Ncr4X20Vfd allows you to control the NCR 7454 / Futaba M204SD01B VFD (vacuum fluorescent display) module.
This example contains a number of tests intended to validate all Ncr4X20Vfd functionality. The test is driven via the Arduino serial monitor.
Follow the wiring information on the main Ncr4X20Vfd library page.
Load and run the sketch located at Ncr4X20Vfd/examples/UnitTests. Open the Arduino serial monitor and ensure it is set to 9600 baud. Follow the on-screen prompts displayed in the serial monitor window.