Matrix Orbital DD-DB1 LCD/VFD Dev Board - Manual (Page 13)

Screen
The DevDevil provides a twenty character column alphanumeric display that is either two or four rows high. Both of these
popular screens are available in an array of colours on a variety of Production modules listed in the appendix below. The
initial power up message, contrast, and brightness settings are customizable.
Serial DB9 Connector
Mating Cables CSS1FT, CSS4FT
The serial protocol is most easily accessed using DB9 serial header onboard. This connection provides receive, transmit,
and ground pins with an option to supply power to the entire board as well. Using a custom cable with power supplied to
pin 9, either 5V or 9-15V can be supplied to the board once the ‘D’ jump is soldered. It is also important to set the
appropriate pins on the Voltage Select jumper and ensure the Power Select jumper is set to input.
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Illustration 7: Screen Location and Power Indicator
Illustration 8: Serial DB9 Connector, Power Option, and Indicators