Section outline

  • Kia ora...

    This week we will continue building our actual timer box using the 555 timer and other components

    Big Idea:

    Modelling a timer circuit using 555 timer

    Learning Intentions: 

    use a 555 timer integrated circuit (IC) to operate an output for a specific amount of time

    use mathematics to calculate a time constant


    Success Criteria: I can/have...

    • construct a working prototype circuit using a 555 IC
    • I can vary the timing period by changing input components
    • I can understand a time constant calculation

    Activities:

    Build the actual timer box using 555 timer component, transister, potentiometer and other eloctronic components.