Registres à décalage

https://www.youtube.com/watch?v=6fVbJbNPrEU : How Shift Registers Work! Kevin Darrah

https://www.youtube.com/watch?v=nXl4fb_LbcI : How to Control a Ton of Inputs using Shift Registers! Kevin Darrah

74HC595 chez digikey

https://www.youtube.com/watch?v=hR6qOhUeKMc : How To - Expand Digital Inputs with the 74HC165 + Test Code Kevin Darrah

74HC165 chez digikey