128x64 Full Graphic Smart LCD Controller Kit - with RAMPS 1.4 Adapter & Cables

Specifications

• Display Type: Dot Matrix LCD (Liquid Crystal Display)

• Resolution: 128 x 64 pixels

• Backlight Color: Blue LED with White Pixels

• Control Interface: Rotary Encoder (Push-to-select)

• Memory Interface: Standard SD Card Reader (on back of LCD)

• Audio Feedback: Active Buzzer (Beeper)

• Compatibility: RAMPS 1.4, RAMPS 1.5, RAMPS 1.6, MKS Gen L, SKR V1.3/V1.4 (with correct EXP pinouts)

• Firmware Support: Marlin, Repetier, Klipper

Downloads:

• 3D Printer Smart LCD Display Controller_Code and Links

Key Applications and Projects

• DIY RepRap 3D Printers: Serving as the primary human-machine interface (HMI) for custom Prusa i3, CoreXY, or HyperCube builds.

• Laser Engravers: Providing offline SD-card cutting capabilities for custom diode laser rigs utilizing GRBL or Marlin.

• Filament Extruders: Monitoring heater temperatures and motor speeds on homemade plastic filament extrusion and recycling machines.

Unlock New Capabilities (Project Evolution)

• The Custom Firmware Makeover: The 128x64 graphic screen doesn't just show data; it can show art. Evolve your machine! Once you are comfortable flashing Marlin firmware via the Arduino IDE, you can use the U8glib library tools to convert any black-and-white 128x64 pixel bitmap image into code. You can literally program the screen to display your own custom logo, your name, or a funny graphic every time you boot up the printer!

Package Includes:

• 1 x 128x64 Full Graphic Smart LCD Controller Board

• 1 x Smart Adapter V1.0 (for RAMPS connection)

• 2 x Ribbon Cables (FC-10P)

FREQUENTLY ASKED QUESTIONS (FAQ)

1. What is the exact name of this display in 3D printing communities? It is almost universally known as the "RepRapDiscount Full Graphic Smart Controller."

2. Do I need my computer connected to print if I have this? No! That is the primary benefit. You put your G-code on an SD card, plug it into the back of the LCD, and print completely standalone.

3. Does it have a touchscreen? No, it does not. You navigate the menus by spinning the blue rotary knob and pressing the knob in to select an item.

4. What is the green "Adapter-V1.0" board for? The smart adapter is designed to plug perfectly onto the AUX pins of a standard RAMPS 1.4 shield. It provides the exact layout needed for the two ribbon cables, preventing you from having to wire 20 individual jumper wires.

5. How do I know which ribbon cable goes where? The ports on the back of the LCD and the ports on the smart adapter are labeled "EXP1" and "EXP2". Simply connect EXP1 to EXP1, and EXP2 to EXP2.

6. I turned it on, but the screen is glowing blue and completely blank. Is it broken? Likely not! Look at the front of the LCD board for a small metal component with a screw slot labeled "VR1". That is the contrast potentiometer. Use a small screwdriver to turn it until the white text appears on the screen.

7. What does the "K1" button do? The square tactile button labeled K1 is a hardware Reset/Emergency Stop button. Pressing it instantly halts the Arduino and resets the printer.

8. Why is my printer screaming a continuous loud beep when I turn it on? You have plugged the ribbon cables in backward, or swapped EXP1 and EXP2. Turn the machine off immediately and flip the connectors around.

9. What is the round black component next to the knob? That is an active buzzer. It beeps when you click the menu knob, and it can be programmed by the slicer to beep when a print finishes or if there is a thermal runaway error.

10. How do I enable this screen in Marlin Firmware? In your Configuration.h file, find the line #define REPRAP_DISCOUNT_FULL_GRAPHIC_SMART_CONTROLLER and uncomment it (remove the two slashes // at the beginning of the line).

11. Do I need any special libraries in Arduino IDE to compile the firmware? Yes. If you are compiling Marlin for this 128x64 display, you must install the U8glib library in the Arduino IDE before verifying the code.

12. What size SD card does it take? The slot on the back of the LCD takes a standard, full-size SD card. If you have a MicroSD card, you will need a full-size SD adapter sleeve.

13. How should I format my SD card? 3D printer motherboards can only read cards formatted to FAT32. They will not read exFAT or NTFS formats.

14. When I turn the knob clockwise, the menu goes UP instead of DOWN. How do I fix this? This is a firmware preference. In Marlin's Configuration.h, locate the line #define REVERSE_ENCODER_DIRECTION and uncomment it to flip the scrolling behavior.

15. Will this work with 32-bit boards like an SKR V1.3 or V1.4? Yes, many modern 32-bit boards have EXP1 and EXP2 headers specifically designed to accommodate this exact screen without needing the green smart adapter.

16. Can I change the backlight color to red or green? No, the LEDs behind the screen are manufactured to only emit blue light.

17. How long are the included ribbon cables? The included pink/grey flat ribbon cables are typically 30cm (approx. 12 inches) long.

18. Can I use longer cables if I build a bigger printer enclosure? You can, but it is highly discouraged. SPI data signals degrade quickly over long distances. Cables longer than 50cm often result in screen corruption, glitching text, or failed SD card reads.

19. Does the kit include a case? No, this is a raw electronics kit. You will need to 3D print your own plastic enclosure for it! There are thousands of free case designs for this specific "RepRapDiscount" screen on Thingiverse and Printables.

20. Can I plug a USB cable into this screen? No, the screen does not have a USB port. The USB connection goes directly into your Arduino Mega 2560 board.