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(Discover different types of switches
and how they work.)
Make and investigate both circuits.
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Design and make
1. A lighting system for a refrigerator: the light turns on
when the door opens and turns off when it closes. |
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Investigate
1. Do the two circuits work differently?
2. Why do you think one way of wiring up the switch is called
"normally open"?
3. Why do you think one way of wiring up the switches is called
"normally closed"?
4. How does this switch compare with the operation of the push
button and the slide switches? |
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Things you need
1. Base Board
2. 6v Tronix Battery Holder
3. 4x 1.5v AA Batteries
4. Wire
5. 6v Tronix Lamp
6. One Tronix Micro Switch |
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