What is PCF8574-Nx
PCF8574-Nx is a kit to interface 8-bit digital IO chip to NXT. It contains
all the basic parts needed along with general-purpose prototyping area on
the PCB. This kit can be used to design any custom sensor or IO device with
NXT. Following sections provide basic assembly instructions for this Kit.
PCF8574-Nx Feature List
•
Uses NXT compatible I2C protocol for communications.
•
All needed basic components included.
•
Position for second NXT compatible socket that lets you connect the
multiple boards to same sensor port.
Connections
Can be connected to any four ports of NXT
by using standard NXT cables.
Tools you will need
All the electronic components needed for assembly are included. To
assemble these components, you will need a soldering iron, solder, pliers, and
wire cutter to cut the resistor and capacitor wires.
Assembly
Connect all the components as
shown on the PCB silkscreen. You
can connect NXT style socket
either to J1 or J2. You can use
the second jack to daisy chain the
boards. That way, you can connect
more than one sensor to single
NXT port. If you plan to do that,
ensure to use resistors R1 and R2
only on one board.
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PCF8574-Nx V1.1User Guide
