This example introduces the Extension board, a sensor and Dashboard Blocks. An on screen switch is used to turn a buzzer ‘ON’ and ‘OFF’. Please use the wiring and block diagrams below for guidance.
An important programming concept introduced in this example is a ‘variable’. Variables are used by programs to memorize numbers, ON/OFF states, text and many other things. When choosing a name for a variable, find something meaningful, so the name will remind you of the variable’s purpose. The same program can be used to control an LED, try to add a Set LED block, so it will shine while the buzzer is silent.