LEDs are a popular choice for lighting solutions because of their energy efficiency and environmental friendliness. They are also widely used in electronic circuits as indicators, displays, and light sources. The 3 pin LED switch is a type of switch that is commonly used in DIY electronics projects. It is a simple device that allows you to turn on and off an LED with a push button. In this article, we will discuss the wiring diagram of a 3 pin LED switch and how to connect it to an LED.
What is a 3 Pin LED Switch?
A 3 pin LED switch is a momentary switch that has three pins. The pins are usually labeled as “NO”, “COM”, and “NC”. “NO” stands for Normally Open, “COM” stands for Common, and “NC” stands for Normally Closed. The switch has a spring-loaded button that returns to its original position after it is released. It is called a momentary switch because it only completes a circuit for a short period of time when the button is pressed.
NO Pin
The NO pin on the switch is connected to the positive terminal of the power source. When the button on the switch is pressed, the NO pin makes a contact with the COM pin, and the circuit is completed. When the button is released, the circuit is broken again, and the LED turns off.
COM Pin
The COM pin on the switch is the common connection point for the circuit. It is connected to one end of the LED. When the NO pin makes a contact with the COM pin, the circuit is completed, and the LED receives power.
NC Pin
The NC pin on the switch is connected to the negative terminal of the power source. When the button on the switch is not pressed, the NC pin makes a contact with the COM pin, and the circuit is completed. When the button is pressed, the NC pin breaks the contact with the COM pin, and the circuit is broken, and the LED turns off.
Wiring Diagram of a 3 Pin LED Switch
The wiring diagram of a 3 pin LED switch is quite simple. You need to connect the NO pin to the positive terminal of the power source, the NC pin to the negative terminal of the power source, and the COM pin to one end of the LED. The other end of the LED is connected to the negative terminal of the power source. You can use a resistor in the circuit to limit the current flowing through the LED and avoid damaging it.
| Pin | Connection |
|---|---|
| NO | Positive Terminal of Power Source |
| COM | One End of LED |
| NC | Negative Terminal of Power Source |
FAQs
What is the function of a 3 pin LED switch?
A 3 pin LED switch is a momentary switch that allows you to turn on and off an LED with a push button.
What does NO, COM, and NC stand for?
NO stands for Normally Open, COM stands for Common, and NC stands for Normally Closed.
How do you wire a 3 pin LED switch?
You need to connect the NO pin to the positive terminal of the power source, the NC pin to the negative terminal of the power source, and the COM pin to one end of the LED. The other end of the LED is connected to the negative terminal of the power source.
Do I need a resistor in the circuit?
Yes, you should use a resistor in the circuit to limit the current flowing through the LED and avoid damaging it.
Can I use a 3 pin LED switch with other components?
Yes, you can use a 3 pin LED switch with other electronic components. It is a versatile switch that can be used in many DIY electronics projects.
Where can I buy a 3 pin LED switch?
You can buy a 3 pin LED switch from electronic component stores or online retailers.
With the above information, you should be able to wire a 3 pin LED switch to an LED and use it in your DIY electronics projects. However, always take appropriate safety measures when working with electricity and electronic circuits.
