Normally driving an LCD requires seven connections to pins on the display, but by using a shift register, [Phillip Warner] at Arduino Playground was able to drive an LCD using only 3 wires. The method ...

The ubiquitous LCD (and VFD) modules based on the HD44780 controller IC can require up to 12 lines from the host. This hardware interface Design Idea reduces the connection to just one wire, allowing ...

This hack is a bit older, but one aspect of the setup makes it worth sharing. Shift registers are a common component to include in a project when you need to increase the number of I/O pins available.

HD44780 LCDs are the most popular alphanumeric displays in embedded systems. The only downside is that they use six I/O pins in 4-bit nibble mode and as many as 11 pins in 8-bit mode. Earlier Design ...

I have a Dell Inspirion 2650. In the last week or two the backlight has been going off from lid movement. It progressively came back on less frequently as I would move the lid to bring it on again.