Short Test of 9 Nozzle Printer Controller

A short test of the controller of my 9 Nozzle Inkjet Printer. The controller is an Arduino Mega 2560 + Ramps 1.4 with Marlin Firmware which sends data over I2C to an Arduino UNO which drives the LEDs. https://hackaday.io/project/167446-diy-inkjet-printer