Data Sheet

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72. LEDs are less “Buggy”
Build the circuit shown on the left, turn on the switch (62) or the press
switch (61) and you can light up both LEDs at the same time. If you want
to turn off the two LEDs, you must turn off both the switches.
You may have noticed in the summertime at night, lots of bugs ying
around your porch lights, especially if they are not LED lights but are
incandescent lights. Try switching those incandescent lights to LED
lights. LEDs don’t attract as many insects as other traditional light
sources as they have very little Ultra Violet (UV) content which bugs
are attracted to.
73. Triple Input ‘AND’ Gate
Build the circuit shown on the left, turn the switch (62) ON, press and
hold the press switch (61) to turn it ON, and move the magnet (7)
towards the reed switch (83). Only when all three switches (INPUTS)
are ON (True) will the lamp (76) (OUTPUT) be ON (True).
Electronic AND Gates can have two or more inputs but the function is
still the same. All inputs must be True (ON) for the output to be True
(ON).