Month: November 2022
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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…
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Upload the Arduino Ohmmeter Sketch
It’s time to upload the Ohmmeter sketch to the Arduino. Example 13-1 reads the resistance of R2, and reports the result through the serial display. Here are the steps you’ll need to take: Once the Ohmmeter sketch has been uploaded to the Arduino, place the unknown resistor (shown as R2 on the Frizting diagram) you want to test…
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Let’s Build an Arduino Ohmmeter
This gadget tests the resistance of electrical components. Place the unknown resistor you want to test in series with the reference resistor R1 connected to GND. The Arduino will calculate the resistance and display it on the Serial Monitor. The resistance of other electrical objects can be measured with the Arduino Ohmmeter as well. Building the…