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https://www.insidegadgets.com/projects/shift-register-breakout-board/
595 Shift Ease – 74HC595 Shift Register Breakout Board « insideGadgets
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https://www.instructables.com/Multiplexing-with-Arduino-and-the-74HC595/
Multiplexing With Arduino and the 74HC595 : 14 Steps (with Pictures) - Instructables
Oct 28, 2017 - Multiplexing With Arduino and the 74HC595: The 74HC595 is an easy and inexpensive (at about 60 cents apiece) way to increase the number of digital out pins on...
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https://www.adafruit.com/product/450
74HC595 Shift Register - 3 pack : Adafruit Industries, Unique & fun DIY electronics and kits
Add lots more outputs to a microcontroller system with chainable shift registers. These chips take a serial input (SPI) of 1 byte (8 bits) and then output...
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https://www.sparkfun.com/sparkfun-shift-register-breakout-74hc595.html
SparkFun Shift Register Breakout - 74HC595 - SparkFun Electronics
SparkFun Electronics is an online retail store that sells the bits and pieces to make your electronics projects possible.
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