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Push Button

Kingston hackSpace

There are many different types of buttons and they allow you to control a DC power source, by simply cutting the voltage. Push-button is the simplest type of button; the breakout uses a latching analog circuit that is triggered by a push of the button. Press once to turn on, and then press again to turn off. There are already pre-made modules that can be used with a microcontroller, however in the example below we will you normal push-button to and wire it up using breadboard.

The button works fine with 3V and it can go up to 14V, in this case we will use 5V from the Arduino. We also need to wire a ground, which will complete the circuit; it is safer to connect a 10K pull-down resistor between the GND and button. Also in this example we will add a signal form a button to Arduino that will be connected to any of the digital pins. In this case we can measure the on/off signal on the computer.

  • Code for using the push button with a serial connection via arduino to a processing sketch can be found here

  • Datasheet for the push button can be found here