#004 Pushbutton LED Switch

Momentary push button switch is used to toggle the LED on and off.

Notes

A simple circuit showing how to wire a pushbutton with a pull-down resistor for a digital input that is normally low but pulls high when pressed.

Pressing the button will toggle the LED between on and off. See LEAP#692 for how to achieve a similar result with a simple 555 timer chip.

The Sketch

The PushbuttonLED.ino sketch:

• reads the push-button digital input
• toggles the LED output state between ON and OFF when a button press is detected
• logs to serial output so one can inspect the behaviour

Construction

Credits and References

• Based on the Arduino Pushbutton example
• 4 Pin DIP PCB Momentary Push Button Tactile Switch