Datasheet-1

Project 65
Relay Magnetic Energy Released
Build the circuit, then push and release
the press switch (S2) while watching
the white LED (D6).
The relay (S3) has a coil with a mag-
netic field, just like the electromagnet
(M3). The lamp does not have a coil or
a magnetic field. so the white LED will
not light with the lamp in the circuit.
Replace the relay (S3) with the lamp (L4). Does the white LED flash?
Project 66
Reed Switch
The reed switch is an electrical switch that can be
controlled by a magnet. It has two metal contacts
close together inside a glass tube. The magnetic
field from the magnet makes the contacts come
together, completing a circuit just like other
switches do.
Place the magnet next to the reed switch (S9) to
activate it, turning on the lights (D6 & L4).
What could you use a reed switch for?
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