Download Arduino and LEGO Projects by Jon Lazar PDF

By Jon Lazar

We all know the way notable LEGO is, and an increasing number of individuals are getting to know what number extraordinary belongings you can do with Arduino. In Arduino and LEGO Projects, Jon Lazar indicates you ways to mix of the best issues on the earth to make enjoyable instruments like a Magic Lantern RF reader, a sensor-enabled LEGO tune field, or even an Arduino-controlled LEGO teach set.

  • Learn that SNOT is really cool (it skill Studs now not on best)
  • See targeted reasons and pictures of ways every thing matches jointly
  • Learn how Arduino suits into each one venture, together with code and reasons

Whether you must provoke your mates, annoy the cat, or simply sit back and delight in the awesomeness of your creations, Arduino and LEGO Projects indicates you simply what you wish and the way to place all of it jointly.

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Example text

You can approximate that look by having a layer beneath the first layer that brings the ring one stud in. The center brace must be reinforced by using an alternate layout that is four studs wide. Figure 2-10 shows what the ring looks like while Figure 2-11 shows what the ring looks like when installed on the bottom of the first ring. Figure 2-10. The smaller ring goes beneath the first ring Figure 2-11. The smaller ring placed beneath the two rings that were previously assembled The next level of the body will hold the Arduino in place.

A long is a 32-bit number, which also allows decimal places, so a number between −2,147,483,648 and 2,147,483,647 can be returned. The long microseconds in the parentheses allows a number to be passed and referred to like a regular variable, but the value of the microseconds variable is passed in the call to the function, in this case duration because it is between the parentheses. Any processing done within the function is contained within that function. Any change to variables within the function does not impact the rest of the program unless a value is returned.

In the function microsecondsToInches(), you are doing some fairly simple mathematics, so you are doing the math and returning the value on the same line. You could do more complex processing and set the value to a variable, then have the code read return variable to export the answer from the variable rather than directly from the line of code. In your function, you are dividing the number of microseconds it takes sound to travel an inch and dividing by two, since the duration takes into account the time it takes the pulse to travel to and from the object the sound waves are bouncing off of and returning that value to the function call.

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