AND logic using NAND gates

AND logic is a basic digital logic. There is a specific gate for this logic, the AND gate. An AND gate gives a digital HI output only when all of its input are HI. The result of the project is digital circuit using NAND gates that implement the AND logic. A LED turns on only while both the two buttons are pressed.

Objective

The project is an introduction to digital circuits.

  • You see how breadboards, resistors, push buttons, ICs and LEDs look like.
  • You understand how breadboard works.
  • You understand the difference between schematic and real circuit.
  • You understand the difference between digital logic and digital gates.
  • You can notice a way to create digital HI/LO signal.
  • You understand the AND logic.

The Schematic

This is the circuit of the project.

project-AND-logic-with-NAND-gates

 

On breadboard

project-AND-logic-with-NAND-gates-breadboard

 

You can see a way to set up the circuit on the breadboard. Remember, there are many correct ways to transfer a circuit on the breadboard.

Notes

  • The NAND gate is called universal gate because using only NAND gates is possible to get any digital function.

NOT Logic using NAND gate

NOT logic is a basic digital logic. There is a specific gate for this logic, the NOT gate. This gate is also called Inverter. An Inverter gives a digital HI output when its input is LO. When its input is HI then its output return a digital LO.

Objective

The project is an introduction to digital circuits.

  • You see how breadboards, resistors, push buttons, ICs and LEDs look like.
  • You understand how breadboard works.
  • You understand the difference between schematic and real circuit.
  • You understand the difference between digital logic and digital gates.
  • You can notice a way to create digital HI/LO signal.

The Schematic

This is the circuit of the project.

NAND-NOT

On breadboard

project-NOT-logic-with-NAND-gates

You can see a way to set up the circuit on the breadboard. Remember, there are many correct ways to transfer a circuit on the breadboard.

Notes

  • The NAND gate is called universal gate because using only NAND gates is possible to get any digital function.