Reley

Relay is.
is a component (series) electronics to decide or connecting a circuit, which is similar electronic switches, winding, and the pivot rod of iron. work work automatically use this relay in the electronic devices are numerous. can be used as a remote control device as a controller Relay Especially in devices that are electronically or automatically. Examples in Television, Radio, automatic lights and others.

How these components work begins when the flow of electrical current through the coil, and then create a magnetic field around it so it can change the position switch is in the it relay , resulting in greater electrical current. This is where the virtues of this simple component is the minimal form can produce a greater flow.
Use of relays in electronic devices which have the advantage;
• Able to control its own current and voltage desired
• Able to maximize the amount of voltage until it reaches maximum limit
• Able to use both the switch and the coil is more than one, tailored to the needs of


electronic Relay is a switch that can be controlled from another electronic circuit. Relay consists of 3 main parts, namely:

1. coils: winding of relay
2. common: the part that is connected with the NC (in normal circumstances)
3. Contact: consists of the NC and NO

control logic in a system. As a "programming language" configuration used
the so-called ladder diagrams or relay ladder logic. Here are some hints about the relay
ladder logic (ladder diagram):
Special wiring diagram that is used as a programming language for
relay and switching control circuit.
LD No showing a series of hardware, but the flow of thinking.
LD Work flow based on logic, not the flow of voltage / current.

Relay Ladder Logic is divided into 3 components:

1. Input furnisher
2. Logic decision makers
3. Output of the work done


About Relay

Distinguishing NC with NO:
NC (Normally Closed): the switch of the relay which in normal circumstances (not given voltage relay) is connected with the common.
NO (Normally Open): the switch of the relay which in normal circumstances (not given voltage relay) is not connected with the common.

Parts of the relay can be known in 2 ways, namely:
1. with how to view the content of these relays
2. by using a multimeter (Ohm)

How to know the relay is still functioning or not can be done by providing the appropriate voltage to the relay is on the koilnya. If ignition still works  NC NC NO or NO, it can be said that the relay is still in good condition.


Connect the common and NO if you want a series of ON when the coil was given voltage.
Connect the common and NC if you want a series of ON when the coils are not given voltage.

Relay Types

• SPST - Single Pole Single Throw.
• SPDT - Single Pole Double Throw. Consists of 5 pins, namely: (2) coil, (1) common, (1) NC, (1) NO.
• DPST - Double Pole Single Throw. Equivalent with 2 SPST switches or relays.
• DPDT - Double Pole Double Throw. Equivalent with 2 SPDT switches or relays.
• QPDT - Quadruple Pole Double Throw. Often referred to as Quad Pole Double Throw, or 4PDT. Equivalent to 4 SPDT switches or relays DPDT relay or two. Consisting of 14 pins (including 2 pieces for the coil).

One of the main uses relay in the industrial world is to implement

Reley is an electrically driven switches, the radio transceiver is used to replace the turn of the flow of electricity from the receiver to the transmitter and replace the turn of the antenna from the receive to transmit.

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