LED Push Buttons. 39 Comments . by: Caleb Kraft. January 29, 2009. ... if project use some micro controller then I would go one step further to eliminate mechanical parts and use LED for output ...

How do you turn an LED on and off with a button on Arduino? We set the pinButton variable as integer 8 and we connect the button at pin 8 on the Board. Then the LED is connected to pin 2 using the ...

The calculator has 16 LEDs, nine buttons and a slider switch, but they are all controlled and read through just five IO pins on the STM8S001J3 controller that runs the device.