AMSTI CircuitsAMSTI CircuitsLesson 14Lesson 14

OverviewOverview

Semiconductor diode = allows electricity to flow in one direction

Examples: battery chargers, radios, computers, and televisions

Consist of cylindrical piece (functional piece) with a wire (connectors) coming out each end

Arrow in symbol shows direction of electricity

Colored band on one end of the diode corresponds to the direction of the current

MaterialsMaterials

Box with batteries, battery holders, bulbs, bulb sockets, wires, and switch

Diode

2 Fahnestock clips

Take apart flashlight

Create a circuit tester using 2 batteries and one bulb and make sure the bulb works

Give each pair of students a diode and touch it against the wires to test

Look closely at the diode. What do you think might be the reason that some bulbs light and others do not?

Reverse the way you put your diode on and see what happens

Introduce the symbol used to draw a diode.

Draw a circuit diagram.

Extension Extension

Put the diode and your switch (used to make the flashlight) into the circuit using 2 batteries and one bulb. Can you connect it so the switch turns the light on and off?

The End!!!The End!!!