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8-Channel Multiplexer with Pushbutton Inputs and Resistor Network

Image of 8-Channel Multiplexer with Pushbutton Inputs and Resistor Network

Circuit Documentation

Summary

This circuit consists of a SparkFun 74HC4051 8-Channel Multiplexer Breakout, multiple pushbuttons, and resistors. The pushbuttons are connected to the multiplexer through resistors, allowing for the selection of different input channels. The circuit is designed to interface multiple pushbuttons with a single input pin on a microcontroller or other digital logic device.

Component List

  1. SparkFun 74HC4051 8-Channel Multiplexer Breakout

    • Description: An 8-channel analog multiplexer/demultiplexer.
    • Pins: Y7, Y6, Y5, Y4, Y3, Y2, Y1, Y0, GND, VCC, VEE, !E!, S2, S1, S0, Z

  2. Pushbutton

    • Description: A simple pushbutton switch.
    • Pins: Pin 3 (out), Pin 4 (out), Pin 1 (in), Pin 2 (in)

  3. Resistor

    • Description: A resistor with a resistance of 2000 Ohms.
    • Pins: pin1, pin2

Wiring Details

SparkFun 74HC4051 8-Channel Multiplexer Breakout

  • VCC is connected to:

    • Pin 4 (out) of all pushbuttons

  • GND is connected to:

    • pin2 of all resistors

  • Y7 is connected to:

    • pin1 of a resistor
    • Pin 2 (in) of a pushbutton

  • Y6 is connected to:

    • pin1 of a resistor
    • Pin 2 (in) of a pushbutton

  • Y5 is connected to:

    • pin1 of a resistor
    • Pin 2 (in) of a pushbutton

  • Y4 is connected to:

    • pin1 of a resistor
    • Pin 2 (in) of a pushbutton

  • Y3 is connected to:

    • pin1 of a resistor
    • Pin 2 (in) of a pushbutton

  • Y2 is connected to:

    • pin1 of a resistor
    • Pin 2 (in) of a pushbutton

  • Y1 is connected to:

    • pin1 of a resistor
    • Pin 2 (in) of a pushbutton

  • Y0 is connected to:

    • pin1 of a resistor
    • Pin 2 (in) of a pushbutton

Pushbutton

  • Pin 4 (out) is connected to:

    • VCC of the SparkFun 74HC4051 8-Channel Multiplexer Breakout

  • Pin 2 (in) is connected to:

    • pin1 of a resistor
    • Corresponding Y pin of the SparkFun 74HC4051 8-Channel Multiplexer Breakout

Resistor

  • pin1 is connected to:

    • Pin 2 (in) of a pushbutton
    • Corresponding Y pin of the SparkFun 74HC4051 8-Channel Multiplexer Breakout

  • pin2 is connected to:

    • GND of the SparkFun 74HC4051 8-Channel Multiplexer Breakout

Documented Code

There is no code provided for this circuit.