Changes

===Introduction to Sensors===

===Introduction to Sensors===

Sensors enable the microcontroller to sense the surrounding environment. Many sensors exist on the marker, including but not limited to buttons, temperature sensors, pressure sensors, photoresistors, humidity and moisture, and many more. The output of the sensor (a voltage) changes based on the measured environment properties, and sends that signal over to the Arduino board.    

Sensors enable the microcontroller to sense the surrounding environment. Many sensors exist on the marker, including but not limited to buttons, temperature sensors, pressure sensors, photoresistors, humidity and moisture, and many more. The output of the sensor (a voltage) changes based on the measured environment properties, and sends that signal over to the Arduino board.          

== Online Simulators ==

== Online Simulators ==

To start putting a circuit together, the user can drag the components from the library and place it in the “building zone”, noted above. In addition, note the “Code” button in the top bar; this button enables the users to program the Arduino to perform specific functions. To start the simulation, the “start simulation” is available in the top tab.

To start putting a circuit together, the user can drag the components from the library and place it in the “building zone”, noted above. In addition, note the “Code” button in the top bar; this button enables the users to program the Arduino to perform specific functions. To start the simulation, the “start simulation” is available in the top tab.