The acs712 current sensor with an arduino henrys bench. In this arduino ammeter, we will explain about measuring of current by using ohms law. Current monitoring of your ac power loads is now possible using crossplatform i2c communications, making current monitoring possible for your raspberry pi, beaglebone, arduino, or any other computing platform that supports i2c. For protection of control board arduino board, a variable resistor is used i. The sketch is the software that runs on the arduino. Since writing up the article on how to build a simple arduino home energy meter which measured the energy consumption for a single phase, ive had a number of people ask about doing a 3 phase energy meter. The arduino code is a modified version of the sketch from the arduino lcd voltmeter project. It also informs that how many mah charging current mobile phones take when connected with usb cable or chargers acwireless. Specs the power source will be ac stepped down and rectified to 50v dc. In other words, its nothing more than a simple arduino voltmeter that. The arduino can be damaged by greater than 5v or by negative voltage.
For measuring current, you pass the current through a small value resistor to generate a small voltage, then using ohms law. Voltmeter and ammeter can be easily made using pic microcontroller having adc analog to digital converter. Yeeco digital ac voltmeter ammeter ac 80300v 100a amp. The arduino voltmeter circuit we will build is shown below. As you may well know, arduino s analog inputs can be used to measure dc voltage between 0 and 5v when using. Features of three phase ac voltage measurement using arduino. It is a simple digital voltmeter, which can safely measure input dc voltages in 0 to 30v range. Arduino ammeter how to measure dc current using arduino. Variable power supply, constant current, amp meter, arduino compatible duration. This board contains an esp12 module, and an atmel 90e24 energy monitor chip. Arduino has the ability to measure current using analog input pin. Arduino ammeter circuit learning about electronics.
Acs712 ac current measurement shows how to measure ac current with an arduino. If you stacked up a lcd display shield, analog pin a0 is automatically occupied by the button function. In this post we are going to construct a digital ammeter using 16 x 2 lcd display and arduino. Four channel arduino lcd voltmeter starting electronics. In this section, the improvement and extension from 12 on hardware and software design of proposed power factor meter will be presented, including power factor improvement using capacitor banks. Ac voltage measurement can be carried out by converting ac voltage into proportional dc voltage using rectifier and filter circuits. An ac rms ampere flowing through a resistance produces the same amount of heat as a dc ampere, so this becomes the basis for defining an rms volt. If you cant find a voltmeter at home or anywhere else, then this hack is for you. Read the information from the lcd voltmeter project for an explanation on how the code works. Analog current meter module ac 05a ammeter sensor board for arduino description. Interfacing acs712 current sensor with arduino youtube.
The arduino adc is a tenbit converter, meaning that the output value will range from 0 to 1023. The analog voltmeter vi is a modified version of the tutorials provided by labview makerhub. It is costeffective, miniature, flexible, and is useful for voltage stabilizer, machines and other devices for measuring voltage and current, and so on. For low ac voltage mili volts measurement precision rectifier is used as diode knee voltage is 0. While there is a range of commercially available single phase energy meters available, the 3 phase meters arent nearly as common and tend to be quite. When connecting the analog volt panel meter to the arduino, we connect one terminal. Most ad converters should be able to measure this voltage without amplification. The circuit connections are pretty straightforward and basic. You can optionally stuff an esp8266 or an 8 pin connector for use with an avr arduino board or other microprocessor which has 3 free gpio pins. Similar to dc voltage measurement voltage divider is constructed using 47k ohm variable resistor r1. The proposed digital ammeter can measure current ranging from 0 to 2 ampere absolute maximum with reasonable accuracy. For arduino uno, there are 6 analog input pins a0a5 where you need separate pin for each measurement. Ac 05a analog current meter module ammeter sensor board.
Module tutorial, signal visualisation and a simple code to measure not only sinewave signals but all types, like trms ammeter. China ac dc digital meter manufacturer, ammeter current. Measure any ac current with acs712 arduino project hub. Combined with a voltage sensor and phase measurement it gives accurate power readings even for nonresistive loads like motors. Simplified arduino ac current measurement using acs712 hall effect. Arduino wattmeter voltage, current and power measurement. The analog input pins will map input voltages between 0. Taiwan technology bp670 6070 ac2005a ac ampere meter 1. Simulating ac 285 rms voltage using ac arduino voltmeter. This electricity sensor is based on ta12100 current transformer, which can transform ac signals of large current into small amplitude signals. Multimeters and voltmeters are essential pieces of equipment when working on any kind of electronics circuit or arduino project.
But we only accept your ebay address,please make sure its 100% right. The arduino board can be powered from a standard 9v battery pack, as usual. How to measure current using arduino and acs712 current sensor. Now i am going to interface the arduino acs712 current sensor with arduino uno. Complete arduinovoltmeter code is given at the end of this project and it is well explained through the comments. The main reason behind making this is from my personal experience, when i was performing one experiment in the lab, i could not find a voltmeter so i made this hack to fulfill my requirement and also i think it will help others too. The only difference between the two projects is that the software voltmeter sends the voltages as a string on the usb port instead of displaying the voltages. The components to build the analog voltmeter consist of a littlebits slide dimmer control circuit, an arduino uno, and the labview analog voltmeter vi. In a future implementation, as an extension to this project, i will design a new circuit based on voltage and current sensors for more accurate results.
The voltage calculations work the same way as the original sketch, but now do the calculations for four channels. Dd7041 series digital ampere meter is an intelligent meter used to measure ac ammeter. Make a digital voltmeter using an arduino projects. We will obtain this value by using the analogread function. We are a professional manufacturer of ac and dc digital panel meter. Interfacing acs712 current sensor with arduino measure current. Arduino nano has 8 pins while arduino mega has 16 input pins.
The meter will enable us to measure energy units consumed by 3 phase loads. It works perfectly connected to a simple signal conditioning circuit that goes into an analog input on the arduino. Analog current meter module ac 05a ammeter sensor board for arduino. Its a current transformer with builtin electronics that give you 05v dc output for 010a ac. The arduino has several analog input pins that connect to an analogtodigital converter adc inside the arduino.
It is not just wattmeter, it is a 3 channel power switch with meter function per each channel. If you want to connect it with other terminal device such as plc,scm and so on, please prepare the fitable cable and write the program by yourself. The lcd has 16 pins the first two pins vss,vdd and last two pins anode, cathode are connected to the gnd and 5v. The arduino converts the raw data from its analog input into human readable values, then sends them to the serial port monitor. The sketch is based on the code from the measuring dc voltage using arduino article the sum and voltage variables have been changed into arrays so that they can store values from four analog channels.
You can use a voltage divider to knock down the voltage, and a diode or fullwave rectifier to take care of the negative voltage. With a voltage divider with r1 30k ohm and r2 10k ohm, a 12v battery would calculate as follows. Because the arduino has a 10bit adc, it outputs 01023 1024 steps for a 05v input. Digital display ac ampere meter 050a ac ammeter powered. Scale plate with special requirements are available upon request. The acs758kcb150u is a hall effect current sensor rated for 150a. Monitor current and keep track of your power consumption using your favorite computing platf. On dc meters these markings refer to positive and negative. The output module of the watt meter is a 5 volt 20 x 4 lcd, based on the hd44780. It also a good idea to add some protection diodes with any voltmeter. Here is a useful circuit for arduino lovers and experimenters. Simplified arduino ac current measurement using acs712 hall. Simulation is performed for various voltages between 220 r. The block diagram for the analog voltmeter project is shown next.
The lcd is connect with the digital pins 7,8,9,10,11,12. A voltmeter measures the voltage between two points in a circuit and, with digital electronics, this is an analog range from zero to the level of the power supply vcc. This video shows how to interface the acs712 current sensor with arduino, which shows the following. Its relatively simple to use an arduino to measure voltages. The meter is a perfect addition to any power supply, battery chargers and other electronic projects where voltage and current must be monitored. Pc front and bakelite case, four stud mounting, scale plate. Arduino ac voltmeter project with code and circuit diagram. In the arduino dc ammeter circuit, the analog input a0 and gnd are connected across the two terminals of the shunt resistor r. Functionally it will not matter to which terminal the coil wires are connected. Arduino voltmeter circuit learning about electronics. Arduino based current meter with i2c lcd screen youtube.
I am using pic16f877a and the result is displayed on an lcd display. Also, the same meter can connect or disconnect the 3 phase load remotely. Pzem004t update version ac single phase multifunction ampere meter watt power volt amp kwh ttl modbus with split ct for arduino we provide the software to connect it with the pc. Diy byo do it yourself ac dc hall effect current sensor transducer assemble this current monitor diy kit within an hour using soldering iron and volt meter and 12 volt power supply. In this sample project, ill show you just how easy it is to connect up, program and. The normal scale plate is made of alloyaluminium material white printed with black scales,values, units, technique symbols, etc. The two meters will need have a minimum of 12 bit resolution 16. Arduino mega is programed to interpret the digital wave forms then calculate and output power, voltage, current and phase of the active ac circuit. When you will put on charge your phone ampere charger current will inform you that how much mah charging current is being received and battery information. Diy ac energy meter with arduino a blog about diy solar. This project is about the simple hack of voltmeter by arduino.
Pzem004t update version ac single phase multifunction. Still, now i am receiving emails and messages from people with questions regarding hardware and software modification for monitoring ac power consumption. For arduino uno, there are 6 analog input pins a0a5 where you can use one of the pins to measure dc current. Software voltmeter using arduino starting electronics.
In this article, we are going to discuss that how to design a 3 phase smart energy meter using arduino. We will understand the methodology of measuring current using a shunt resistor and implement a design based on arduino. For measuring current, you pass the current through a small value resistor to generate a small. This circuit, then, essentially function as an ammeter, which is a device that measures current. It will be quite interesting as well as a good application. A simple arduino wattmeter is designed in this project with the aim of measuring power consumed by small loads up to 12w. Maybe you can use a software autoscale when displays increase current the arduino can. Yeeco digital ac voltmeter ammeter ac 80300v 100a amp volt panel meter voltage current amp monitor 110v 220v lcd dual display volt ampere power monitor measuring current tester two wires with ct. Pdf development of power factor meter using arduino. Diy byo do it yourself ac dc hall effect current sensor. The area of the factory is 700 square meter, we have two professional assembly line, 12 workers, 2 engineers, 2 sales men. And its selfpowered, so you dont have to worry about that either.
The board can be powered from any floating voltage source from 5v to 12v. Here in these formula val is the value that is read by arduino as analog input, which is further multiplied by the voltage that is been supplied by arduino and thus to get the vout. I purchased this as part of a project to build an ac power meter with an arduino. The acs712 current sensor is a product of allegro microsystems that can be used for precise measurement of both ac and dc currents.