Category: Arduino Projects
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Upload the Logic Tester Sketch
With the Logic Tester built, it’s time to upload the sketch. As shown in Example 15-1, the sketch operates an RGB LED using a pushbutton switch and two fixed resistors. Here are the steps you’ll need to follow: Once the Logic Tester sketch has been uploaded to the Arduino microcontroller, the RGB’s red LED will be on,…
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Let’s Build a Logic Tester
The Logic Tester is an easy-to-build Arduino microcontroller device. The RGB has three individual color LEDs that allow binary data to be seen visually. The RGB LED pinout is shown in Figure 15-2. Only the red and green LEDs will be used to show the binary logic values of “0” and “1”. To ensure proper operation of the…
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Introduction
The NOT, AND, and OR projects use two basic voltages: either +5VDC for TRUE or 0V for FALSE. These two signals let the Arduino make basic logic decisions. In the computer world, these voltages are known as binary data. In computers, binary data is represented by logic “1” (+5 volts DC) and logic “0” (0 volts).…
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Circuit Theory
Example 14-1 displays a variety of characters, letters, and numbers based on C language programming instructions. The sketch is programmed to test all segments of the LCD as it cycles through the Arduino program. The Arduino sketch uses digital data pins D2, D3, D4, D5, D11, and D12 of its microcontroller chip to send text message information to…
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Upload the LCD News Reader Sketch
It’s time to upload the sketch for the LCD News Reader to the Arduino. Here are the steps you’ll need to follow: Once the LCD News Reader sketch has been uploaded to the Arduino, the LCD will display a message, as shown in Figure 14-1. According to computing tradition, the first message you should display on a…
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Let’s Build the LCD
The first task in building the LCD News Reader is to solder a 16-pin male header to the LCD. The header needs to be cut to a length to match the 16 LCD copper pad holes. Figure 14-2 shows the male header cut to the appropriate LCD length. Insert the 16-pin male header through the copper pad holes and…
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Introduction
Have you ever wondered what cool projects you can build with an LCD (liquid crystal display)? So, The Arduino has communicated with us via sound, via blinking LEDs, and via the Serial Monitor. What would it be like if the Arduino could communicate through a self-contained screen that could display two lines of text at a…
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Circuit Theory
The operation of the Arduino Ohmmeter is based around the concept of the voltage divider. Two resistors are connected in series, and the reading is taken from where the two resistors join. The voltage measured at that point is the ratio of R2/(R1+R2) multiplied by the voltage in. For example, if R2 is 10K and R1 is…