![]() How to Program a Push Button on the Arduino Then we will use the digitalWrite() function to set pin 11 high, making the LED light up. We will use the digitalRead() function to detect when that happens. When the button is pressed, current will flow to pin 7 making it go high. One side of the push button is connected to 5 volts, and the other side is connected to pin 7. The current limiting resistor value can be anything from 200 Ohms to 1K Ohms. These are the parts needed to build the project:įollow this diagram to connect the circuit: The LED is just an example, you can use this circuit to control any device powered by a 5 volt signal. To demonstrate how to control devices with a push button, let’s build a circuit that turns on an LED when the button is pressed. When the button is pressed, the circuit is closed between the pins on each side and current is allowed to flow between them: Example Project The button itself has an electrically conductive piece of metal attached to it. The pins on each side of the button have electrical contacts inside the button housing. The push button we will use in this article is also known as a tactile switch or momentary push button: Push buttons are available in a variety of different formats: It includes all of the parts, wiring diagrams, code, and step-by-step instructions for 58 different robotics and internet of things projects that are super fun to build! Introduction to Push Buttons ![]() The 3-in-1 Smart Car and IOT Learning Kit from SunFounder has everything you need to learn how to master the Arduino.
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