The button sketch uses a single button press to light an LED. The button sketch introduces the concept of Input and Conditional execution of code.
Arduino Sketch ( INO File ) – No Comments Version
How the Momentary PushButton works
Pull Down Resistor
A Pull Down Resistor is used on this project to set the “default value” of the Pin on the Arduino. When you desing a circuit you can use a PullDown or a PullUp resistor. The PullDown is a resistor that connects the pin to ground “pulls” the voltage of the pin to Ground. Conceptually it sets the value of the pin to Zero or False. It is therefare a good way to think of it as setting the dfault value to Zero or False.
A PullUp Resistor does to the inverse. The pullup resistor connectors the pin of the Arduino to 5 Volts or 3.3 Volts , dpending on which you are using, to set the default value to One or True.
- Arduino UNO
- 1 – 5mm LEDs
- 1 – Momentary Pushbutton
- Hookup Wire
- Jumper Wires
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