In this chapter we introduce embedded circuits and programming operations. We start with simple input and output devices that are controlled by one of the most basic PICs of the mid-range family (the 16F84A). Although using a PIC to control an LED or to read a switch is as elementary as it gets, these operations are by no means trivial to the beginner because they require building a working circuit and developing and installing the corresponding PIC program. Later in the chapter we progress to more complex input/output devices, including the Seven-Segment LED display and circuits with multiple switches. One of the circuits uses a bank of multiple LEDs to function as a binary output ...
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