Section outline

  • Kia ora...

    This week we will continue learning about the 555 timer integrated circuits. We will use the variable resistor (potectiometer) to control the time and we will start building our own timer

    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 using 555 timer component, transister, potentiometer and other eloctronic components.