What is the trigger

Who knows what is the trigger? This is one of the first devices facing the radio Amateur, after reviewing the basic elements of electronics such as resistors, capacitors, transistors.

So what is the trigger?

By definition, it is the element that has two stable States. The simplest example of it not related to electronics is the switch. He also has two stable States – enabled (on). and disabled (off). To trigger these States will sound accordingly so – in a single state (on). or reset (off). In a single state of the output trigger tension is a bit less than the supply voltage in the reset status – low voltage. Hence its name, i.e. the element is in one position. In English the trigger-latch.

The Simplest electronic trigger transistors. For its production you will need two transistors, a few capacitors and resistors. The first application of a trigger would be to use it as a switch.

Often it is necessary to perform a simple action-press the button and then let her go. Now, usually this action is remembered by the trigger. When you press the button it is installed in an isolated state, and then the device knows that it needs to operate in the mode specified by the selected button. To exit this mode, press another button, then the trigger will reset and will be set to the new mode.

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However, this is not a complete answer to the question, what is the trigger. This is just one of the possibilities of its use.

There is a wide variety of schemes trigger, even there is a special class of integrated circuits, which are also elements stable States.

Implemented various types of triggers, wherein the circuitry and principles of management.

Enough just to mention such elements as D-, RS-, JK-trigger, synchronous, asynchronous, single-stage, two-stage countable trigger. All of these are elements of digital devices. They are used for performing various tasks, from remembering button state (pressed or not) to participate in signal processing.

So the question, what is the trigger, you can get very different answers:

Is the memory element of digital devices, an elementary memory cell;

Is a logical element involved in the digital signal processing;

Is the basic element of digital circuitry.

However, even all that is already listed, does not cover the possibilities of application of the trigger. So, it can be implemented on Electromechanical relays  or on the power components. You can use the trigger to control the power elements.

Finds use not only the idea of electronic devices on transistors, but the idea of using the latch principle, the principle of implementation of some actions when a particular event occurs. This is especially often used in programming. And in many other cases, is implemented in a similar method. This is a very convenient principle when a subsequent event occurs after the implementation of the given conditions.

So a definite answer to the question, what is the trigger to unlikely. Here be sure to clarify what is meant by this word.

If it's an electronic product, or item of digital circuitry, then the answer is one.

If the word “trigger” refers to the principle of regarding the use of the concept clips, fixing of occurrence of some event, the area where this principle can be implemented can be very different, ranging from programming, to other spheres of human activity.