from where we can select digital voltmeter in proteus 8

The circuit for this experiment is the same as Experiment #1. This will allow us to measure voltages up to 50 V. in this experiment, we will use a 10 kohm, along with a 90.9 kohm resistor, to create a 10:1 divider. Then the voltage actually input to the Arduino is 5 V or less. In order to measure voltages higher than the 5 V reference voltage, you need to divide the input voltage. Lcd.begin(16, 2) //// set up the LCD's number of columns and rows: Serial.begin(9600) // opens serial port, sets data rate to 9600 bps The following photo shows a typical display. Once the voltage has been calculated, the value is written to the LCD. Afterward, it then divides by 1024 to calculate the actual voltage value. The reference voltage is 5 V, so it multiples that value by 5. Using the analog input, the loop reads the analog value. This library houses each of the functions needed to write to the LCD.

The program below uses the LiquidCrystal library. The table below shows the pin connections: The backlight LED connects to 5V and ground. Enable connects to pin 9 of the Arduino, and RS connects to pin 8 of the Arduino. Four data pins DB4-DB7 are connected to Arduino pins 4-7. Rotating this pot changes the LCD’s brightness. Notice the potentiometer is connected to the 5V source and GND and the middle terminal is connected to pin 3 of LCD. Refer to the diagram below to see how to the Arduino with the LCD. The remaining two pins (15 and 16) help power the backlight. As seen in the table below, eight of the pins are data lines (pins 7-14), two are for ground and power (pins 1 and 16), three control the operation of the LCD (pins 4-6), and one adjusts the LCD screen brightness (pin 3). The 16x2 LCD in this experiment has a sum of 16 pins. In this experiment, we will make digital voltmeter that measures up to 5V using a 16x2 LCD and an Arduino board. This project will also help you measure voltages above the reference voltage using a voltage divider. LCDs are often used to display data from devices such as calculators, microwave ovens, and multiple other electrical appliances. To display the measured voltage, we use a liquid crystal display (LCD) with two lines of 16 characters. If you know the reference voltage-in this case we will use 5 V-you can easily calculate the voltage present at the analog input. We will obtain this value using the analogRead() function. The Arduino ADC is a ten-bit converter, and the output value ranges from 0 to 1023.

Inside the Arduino, there are multiple analog input pins connecting to an analog-to-digital converter (ADC). Using an Arduino to measure voltages is relatively simple. All that’s needed is an Arduino and a 16x2 liquid crystal display (LCD).

From where we can select digital voltmeter in proteus 8