4 Bit Memory Using D Flip-Flop PCB Design

Working of this PCB

In the above image, you can see that we need to connect this PCB with a DC 5-volt power source. On this PCB, four LEDs are connected, representing the output states of all four D flip-flops. Additionally, there are four DIP switches connected to the PCB, allowing us to apply a clock to the clock input of all four D flip-flops. A push switch is also connected, serving as a clock input for all four D flip-flops. Clock pulses can be applied to all four D flip-flops by pressing this push switch.

Truth table

How to store data in this PCB

Let's assume that we need to load or save the data 1111 in this 4-bit memory. To achieve this, we first need to turn ON all four DIP switches to apply a high logic level to the inputs of all four D flip-flops. Afterward, we apply a clock pulse by pressing the push switch. At this point, the data is loaded into the 4-bit memory. We can then release the push switch, and the output will remain 1111. The 4-bit memory retains the loaded data until new data is loaded. To load new data, we press the clock switch again. Attempting to load new data without pressing the clock switch will not change the output, and it will remain the same as the previously loaded data.

Front and back side view of this PCB

How to download this PCB

You can download the Gerber file of this PCB from below download link. You will also get schematic file with this Gerber file.

Download Gerber File