  Resources: demo codes, schematics, datasheets, etc

A relay is an electrically operated device. It has a control system and (also called input circuit or input contactor) and a controlled system (also called output circuit or output contactor). It is frequently used in the automatic control circuit. To put it simply, it is an automatic switch to controlling a high-current circuit with a low-current signal.

The advantages of a relay lie in its lower inertia of moving, stability, long-term reliability and small volume. It is widely adopted in devices of power protection, automation technology, sport, remote control, reconnaissance and communication, as well as in devices of electromechanics and power electronics.

Generally speaking, a relay contains an induction part, which can reflect input variable like current, voltage, power, resistance, frequency, temperature, pressure, speed and light etc. It also contains an actuator module (output) that can energize or de-energize the connection of the controlled circuit.

There is an intermediary part between the input port and an output port that is used to coupling and isolate the input current, as well as actuate the output. When the rated value of the input (voltage, current and temperature etc.) is above the critical value, the controlled output circuit of the relay will be energized or de-energized.

NB: input into a relay can be divided into two categories: electrical quantities (including current, voltage, frequency, power etc.) and non-electrical quantities(including temperature, pressure, speed, etc.)

Reference for Arduino and reference to all matters

Ardunio from Wikipedia

JQC-3FF 10A SPDT 5V DC 05-1ZS(551)

Notes:

1. There may be slight size deviations due to manual measurement, different measuring methods and tools.
2. The picture may not reflect the actual colour of the item because of different photographing light, angle and display monitor.

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