A ‘Momentary Switch’ is also known as ‘Membrane Switch’ in many places. The momentary switch holds a button that can be used for a long press — either to switch on or off. This option helps the end user to press the button much faster and with ease. Such Momentary Switch is much better than the traditional toggle switches. Actually, there are two varied SPST switches available and you should thus be careful while buying these momentary switches.
Such switch is also known as ‘Push to make’ which means either button will be ‘ON or OFF’, depending upon the users operation. The switch naturally comes to its normal position (i.e, OFF position from ON position) when released. But the button must be hold continuously when you want to switch on. It is similar as that of the door bell. When the button is pressed, you will find a connection between the two contacts. Hence, the button can either be on or off.
Another type of momentary switch is known as ‘Push to Break’. That means this switch does not have any continuous process. The switch gets back to the OFF state when it is pressed and will be turned ‘ON’ manually which is operated by the user.
How does Push to Make Switch Work?
When you use ‘Push to make’ (ON or OFF), you must find out the right place to fix these switches. This type of switch (Push to make) actually includes a circuit inside it, which creates the loop from input to the output that further sends the signal during the time the switch button is pressed. As soon as you release the button, the loop gets disabled all of a sudden. And this process is done automatically. This is how ‘Push to make’ switch works.
How does Push to Break Switch Work?
These ‘Push to Break’ circuits are the normal traditional switches, which are used for various physical arrangements. The push to break ‘membrane’ or ‘momentary’ switches is used in most of the electronic products. This kind of switches performs similar to that of the mechanical type switches which are created from a circuit. Such mechanical switches are ever been used in the products such as remote controllers, and some other electronic devices. Because of installation of such switches, pressing and releasing the buttons becomes easy.
How to Install Momentary Switches through Backlighting?
Usually, there are 2 different ways of using LED lights, which are used in all commercial areas. These LED lights are generally installed as indicator lights in order to emit the bright light. This method of using ‘Optical fiber’ seems to be a great way which is used along with the LED lights. In case, the Momentary Switch is exposed to humidity, it changes as per the temperature. Another option is known as the EL (Electroluminescent Lamps) which are most cost effective when compared to two different types of lighting, as it provides flexibility in terms of colour variation. Somehow, this type of lighting can last up to 8000 hours when compared to the optical fiber that usually last longer till 100,000 hours.
Applications that use Momentary Switches
The practical applications where momentary switches are used are almost all the electronics devices – it can be television, air conditioners, computers, fans, as well as induction cook and ovens, remote controller, and many other devices. These momentary switches have a great demand due to some benefits such as easy to clean and maintenance. The dust on these switches can easily be removed from the outer layer of solid plastic material. Also, the switches are sealed in a proper manner to avoid other substances that enter inside the electric circuits.
Suppose such types of momentary switches are used to balance the extremely low or high temperature, then momentary switches are the right one for you. However, you must think beyond the waterproof momentary switches for the outdoor environment.
Besides these, you will also be able to find these momentary switches in the medical laboratories as well as these are used in most of the medical equipments or portable medical devices. These are absolutely portable in size, as well as last for a longer period and the cost of these switches are too less. And moreover, cleaning becomes much easier when compared to other switches.
Types of Momentary Switches
There are 4 different types of momentary switches which are mentioned as below.
• Non-Tactile Momentary Switches: The Non-Tactile Momentary Switches are the most reliable switches which are economical as well. Somehow, these types of switches won’t provide user direct feedback through the switches. But, such demerits can be covered with the LED indicators. While these Non-tactile switches provide many advantages of creating the keypad regions with custom shapes and sizes.
• Tactile Momentary Switches: There are actually two different types of tactile momentary switches which are namely the ‘stainless steel’ and ‘polyester’. The Tactile momentary switches contain a snap action that is clearly observed by the operator. And the conductive stainless steel snap dome consists of an excellent action, which neglects the need for a flexible upper circuit layer. Domes are actually used in the momentary switches to provide tactile feedback. However, the ‘Hydro’ formed poly-domes presents a tactile response in a lighter way; while, a narrower that manages the temperature varies from the metal dome.
• Mixed Panels Switches: The mixed panels are nothing but the conglomeration of ‘Non-tactile’ and ‘tactile’ switches which are usually mixed in the same panel. And this seems to be much demandable when a large active area is required for the functioning of a particular switch, or due to the hidden maintenance or the programming switches.
• PCB Backed Momentary Switches: The PCB Backed momentary switches are generally the printed circuit boards which can be used for the lower circuit. The board simply gives structural support as well as incorporates several surface mount components, which can be connected to your PCB or sub-contractors that can be used to offer such kind of construction.