74hc595 Shift Register
Fleeting- External reference: https://peppe8o.com/using-74hc595-shift-register-with-raspberry-pi/
Using 74hc595 Shift Register with Raspberry PI
some projects requires so many connections with many sensors/devices that the rich 40-PIN GPIO can become limited. In these cases you can get help from a simple and cheap electronic piece: the Shift Register or Serial to Parallel Converter.
— https://peppe8o.com/using-74hc595-shift-register-with-raspberry-pi/
sn74hc595n vs 74hc595
- External reference: https://www.reddit.com/r/arduino/comments/f317jo/sn74hc595n_vs_74hc595/
For example, “SN5400N” signifies that the part is a 7400-series IC probably manufactured by Texas Instruments (“SN” originally meaning “Semiconductor Network”[27]) using commercial processing, is of the military temperature rating (“54”), and is of the TTL family (absence of a family designator), its function being the quad 2-input NAND gate (“00”) implemented in a plastic through-hole DIP package (“N”)
— https://www.reddit.com/r/arduino/comments/f317jo/sn74hc595n_vs_74hc595/