Each student deisgns and makes an ElectroCity: a cutomized scene or device that includes circuits to create light, sound and/or motion.
Photocopy worksheet and assessment (downloadable at bottom of page)
Bring in a sample ElectroCity that you or a student has made
Motors, AA batteries, hook-up wire, wire strippers, materials for making switches
LEDs, coin batteries, buzzers, rubber bands, tape
cardstock, craft materials
1. Planning an ElectroCity: An ElectroCity is a scene that uses light, sound and/or motion to make it come alive. Students will be creating their own ElectroCities, using any of the materials they have learned about.The first step is to decide on the scene and the electrical devices to use, such as LEDs, buzzers and motors. Students should begin by writing descriptions and making drawings of their ElectroCity ideas.
2. Electrical design: As part of their ElectroCity plans, students will need to design circuits for LEDs, buzzers and/or motors. Review the importance of switches, and remind students of the one rule:
Every circuit should be controlled by a switch.
Review the use of standard circuit symbols and diagrams. Ask students to design the circuits they will use in their ElectroCitites, and record them by means of circuit diagrams.
3. Making the ElectroCity: Provide time for students to create and test their designs.
4. Troubleshooting: It is likely that some circuits will not work. Review the concept of troubleshooting, which wasintroduced in Lesson 2, in the course of making switches. Review the troubleshooting chart from that lesson: when an issue arises, the first step is to find the cause of the problem. Once the cause is identified, it is usually not too hard to come up with the fix.
Howework -- A Hidden Switch Hunt: In preparation for Lesson 6, ask students to conduct a hunt for hidden switches. These are switches that you operate by doing something else, such as by opening or closing a refrigerator door . They can use the worksheet to record the examples they find.
In case students have difficulity coming up with ideas for ElectroCities, you can:
Show students an ElectroCity you or your students have made;