Push Button Switch with an Integrated 3V White LED From sayal electronics

I found a helpful electronic component from sayal electronics, which has inbuilt LED and switch it is simple tactile switch. The Push Switch Momentary normally open switch with 3mm LED inbuilt. I actually wonder about the Idea of making this kind of components, which is much more helpful to electronics hobbyist and engineers.

Why Choose an Integrated LED Switch?

In the traditional method, two holes are drilled on the panel for LED indication and the switch. This looks messy and requires more wires to connect. Implementing a 3V LED to the switch provides the perfect solution to reduce space and complex wiring.

What is Push Switch Mom /No 12x12mm White Led 3V

It is a 12x12mm momentary tactile push button switch and a 3V white LED is place on the Top of the switch. The method of adding push switch and LED at same place is very interesting feature of this component.

Push Button Switch with an Integrated 3V White LED From sayal electronics online shop — Figure1. *Momentary tactile switch with inbuilt 3V LED*

Technical Specifications

Push switch with momentary action and Normally opened circuit.
White LED integrated and it uses 3V forward voltage drop.
LED forward current is 15mA to 20mA.
It has printed circuit board straight terminals so easy to solder on through hole.
12×12 mm housing for the button.

The 3V LED Resistor Calculation

If you are connecting the switch to a 5V supply, such as an Arduino or any other microcontroller IC, the LED forward voltage is 3V and 20mA current. So, the LED needs a resistor to limit the current. We can calculate it by using an online series LED calculator tool. I am also providing the manual calculation below:

To find the R value we are using the ohm’s law equation of,

R = \frac{V_{source} – V_{led}}{I_{led}}

For 5V supply The Resistor value will be,

R = \frac{5\text{V} – 3\text{V}}{0.02\text{A}} = 100\,\Omega

Pin Configuration for 12x12mm Lit Tactile Switches

LED Cathode pin – Connected to the negative supply
LED Anode Pin – Connected to the positive supply using Resistor if voltage above 3V.
Switch contacts- The switch pins are normally opened and no contact each other. It initially acts like open circuit.

Applications & Design Benefits

The SWTAC-510439 from sayal electronics gives the perfect tactile switch with inbuilt LED of 3V, This switch can be use in various application such as,