Since it has two possible positions, and three pins, you have a connection between pin 1 and 2 when position 1 is selected, and between pin 1 and 3 when position 2 is selected. Since the Arduino Uno/nano has internal pullups you can use the 1st method if you want to - 1 less wire to connect!

Below are the 3 pins that form electrical connection with a circuit, each described with their function in the circuit: A 3 pin toggle switch is a simple electronic component that allows you to control the flow of electricity in a circuit. It is commonly used in various electrical devices and systems to turn them on or off. Understanding how a 3 pin toggle switch works can help you in troubleshooting electrical problems or designing your own circuits. However, some important points to look for, when choosing a switch, are: Switch Type, Actuation Force, and Actuation Point and Travel Distance.The 3 pin toggle switch typically consists of three pins – the common pin, the normally open pin, and the normally closed pin. Each pin serves a specific purpose in controlling the flow of electricity. The common pin is where the power source is connected, and it acts as a bridge between the other two pins. The normally open pin allows the current to flow when the switch is in the ON position, while the normally closed pin interrupts the circuit when the switch is OFF. If you’re looking to amplify your gaming setup, and grow your skills, then a keyboard with hot-swappable switches could be the biggest addition to your build! Not only can you build the exact feel of the keyboard that you want, you can also change it on-the-fly, depending on your mood! Essentially, you will have the ability to create the exact keyboard and feel, that you want. No more needing to buy multiple keyboards, instead you can just upgrade yours forever! Well… unless you’re a hot-swappable enthusiast, and that’s another rabbit hole for another day. First of all, turn off the main breaker or related MCB in the main distribution board or consumer unit and make sure the main supply is switched off.

Interestingly enough, even though the two variations are based on pin count, the difference between them has nothing to do with any electrical based pin/connector.

Essential Components of a 3 Pin Toggle Switch

Connect the same LED (flat side) via a resistor (10k to ground). // Example1: 3 pin toggle switch for the Arduino.