MDDN 251: Understanding the shift register circuit using 74HC595N

This is a single shift register using the 74HC595N 8-bit serial parallel shift with 8 LEDs. With the positive and the negative pins it can be translated into the lights on the LCD screen that i have.

Further down on the website there is a double shift register that has 16 LEDs. This will be the circuit that i will need to understand to link it to my LCD screen.

Found on: http://www.codeproject.com/Articles/144606/Arduino-Platform-Working-with-Shift-Registers