Clock in and out of locations with Mifare RFID cards for an accurate register of movements on and off site locations. Story I wanted to build a connected device that had the ability to identify and record the movements of people on and off locations. Using an RFID card reader and a Raspberry Pi running …
This project shows how to use the Raspberry Pi to drive a 7 Segment Display with the help of a 74HC595 chip. Parts used in this project: Breadboard Wiring cables (Male-Male, Female-Male) 7 Segement display (it actually has 8 segments because of the dot) 74HC595 Chip Raspberry Pi Revision 2 some Python code Here is …
7 Segment Display with 74HC595 Shift Register and Raspberry Pi Continue Reading
A serial-to-parallel shift register (or SIPO: Serial In Parallel Out) lets you take a sequence of signals on one output, and split them up into several separate outputs. For example, if you don’t have enough GPIO pins on your Raspberry Pi, Arduino, or other computer/microcontroller, you can use a shift register to add more. In …
What is a serial-to-parallel shift register? Continue Reading
This instructable will attempt to explain, in simple terms, what a shift register is, and how you can use it with the Raspberry Pi to expand the GPIO port by running eight outputs with just four GPIO ports. To start with, what is a shift register? Wikipedia has a technical definition of shift registers, but …
