Introducing the rpi_led_simulator gem

require 'rpi_led_simulator'

# the symbol ● represents the round LED or ▋ to represent a bar LED
rpi =, symbol: '')

rpi.pins.first.blink duration: 3;


Here's a quick video, showing a virtual LED blinking for 4 seconds.

I was motivated to write this gem after experimenting with a super bright LED bar graph which wasn't good for my eyes to look at for any length of time. I could of course reduced the brightness, however that would have taken more effort in searching around for other resistors etc.