PRODUCTO DESCONTINUADO!!! ULTIMA PIEZA!!! REMATE!!!!
RASPBERRY SHIELD EXPANSION CUADRUPLE
https://pypi.org/project/pi74HC595/
https://forums.raspberrypi.com/viewtopic.php?t=306589
https://docs.sunfounder.com/projects/raphael-kit/en/latest/component/component_74hc595.html
https://docs.freenove.com/projects/fnk0019/en/latest/fnk0019/codes/c-lang/74HC595%20%26%20Bar%20Graph%20LED.html
https://roboindia.com/tutorials/raspberry-shift-register/?srsltid=AfmBOopnF-RBlIXNaNBSaF2pDWy7YuRweZ5aqj9myWzdmtOxy7BRKlKe
