Term3 Week7

Kia ora...

Welcome back to the digital technology course. I hope you have had a great school break and recharged your batteries for a new term.

Welcome to term2.

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

Learning Intentions: 

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

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
8. Replace the capacitor 100 microfarad with 1000 microfarade and the LED will be on for 10 sec.