1617481080

# Measure DC Voltage and Current with Arduino

This is the first of two videos on measuring voltage and current with an Arduino. In this video, we will be working with Direct Current.

There are many reasons why you might want to measure voltage and current using a microcontroller. You might want to measure the current consumption of your project, test the output of a solar cell or monitor the charging and discharging of a LiPo battery.

Voltage and current measurement are fundamental techniques, and so I’ve decided to do a couple of videos about the subject. In this first one, we will work with DC or Direct Current. And, obviously, we’ll be looking at AC in a future video and article.

Although I use an Arduino Uno in these experiments the principle of operation applies to pretty well any microcontroller.

We’ll start with DC voltage measurements, using the Arduino’s analog to digital converter, or ADC. We’ll see how we can employ a voltage divider to increase the range of measurement, and how a precision external voltage reference can be used to improve accuracy.

Then we’ll move on to current, using both a Hall Effect and resistive sensor. That last sensor is pretty unique as it can measure both current and voltage at the same time, and it uses an I2C connection instead of the Arduino’s ADC.

Here is what you’ll find in today’s video:

00:00​ - Introduction
01:54​ - DC Voltage Measurement Principles
05:35​ - Basic DC Voltage Experiment
11:07​ - Using an External Voltage Reference
14:49​ - DC Current Measurement Principles
16:54​ - Using the ACS712 Hall Effect Sensor
27:36​ - Using the Adafruit INA219 Sensor

#arduino

1617481080

## Measure DC Voltage and Current with Arduino

This is the first of two videos on measuring voltage and current with an Arduino. In this video, we will be working with Direct Current.

There are many reasons why you might want to measure voltage and current using a microcontroller. You might want to measure the current consumption of your project, test the output of a solar cell or monitor the charging and discharging of a LiPo battery.

Voltage and current measurement are fundamental techniques, and so I’ve decided to do a couple of videos about the subject. In this first one, we will work with DC or Direct Current. And, obviously, we’ll be looking at AC in a future video and article.

Although I use an Arduino Uno in these experiments the principle of operation applies to pretty well any microcontroller.

We’ll start with DC voltage measurements, using the Arduino’s analog to digital converter, or ADC. We’ll see how we can employ a voltage divider to increase the range of measurement, and how a precision external voltage reference can be used to improve accuracy.

Then we’ll move on to current, using both a Hall Effect and resistive sensor. That last sensor is pretty unique as it can measure both current and voltage at the same time, and it uses an I2C connection instead of the Arduino’s ADC.

Here is what you’ll find in today’s video:

00:00​ - Introduction
01:54​ - DC Voltage Measurement Principles
05:35​ - Basic DC Voltage Experiment
11:07​ - Using an External Voltage Reference
14:49​ - DC Current Measurement Principles
16:54​ - Using the ACS712 Hall Effect Sensor
27:36​ - Using the Adafruit INA219 Sensor

#arduino

1627019580

## How to Get Current URL in Laravel

In this small post we will see how to get current url in laravel, if you want to get current page url in laravel then we can use many method such type current(), full(), request(), url().

Here i will give you all example to get current page url in laravel, in this example i have used helper and function as well as so let’s start example of how to get current url id in laravel.

### Read More : Laravel Signature Pad Example

#how to get current url in laravel #laravel get current url #get current page url in laravel #find current url in laravel #get full url in laravel #how to get current url id in laravel

1621231140

## Abstract:

The purpose of the study was to design a flight control system with no pre-determined mathematical model, but instead using a genetic algorithm to maintain the optimal altitude. The study is done through a quantitative empirical research method. In the process of conducting the research, we found that programming a genetic algorithm was cumbersome for novice users to implement. Due to this, we created and released an open-source Python package called EasyGA.

An initial population of 15 chromosomes, 10 genes per chromosome with 100 generations, were used during one trial. The throttle value of the device had an associated gene value of 1 second. A minimum of 30 trials per robot were used to show statistical significance in the study. When the trials were completed, machine learning was achieved. Results showed that optimizing a one degree of freedom(DOF) device, in real-time, is possible without using a pre-determined mathematical model.

## How it works:

In order to run the genetic algorithms needed for this experiment to be successful, an Arduino Uno, Python, Electronic Ducked Fan(EDF), Electric Speed Controller(ESC), an ultrasonic ranging module (USRM, and a laptop are required.

**Ardunio Uno: **Is an open-source micro controller board. This micro controller board comes with digital and analog pins. The pins have different purposes. Some pins are used for sending 3.3V and 5V power to other devices, and other pins are used as input, and output pins, which send pulse width modulation (PWM) signals to other devices.

Evolving Altitude Robot Wiring Diagram. Image by Author

For this experiment, digital pins 9, 10, and 11 will be used to send PWM signals and receive sensory information from the ultrasonic range module. Digital pin 9 (TRIG) is used for the signal output, pin 10 (ECHO) is used for the signal input, and pin 11 is used for PWM signals to the ESC.

**Arduino C++: **The code written on the Arduino is to receive directions from the python script in the form of throttle values. The Arduino then executes those instructions while also reading the heights from the USRM and transmits them back to python using serial communication.

**Python: **Python was used as the main language to handle the genetic algorithm while also sending directions to the Arduino.

**SQL Database: **A Sqlite3 database is used to store all running and configuration data coming from the robot and genetic algorithm. It is also used to find trends and query data.

One DOF device: The device is made up of an EDF fan, the USRM, a carbon fiber tube, assorted wiring, and three 3D printed parts: the intermediary connector, and platform. The platform for the device is designed to work functionally with all parts and pieces needed for the EDF to run. The EDF required that the 120mm x 20mm carbon fiber tube connect directly to the fan.

#arduino #python #ai #python #c++ #arduino.

1594224060

## New IoT Dashboard Widgets

If you’ve been following the development of the Arduino IoT Cloud closely, you have probably noticed that over the months the Dashboard features have been progressing by leaps and bounds.

Sure, behind the scenes there’s work being done every day, but our users need and want features that better help them manage their connected devices.

As Arduino moves towards a more cohesive UX and UI, we recently released a set of new widgets for our enhanced, aggregated Dashboard which allows users to pick from multiple IoT things and build beautiful control panels with lots of flexibility.

Here’s a quick summary video highlighting these new features and widgets.

#arduino #featured #iot cloud #arduino dashboard #arduino widgets #iot

1616127982

## Lufkin Diameter Tape Measure

Lufkin Metric Tape Measure for construction and engineering, with Your Corporate LOGO! We have a variety of pipe diameter tapes, construction tapes, and architect tapes. Shop Now.

#diameter tape measure #pipe diameter tape measure #diameter tape #lufkin metric tape measure