Section outline

  • Kia ora...

    This week we will continue learning about the 555 timer integrated circuits.

         

    Big Idea:

    555 timer model

    Learning Intentions: 

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

    Achievement Objectives: Enter AO's here

    Success Criteria: I can/have...

    construct a working prototype circuit using a 555 IC

    Activities:

    1. insert the 555 into the breadboard, connect the power supply connections
    2. test for a voltage between the power pins, pin 1 = negative and pin  8 = positive
    3. when a voltage has been established, disconnect the 9V battery
    4. look at the Tinkercad circuit diagram, learn the component symbols and where the components are connected to
    5. insert the components as per the bread board diagram - connection wires must be straight and flat on the board - NO SPAGHETTI WIRES 
    6. the switch will be made from two pieces of hook-up wire
    7. test it, LED should be on and then off for about 1 second



    You may find this website useful: http://www.555-timer-circuits.com/

    diagrams and pictures are loaded on your weekly course page