Brief NOT Logic Gate made from a NAND Universal Circuit

NAND logic Gates are universal logic gates. With enough of them, you can make any other logic gate.

  • It only takes one NAND logic gate to make a NOT logic gate.
Simple NAND logic gate with inputs tied together makes a NOT gate schematic diagram by electronzap electronzapdotcom
Simple NAND logic gate with inputs tied together makes a NOT gate schematic diagram by electronzap electronzapdotcom

Below is a High Speed CMOS (HC) logic gate integrated circuit kit like mine. An Amazon affiliate link ad.


Video:

NAND gate:

  • All inputs need to be high in order for the output to be low.
  • One or more low input equals a high output.
7400 74HC00 quad 2 input NAND gate IC demonstration circuit schematic and pin layout diagram by electronzap
7400 74HC00 quad 2 input NAND gate IC demonstration circuit schematic and pin layout diagram by electronzap

Connecting all inputs together means that all inputs are either high (for a low output), or they are all low (for a high output). Therefore the other options to have one input high while the other is low are eliminated.

You can get integrated circuits (ICs) that have NAND gates with more than 2 inputs in them.

Video:

NOT gate:

7414 hex schmitt trigger inverter NOT logic gate integrated circuit IC 74HC14 demonstration circuit schematic diagram by electronzap
7414 hex schmitt trigger inverter NOT logic gate integrated circuit IC 74HC14 demonstration circuit schematic diagram by electronzap
  • High input = low output.
  • Low input = high ouput.
  • Schmitt trigger versions have hysteresis.
  • Hysteresis is a small range of voltages between 2 trigger voltages where the output stays in whatever state it was last put into. Doing so prevents undesired repeated switching/oscillation that is common while the signal voltage is close to a single trigger voltage.

Video:


Brief Circuit Schematics with Short Video List of Pages

To support this site, check out the following links:

Home page

  • Information on this site is not guaranteed to be accurate. Always consult the manufacturer info/datasheet of parts you use. Research the proper safety precautions for everything you do.
  • Electronzap is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to amazon.com.