Building Arduino PLCs by Pradeeka Seneviratne

Author:Pradeeka Seneviratne
Language: eng
Format: epub, pdf
Publisher: Apress, Berkeley, CA

The ArduiBox, Standard Version does include components (Figure 5-2) for building the on-board power supply and voltage regulator circuit.

Figure 5-2.Components for the power supply and voltage regulator . Image courtesy of Hartmut Wendt ( www.hwhardsoft.de )

Now let’s begin to construct an ArduiBox-based PLC step-by-step.

Soldering the Terminal Blocks

The prototyping plate (main board) is an unassembled PCB that can be used as a baseboard to construct the ArduiBox and provides mounting capabilities for other accessories as well. The prototyping plate is identical on the basic and standard versions of the ArduiBox.

The terminal blocks can be soldered to the prototyping plate and you can connect any external peripherals to the Arduino UNO through the terminal blocks. You can internally connect these terminal blocks to the Arduino pins to make them digital, analog, UART, or I2C ports. You’ll learn how to connect Arduino pins with terminal blocks in the section entitled, “Mapping Arduino Pins to the Terminal Blocks,” later in this chapter.

You need two 3-pin terminal blocks and four 2 pin terminal blocks (Figure 5-3) to build the external interface for connecting user-provided sensors and actuators.

Figure 5-3.3-pin and 2-pin terminal blocks . Image courtesy of Hartmut Wendt ( www.hwhardsoft.de )

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