Design with 3104 push button in Cirkit DesignerThe 3104 push button is a momentary switch that is widely used in electronic circuits. When the button is pressed, it closes the circuit, allowing electric current to flow through. Upon release, the button returns to its default position, opening the circuit and stopping the current. This simple yet versatile component is commonly found in applications such as input devices, control panels, and hobbyist projects, including interfacing with microcontrollers like the Arduino UNO.
This circuit consists of a 40-pin connector interfacing with four pushbuttons and a UBS power supply. The pushbuttons are used as inputs to the connector, which then relays the signals to other components or systems. The UBS power supply provides the necessary 24V power to the pushbuttons and the common ground for the circuit.
Open Project in Cirkit Designer
This circuit consists of a 24V power supply unit (PSU) connected to four pushbuttons. Each pushbutton is wired such that pressing it will send a 24V signal to a corresponding general-purpose input (GP In) on a 40-pin connector. The common return path for the pushbuttons is connected to the 0V of the PSU, which is also connected to the common (Com) for input pins on the 40-pin connector, completing the circuit for each button press.
Open Project in Cirkit Designer
This circuit uses a SparkFun 74HC4051 8-Channel Multiplexer to read the states of eight pushbuttons. Each pushbutton is connected to a corresponding input channel on the multiplexer through a 2k Ohm resistor, allowing the multiplexer to sequentially read the button states and output them to a single data line.
Open Project in Cirkit Designer
This circuit consists of a General Purpose Input/Output (GPIO) plug connected to four pushbuttons. Each pushbutton is wired to a unique input pin on the GPIO plug, allowing the state of each button (pressed or not pressed) to be detected individually. The common terminals of the pushbuttons are interconnected and likely serve as a ground or reference voltage connection.
Open Project in Cirkit Designer| Pin Number | Description |
|---|---|
| 1 | Terminal 1 (Contact) |
| 2 | Terminal 2 (Contact) |
Note: The pins are usually interchangeable since the push button acts as a simple switch.
To use the 3104 push button in a circuit:
Below is an example of how to use the 3104 push button with an Arduino UNO:
// Define the pin connected to the push button
const int buttonPin = 2;
// Define the pin for the LED
const int ledPin = 13;
// Variable for reading the push button status
int buttonState = 0;
void setup() {
// Initialize the LED pin as an output
pinMode(ledPin, OUTPUT);
// Initialize the push button pin as an input
pinMode(buttonPin, INPUT_PULLUP);
}
void loop(){
// Read the state of the push button value
buttonState = digitalRead(buttonPin);
// Check if the push button is pressed
// if it is, the buttonState is LOW
if (buttonState == LOW) {
// Turn on the LED
digitalWrite(ledPin, HIGH);
} else {
// Turn off the LED
digitalWrite(ledPin, LOW);
}
}
Note: The INPUT_PULLUP mode enables the internal pull-up resistor, which is a best practice for push button circuits.
Q: Can I use the 3104 push button with AC voltage? A: No, the 3104 push button is rated for DC voltage only.
Q: How can I prevent "bouncing" when the button is pressed? A: Implement a debounce algorithm in your code or use a capacitor and resistor to create a hardware debounce circuit.
Q: Is it necessary to use a resistor with the push button? A: Yes, using a pull-up or pull-down resistor is recommended to ensure a defined logic level when the button is not pressed.
For further assistance, please refer to the manufacturer's datasheet or contact technical support.