Matrix Orbital DD-DB1 LCD/VFD Dev Board - Manual (Page 15)

AC Power Input
Mating Cables ACPC
In addition to the methods mentioned above, the DevDevil can be powered with an AC to DC adapter. The output voltage
of any device must be between 9 and 15 volts DC and the barrel used must be center positive. For this configuration, the
Voltage Select jumper must be placed on the 9-15V Input side and the Power Select jumper set to input. This input can be
useful when communicating to the device via a computer serial port.
Protocol Select
To change the communication protocol used on the DevDevil, easy to use switches are provided. Three switches are
required for both RS232 and USB protocols, while only two are needed for TTL or I2C communication. To make a
selection, push all the switches in the desired block up, toward the centre of the board while pulling all others down.
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Illustration 11: AC Power Jack and Input Select
Illustration 12: Protocol Select Switches