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Version specific info
Panelolu | Panelolu2
Crystal Clear action run.png

Release status: working

Panelolu2 in case.jpg
RepRap electronics LCD sceen with Click Encoder and LED indicators
CAD Models
External Link


Purple Pink Panelolu.jpg

Panelolu2 is an LCD and rotary encoder, based on the original Panelolu. It uses an I2C port expander to drive the LCD screen and adds a piezo buzzer and indication LEDs. This version uses less pins, making it compatible with the Melzi electronics and even leaves enough spare pins to drive a couple more outputs (such as an additional extractor fan and stepper driver cooling fan)

Panelolu2 without case Sanguinololu.jpg

The Panelolu2 design simplifies the assembly by mounting all components on one circuit board that can be soldered directly to an LCD screen. The standard way to connect it to the screen is with a single row of 2.54mm headers as shown below. This row of headers could be replaced by wires (ribbon cable would be best) - enabling a variety of case designs. This simplification also extends to the wiring which is now a 2x6 IDC plug on both ends of a ribbon cable. The circuit uses a combination of through hole and surface mount components; the other side of the prototype circuit board is shown below. The brightness and contrast pots are now on the back of the board and can be adjusted through the rear of the case.

Panelolu2 circuit board bottom.JPG

Where to buy

Think3DPrint3d Webshop

eMakershop - Panelolu2 for RAMPS

eMakershop - Panelolu2 for Melzi

eMakershop - Panelolu2 for Sanguinololu2

eMakershop - Panelolu2 for Printrboard

Think3DPrint3D ebay store

Makemendel -Panelolu2 for PrintrBoard

Makemendel -Panelolu2 for RAMPS


The enclosure is on, as an OpenScad file and STL.

It is fully Open Hardware, all the files are available on Github

Instructions & Schematics

The instructions are on a number of blog posts by Tony from Think3dPrint3d.

todo: migrate them to this page


Panelolu2 Sanguinololu adapter.JPG

Think3DPrint3D Panelolu2 Blog Post.


Melzi on M90.JPG

[Panelolu2 For Melzi]

Printrboard and RAMPS

Printrboard adapter setup.jpg

Ramps adapter fitted.jpg

[Panelolu2 For RAMPS and Printrboard]