Brief Switch Based OR Logic Gate Digital Circuit

OR logic gates have a high output if at least one input is high. All inputs have to stay low for a low output.

Simple OR logic gate schematic symbol with switch based circuit schematic diagram by electronzap electronzapdotcom
Simple OR logic gate schematic symbol with switch based circuit schematic diagram by electronzap electronzapdotcom

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If switches are connected in parallel, then turning one or more of them on, will also turn on a series load. The load is only off if all of the parallel switches are off.

Truth table:

  • 1 can mean on for mechanical switch based circuits and loads. For transistors or integrated circuits (IC) based digital signals and outputs, 1 tends to mean high, or 5V if that is the voltage that is being used.
  • 0 can mean off for mechanical switch based circuits and loads. For transistors or integrated circuits (IC) digital signals and output, 0 tends to mean low, or 0V if that is the most negative voltage of the circuit.

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