Example 03: Multiplexed signal readings

Additional documentation for an example supplied with the KeyDetector library that demonstrates how to encode digital signal into single analog line and decode it using library.

• About
• Parts List
• Multiplex
• Demultiplex
• Run

About

Parts List

• Arduino Pro Mini (ATmega328/3.3V/8MHz) or compatible
• Arduino UNO or compatible
• USB Host Shield for Arduino Pro Mini
• Two 10kOhm resistors
• Four 20kOhm resistors
• Two 1MOhm resistors
• Two 100nF capacitors

Multiplex

3-bit DAC

RC Low-pass Filter

Schematic

Breadboard

Sketch

Demultiplex

Schematic

Breadboard

Sketch

Run