Data Sheet

-22-
17. Parts Connected in Parallel
Build the circuit on the left and turn the switch (62) ON.
The heart LED (69) and the bi-directional LED (71)
will both be on. Notice that both the heart LED (69)
and bi-directional LED (71) are bright. This is because
the heart LED (69) and bi-directional LED (71) in this
circuit are in parallel, allowing each to have separate
paths for current ow.
18. Press Lights
Replace the switch (62) with the press switch (61),
then press the press switch (61) and you will see the
two LEDs are shining with red light. Release the press
switch (61) and the LEDs will turn off. Circuits like this
are used in many infant toys where kids push a buttons
that make lights turn on.
19. Blind Spot Simulator
Replace the switch (62) with the reed switch (83), then
touch the reed switch (83) with magnet (7) and you will
see both LEDs are shining with red light. If you move
away the magnet (7), they will be turned off. This circuit
simulates the way blind spot sensors in cars work. As
you move the magnet towards the reed switch (83) you
are simulating a car entering your blind spot that makes
a red light in your car come on.