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You need a device to handle the difference between computer level signals and AC electrical switching.
The most direct solution would be an optically coupled device. These combine an LED (light emitting diode) with an optically triggered SCR (switch). The LED shines on the SCR, which turns it on. These devices comes in many sizes to handle a wide range of 'bulbs'.
Before opto coupled devices, this would have been done by first using a darlington switch to drive a relay coil. Opto coupling protects the micro controller from the relatively dirty power of the AC line, and lets skip the amplification step.
What else can I help you with?
What do relay and circuit breakers use?
No. A relay is an electric switch and a circuit breaker is an overcurrent device.
What is advantage of digital relays?
They can be used as a kind of safety switch to allow a circuit with a small current through to switch on a circuit that will hve a larger current flowing through it.
When is a circuit considered a dry circuit?
when contacts on a switch or relay does not melt enough surface to allow current flow
What is an electrical switch that is actuated by a separate circuit?
An electrical switch that is actuated by a separate circuit is known as a relay. A relay allows a low-power circuit to control a high-power circuit without direct electrical connection between the two. When the separate circuit activates the relay's coil, it creates a magnetic field that closes or opens the contacts in the high-power circuit, enabling or disabling the flow of electricity. This setup is commonly used in automation, control systems, and protection devices.
What is pneumatic relay?
The wrod pneumatic deals with the pressure and air control ....now according to newtons law...f=ma; we can add a relay to pneumatic, a relay is a electromagnetic switch which connects to circuit and control the flow elctricity....in the circuit.....thus , by reading the above theory we can estimate that what pneumatic relay is exactly.... no claps for me,,,,,, thank u..
Why use relay insted of switch?
Because a switch is a 'permanent' action. A relay only completes the circuit while there is power. If there is a fault in the circuit, a switch will still allow power through, whereas a relay will break the circuit.
What can a relay be used?
A relay is an electrical switch. It allows a low current "switch" circuit to control the electricity flow of a high-current circuit load
What do relay and circuit breakers use?
No. A relay is an electric switch and a circuit breaker is an overcurrent device.
What is the job of the fuel pump relay?
A relay is a switch which opens / or closes a circuit
Is there a relay switch or circuit breaker on a 94 sts?
There are multiple relays and circuit breakers in that vehicle.
Why buffer is used between micro controller and relays?
Hi, Buffers usually provide protection to the microprocessor from what is called, `back EMF`(also called spiking) in layman's terms, or the energy created in the coil as the control voltage is released. Also, since most micro's have limited output current capabilities, the buffer could serve as a relay driver, providing the power necessary to energise the relay. Hope this helps, Cubby Cubby is right, mostly the maximum current that a micro controller can source or sink is 25ma, where as most of the relays require 50ma-200ma so a buffer is required to provide the necessary current to activate the relay coil, moreover a back emf is generated when the relay is turned OFF which can damage the controller so buffer also protects the controller from this back EMF......check this link to know more about interfacing relay to a micro controller http://www.dnatechindia.com/index.php/Tutorials/8051-Tutorial/Relay-Interfacing.html
What is a abs relay?
Abs relay is a switch that allows a small current flow in a circuit to a height control circuit for the functioning of the anti lock braking system.
What is advantage of digital relays?
They can be used as a kind of safety switch to allow a circuit with a small current through to switch on a circuit that will hve a larger current flowing through it.
When is a circuit considered a dry circuit?
when contacts on a switch or relay does not melt enough surface to allow current flow
What are the uses of the relay?
They can be used as a kind of safety switch to allow a circuit with a small current through to switch on a circuit that will hve a larger current flowing through it.
Where's is the relay inter light?
Interior lights do not come on. Running boards lights do. Pulled the fuse and its good. Is there a Interior light relay.
How do you know if the relay switch is bad?
Switch it with a known good one from a non critical circuit to see if it solves the problem.
