Expander - PCF8574

Using an PCF8574 Expander as a Virtual Board (WaveShare 8 Pin Digital IO)

Breadboard for "Expander - PCF8574"

Fritzing diagram: expander-PCF8574.fzz

 

Run this example from the command line with:

node eg/expander-PCF8574.js 

const { Board, Expander, Leds } = require("johnny-five"); const board = new Board(); board.on("ready", () => { const virtual = new Board.Virtual( new Expander("PCF8574") ); const leds = new Leds( Array.from(Array(8), (_, pin) => ({ pin, board: virtual }) ) ); leds.blink(500); board.repl.inject({ leds }); }); 

 

Component Classes in this example: