Data Sheet

-53-

76. Series-Parallel Circuit Paths (II)

Build the circuit shown on the left. There are two ways to light the lamp

(76) in this circuit. You can either press the switch (62) or place the

magnet (7) next to the reed switch (83) and press the press switch

(61).

Using the hotel analogy from the last project, the reed switch (83) could

represent the key card holder and the press switch (61) could be a

switch for a light in the room. But this room now has a master key card

holder that only the employees (e.g. maids) at the hotel have keys for

that turns on all the lights in the room regardless of what switches are

turned on or off in the room.

77. Three-person Rocket Launch

Build the circuit shown on the left. In this circuit, pretend the LEDs

are a rocket. To launch the rocket the switch (62) must be ON, AND

the press switch (61) must be ON, AND the reed switch (83) must

be turned ON with the magnet (7). Systems like this with the switches

setup in three different rooms are used to prevent accidental rocket

launching.

1st level