Data Sheet

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57. Light Power
Build the circuit as shown on the left and you will light
up the two LEDs at the same time. If you turn on the
switch (62) now, the two LEDs will be turned off, while the
lamp (76) will still be on and will be brighter.
Light power can be measured in Watts or Lumens. Watts
refer to how much energy the bulb uses while Lumens are
a measure of the bulb’s light output intensity.
58. Visual Effects
Replace the switch (62) with the press switch (61). The
two LEDs will still be on. If you press the press switch (61),
you will light up the lamp (76) while turning off the LEDs.
Circuits like this could be used in toys where you can get
cool visual effects where certain lights come on while other
lights go off when you press a button.
59. Earth is a Magnet
Replace the switch (62) with the reed switch (83). The two
LEDs will still be on at the same time. Now touch the reed
switch (83) with the magnet (7) and you will light up the
lamp (76) and the two LEDs will be turned off.
Did you know that the Earth is like one big bar magnet? It
has a magnetic north and a magnetic south, which is what
enables a compass to point in the direction of the north
pole.
2nd level
1st level
2nd level