May 2020

In this lesson, we will build upon what we’ve already done by adding a servomotor. Remember, my goal was to simulate a railroad crossing by having two flashing LEDs for the signpost, two LEDs for the crossbar that drops down across the road, and the bar itself to lower and…

In this lesson, we will build upon Lesson 6 by changing our code to make the pushbutton act as a toggle switch. What that means is that previously, when we pressed the button, the LEDs lit and when we released the button, the LEDs turned off. The desired behavior for…

Okay, so in the last lesson, we learned to use a pushbutton to have our LEDs start blinking. The code used the delay(int millisecondsToWait) function to create the blinking effect. However, I noticed that when the button was released, the way the code was written, the delay for HIGH and…