Data Sheet

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378. OR Gate Revisited
Build the circuit shown on the left. Note that the heart LED (69) turns
on when either the switch (62) or the press switch (61) are on.
This was discussed as an OR Gate logic in Project #66. OR gates
can also be purchased in ICs. Below is a picture of the pinout for one
example IC that provides four OR gates.
379. NOT Gate
Build the circuit shown on the left. The lamp (76) is off, but if you press
the press switch (61) the lamp (76) will turn on. Note that the heart
LED (69) is on when the press switch (61) is off and the heart LED (69)
turns off when the press switch (61) is on.
This was discussed as a NOT Gate in project #93, and this circuit now
demonstrates how NOT Gate logic works.
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1st level
2nd level
2nd level
2nd level