ESP32 Sleep Modes Testing. I am trying to connect an RFID RMD6300 to and ESP32 (TTG0 T8). 5. “`, yeah. Measuring current is simple. Graph below shows its non-linear curve. int ADC_VALUE = 0; Hello, could you provide wiring diagram and resistors/capacitors used to read positive and negative values? Copy this authentication code. But we can measure higher voltage else by using voltage step down methods like voltage divider method, step down transformer method in case of ac voltage measurement. hardly implies misunderstanding anything else Perhaps. Found inside – Page 179The communication with the ESP32 is established via the ADC port to convert the analog value of the sensor into a digital measured value using firmware. Specifications: • Humidity: 0–100% RH • Current consumption: 20 μA •. Micro USB connectors are about half the height of mini USB. Then we set the timer to 5000L for an update time of 5 seconds, Inside the loop fucntion we are running the timer and Blynk. Hi, Joe! The EnergyMonitor object emon is created &calibration factors are defined. You just need to store the output of this function in any variable other than character types. I used an MCP3208. Was wondering. Code for analog voltage measurement is shown below. I dont think its limited to 120v Just scale R4 accordingly, isn’t it ? Random example: Maxim’s MAXQ3180. Apart from the circuit part, the AC wires where the current and voltage needs to measured are connected to the input AC Terminal of Voltage Sensor. Add another couple of op-amps to scale up/down the voltage and current waveforms into their respective ADC input and, walla, record both real and reactive power! Like any other transformer, a current transformer has a primary winding, a magnetic core, and a secondary winding. Steve Kasuya has updated the project titled Automatic Ventilation System with CO2 Monitors. Computer Science. For quite some time, I have been trying to find out ways to build a simple yet accurate way to measure and monitor the power usages from anywhere, be it at home office or on the go.After some research, I decided to build a simple one by using a current sensor with NodeMCU and send the measured current values to the IoT Cloud Platform.This can be done with the help of the Adafruit MQTT IoT . So if you have more informations about how to do it in a safe way, let me know please. The issue here is that the ESP32 ADC inputs only go up to 3.3V and would give an incorrect maxed out reading for anything over about 6.4A: Take it easy. You will connect the SCT-013 sensor and the P8 sensor together with the ESP32 and measure the voltage and current as shown in the circuit: Monophasic mode by measuring the power of a lamp . Grebu liked A 10X 100MHz Differential Probe. Crack open any digital power meter that power companies are now using and you’ll find they now use a CT. CTs have also long been used in metering large power loads. In https://github.com/espressif/arduino-esp32/issues/102 a “fix” seems to allow using ADC2 while WiFi activated, but no explanation about the consequences on WiFi and why WiFi modifies ADC2 configuration… This fix seems to work for me, whereas switching WiFi off for reading ADC2 doesn’t. Other types of ACS712 has not good linearity, too. ADC inside esp8266 and esp32 not linearity and effect by vcc, temperature. It is a 12-bit ADC that is pretty inexpensive, and communicates with the ESP via SPI. My idea is to collect the voltage and current at the same time. The kit includes a cable adapted to Gravity DFRobot IO Expansion Shield. When the magnetic field is placed around it, the charge carriers, electrons, and holes are deflected to either side. Then drag & drop or add 4 widgets and assign the variable as per code and then email the authentication code. Nice and simple. CJMCU-758 Hall Effect Current SensorCode on GitLab: https://gitlab.com/MobiusHorizons/youtube-CJMCU-758-ads1115Datasheet for the ACS758LCB-050B-PFF-T (50A Bi. After that, we will see an example, where we connect a variable resistor with the analog channel and measure voltage and display it on the serial monitor of Arduino IDE. Connect the pin numbers 4, 6, 11, 12, 13, 14 of LCD to ESP32 D13, D12, D14, D27, D26, D25 pins. Chhavi specifications: SiP - ESP32-PICO-D4 system-in-package with ESP32 dual-core processor @ 240 MHz, 4 MB SPI flash. A bit of a mashup of different systems. Use a 10K Potentiometer at Pin 3 of LCD to adjust the LCD Contrast. ACS712 is a Hall Effect-Based Linear Current Sensor it can measure both DC (Direct Current) and AC (Alternating Current). The type of ADCs used in this development board is SAR-based which is also known as successive approximation registers. Created by Espressif Systems, ESP32 is a low-cost, low-power system on a chip (SoC) series with Wi-Fi & dual-mode Bluetooth capabilities! The ACS712 is a fully integrated, hall effect-based linear current sensor with 2.1kVRMS voltage isolation and a integrated low-resistance current conductor. Heck, it’s the standard way of measuring line currents in utility systems, all the way from gigawatt long-haul lines down to the newfangled smartmeter on the side of your house. You will get the authentication code in the mail. So your measurement is not that far off. //microcontrollerslab.com/esp32-pinout-use-gpio-pins/. voltage_value = (ADC_VALUE * 3.3 ) / (4095); This will be used in your code. I’ve a similar project on the way for a solar power / grid setup. Wiring. The first step to reducing the energy consumption of your home is figuring out how much you actually use in the first place. How can I get a software simulation for this, How can i do the node red instead blynk? This is a new, smaller connector for USB devices. Found inside – Page 81ESP32. Microcontrollers. Marek. Babiuch. and. Jiri. Postulka. Abstract This chapter deals with the implementation of ... The secondary task of the system is to collect data from sensors for monitoring the temperature of an object and ... Found inside – Page 1161This sensor is used to measure the amount of electrical current or conductance in the water solution. The higher the ions, ... ESP32. LoRa-Module. LoRa provides low power and longer channel capacity suitable for distributed sensors. Still they are the gold standard. Now, if you are familiar with how analogRead works on any Arduino board, like Arduino . After Adding the above libraries to the Arduino IDE, you can upload the IoT Electricity Energy Meter Code to ESP32 Board. (Comment Policy). I’m building one myself right now. I’m building a 12-channel power meter, using current transformers, in a DIN rail mountable enclosure. Using the SCT-013 Current Sensor & ZMPT101B Voltage Sensor, we can measure the all required parameters needed for Electricity Energy Meter. The ESP32 Hall Effect Sensor. So you will be directed to NextPCB website. Sensor matrix: 160 x 160 pixels. Found inside – Page 230And it also stores the sensor data in the SD card for transfer it to internet with the help of Arduino and ESP32 Module. ... This display shows the current sensor value and the patient's current condition. SCT-013 Current Sensor & ZMPT101B Voltage Sensor VCC is connected to Vin of ESP32 which is a 5V Supply. 3. ESP32 Deep Sleep Mode: Now after putting ESP32 in Deep Sleep mode, the current consumption is reduced significantly to 11mA. one terminal of the variable resistor is connected with ground and other terminal with 3.3 volt. 5. The SCT013 sensors are current transformers, instrumentation devices that provide a measurement . CT sensors aren’t really that accurate, but you still get a useful indication. ADC_VALUE is multiplied with a resolution of ESP32 ADC which is 3.3 / 4095. Found inside – Page 23As a result, the current device in use is a small, low-cost, lightweight and portable collection of sensors for monitoring ... LSM9DSO is a sensor measuring accelerometer and gyroscope data from human gestures and ESP32 is used for ... In this project, we will learn how to make our own IoT Based Electricity Energy Meter using ESP32 & monitor data on the Blynk Application. Then we gonna chech a simple code that doesn't . Microcontrollerslab.com All Rights Reserved, How to use Analog to digital converter channels of ESP32, Program for ESP32 Analog to digital converter, Code for analog voltage measurement using ESP32 ADC, Alternating current measurement using pic microcontroller, AC voltage measurement using pic microcontroller, AC power measurement using pic microcontroller, step to install ESP32 library in Arduino IDE, ESP32 GPIO pins with LED blinking example, //microcontrollerslab.com/adc-esp32-measuring-voltage-example/, https://github.com/espressif/arduino-esp32/issues/102, //microcontrollerslab.com/esp32-pinout-use-gpio-pins/, ESP32/ESP8266: Google Firebase Authentication (Email and Password), HC-SR04 Ultrasonic Sensor with ESP32 – Measure Distance, DHT11/DHT22 Web Server ESP8266 NodeMCU using Arduino IDE, HC-SR04 Ultrasonic Sensor Interfacing with Arduino – Distance Measurement Example, ESP32 DHT11 and DHT22 Web Server using Arduino IDE, ADC1_CH1 >>>Not available on this board Devkit DoIT ( 30 pins version ), ADC2_CH1 >>> This channel is not available on Devkit DOIT board. But ADC2 is shared between other resources of this development board. Acs712 current sensor interfacing with Arduino for ac and dc current measurement: In this tutorial you will learn how to interface acs712 hall effect current sensor with arduino?And How to measure dc current using asc712 hall effect sensor and how to measure ac current using acs712 hall effect sensor? If this is the first time you use ESP32, see how to setup environment for ESP32 on Arduino IDE. We can use these sensors with a processor, like Arduino, to measure the intensity or power consumed by a load. In these lines, first we give a name to ADC2_CH3 as Analog_channel_pin and after that, we initialized two integer variables to zero. …or you can buy an efergy with 1x3phase main meter and up to 4 sub meters one of them for power production like photovoltaic. Blynk is the most popular Internet of Things platform for connecting any hardware to the cloud, designing apps to control them, and managing your deployed products at scale. ESP32 analog channels are of 12 bit which means the minimum step of each voltage level is between 0 and 4095. Found inside – Page 295native programming environment of ESP32 is Espressif IoT Development Framework (esp-idf) [18], which is a command line based ... developers have also developed various libraries such as one for the temperature and humidity sensor DHT11. The readings are stored in a database, and [Xavier] uses GraphQL and Dygraphs to generate visualizations. Although some ESP32 boards have a power supply pin to connect to other devices, many times the maximum current drawn that those pins can supply is not specified. To convert its output voltage into Arduino-readable values, I'm using it with an AC Current signal conversion module. Computer Science questions and answers. Learn more, Building A Safe ESP32 Home Energy Monitor, build a very robust DIY energy monitoring system without having to modify your AC wiring, monitoring energy consumption can uncover some surprising trends, and don’t have an optically coupled electricity meter, http://beet.the-eye.eu/public/Books/Electronic%20Archive/BuildADigitalWattAndWatt-hourMeter.pdf, https://www.mousa-simple-projects.com/2017/12/power-factor-measurment-using-arduino_18.html, https://www.crowdsupply.com/circuitsetup/split-single-phase-energy-meter/, https://www.nts.com/services/certification/pge/han-devices/, Weird Al’s Monster Battlestation Is Now Just A Reasonably Fast PC, 30 Days Of Terror: The Logistics Of Launching The James Webb Space Telescope, Speaker ‘Stun Gun’ Aims To Combat China’s Dancing Grannies, VCF East 2021: Preserving Heathkit’s 8-Bit Computers, ETH0 Autumn 2021: Tiny Camp Manages COVID Precautions Indoors. IoT Based Smart Electricity Energy Meter using ESP32 & Blynk Application, © Copyright 2021, All Rights Reserved  | How To Electronics, IoT Based Electricity Energy Meter using ESP32 & Blynk, #include "EmonLib.h"   //https://github.com/openenergymonitor/EmonLib, // Voltage: input pin, calibration, phase_shift, IoT Based Patient Health Monitoring on ESP32 Web Server, Control LED on Inernet using Arduino & ENC28J60 Ethernet Module, IoT Web Controlled Smart Notice Board with ESP8266, Sending Sensor Data Wirelessly with LoRa SX1278 & Arduino, IoT Based Patient Health Monitoring using ESP8266 & Arduino, Interfacing MAX30100 Pulse Oximeter Sensor with Arduino, Password Based Door Lock Security System Using Arduino & Keypad, Interface Capacitive Soil Moisture Sensor v1.2 with Arduino, Temperature Based Fan Speed Control & Monitoring With Arduino, Measure Soil Nutrient using Arduino & Soil NPK Sensor, ECG Graph Monitoring with AD8232 ECG Sensor & Arduino, How to Collect & Export data from Bluetooth Devices, Create App & Transfer Data between PC & Phone using BleuIO, How to make Simple Bluetooth Low Energy Repeater, Plotting Real-Time Graph from Bluetooth 5.0 to Google Chrome, How to send BLE data to Google Firebase Cloud, Face Recognition Based Attendance System using ESP32 CAM, Interfacing MAX17043 LiPo Fuel Gauge IC with Arduino, Interfacing 0-25V DC Voltage Sensor with Arduino, SCT-013-030 Non-invasive AC Current Sensor. Luckily, as [Xavier Decuyper] explains, you can build a very robust DIY energy monitoring system without having to modify your AC wiring. If it shows some other value, then you need to modify the following calibration factor in the code. Not even how much. /* This code works with ACS712 current sensor, it permits to calculate the RMS of a sinewave Alternating Current * it uses the Peak to Peak method to calculate the RMS * For more information check www.surtrtech.com */ #define SAMPLES 300 //Number of samples you want to take everytime you loop #define ACS_Pin A0 //ACS712 data pin analong input . can i get the simulation file of this project. I am trying to connect my CT Clamp to my NodeMcu Amica using the CT Clamp ESPhome Integration. Found inside – Page 39To power the wearable, it is used the USB port available in the version of the ESP32 used to build the current prototype. The wearables are represented in Fig. 5, where the letters A, B and C identify the motion sensor, ... After I stumbled upon the attenuation attribute in the ADC sensor doc, I knew, why my sensor had always shown 1.10 V: 1.10 V is per default the maximum voltage, an ESP32 ADC sensor reports. Great source of knowledge is openenergymonitor.org which includes also Arduino library. Capacitors (10µF) €0,66. Found inside – Page 1039MQ-7 gas sensor is highly sensitive toward the natural gases. The calibrated sensor range is 10–10,000 ppm for detection. Table 2 ESP32 specification S. no. Specifications Values 1. Voltage on-board 3.3 V Current RF transmission 250 mA ... Δdocument.getElementById( "ak_js" ).setAttribute( "value", ( new Date() ).getTime() ); Copyright © 2013-2021 An energy meter is measuring with 20MS/s and up AND is measuring the voltage and can be bought from China for 20 bucks. Found inside – Page 369This implementation sends, based on the current OS, a different set of variables to be monitored in a different ... This network allows the ESP32 update via post requests, the information of additional sensors to the OVMS in JSON format ... It took a bit of tweaking to get it to work properly (the voltage divider resistors need to be fairly small, e.g. The circuit has been designed using Fritzing software. So, why not to build our own IoT Based Electricity Energy Meter? Schematics . Most of the components can be ordered online from Amazon. Can you please help me with the code? Learn how to wire the Current Sensor to ESP32 - DevKitC in a few simple steps. DESCRIPTION:ESP32 is already integrated with antenna and RF balun, power amplifier, low noise amplifiers, filters, and the power management m. AC Current Sensor SCT013 100A Non-Invasive Split Core SCT-013-100A. Center terminal of the variable resistor is connected with GPIO15 which is ADC2 channel three or ADC2_CH3. If you can’t use the right units for energy and power, you shouldn’t be writing educational articles on the internet. Pin mapping of ADC channels for both ADCs is shown below. After setting the attenuation to 11db, I could finally see about 1.75 V from the circuit with no current running through the clamp sensor and values up to 2 . Found inside – Page 124The target person will fix in the PAPR device; it transmits a unique code every 20s via an infrared sensor. ... The system's primary function is to determine the current position using multiple BLE-enabled modules located along with the ... Polikarpos September 13, 2016, 4:42pm #6. i am trying to measure AC with ACS712 30A + Nodemcu ESP8266 + Blynk. The only legitimate use for ‘amps per day’ is if it is in reference to Yngwie Malmsteen trying to break his Sandvik guitar. You need a two resistor of 10K & a single resistor of 100 ohms connected along with a 10uF Capacitor. The GND pin of both the modules is connected to the GND of ESP32. ESP32 is a series of low cost, low power system on a chip microcontrollers with integrated Wi-Fi and dual-mode Bluetooth. Just to be clear: these cheap CT sensors measure power as accurate as your thumb measures distance. I suspect it is more accurate but at the same time, and as he states, it takes a different set of magic values for 220 or higher operation and this simply measures current and assumes voltage so it should be able to move to different voltages with ease. 1. This sensor has an output voltage of Vcc x 0.5 = 2.5 at the input current 0A and a 5V Vcc power supply. In this tutorial, we will learn how how to use ADC (analog to digital converter) module of ESP32 development board with Arduino IDE. delay(1000); The ESP32 series employs a Tensilica Xtensa LX6 microprocessor in both dual-core and single-core variations and includes in-built antenna switches, RF balun, power amplifier, low-noise receive amplifier, filters, and power management modules. (adsbygoogle = window.adsbygoogle || []).push({}); The list of components required for making IoT Based Electricity Energy Meter are given below. In this ESP32 tutorial, we will check how to get temperature measurements on the Arduino core running on the ESP32, using a DHT22 temperature and humidity sensor. However, you can still do some signal conditioning outside the microcontroller board to accept different input ranges. 3. The PCB Board for the IoT Energy Meter is designed using EasyEDA online Circuit Schematics & PCB designing tool. Electronic hobbyist since 1976. I know I rarely put my Kill A Watt in the “price” mode, but use at both my place and friends places to see what the big loads are. The Blynk timer object is then created to handle the sending of data to the Blynk mobile app. Serial communication will be used to send data from ESP32 board to serial monitor of Arduino IDE. When the project is completed, I’d like to open-source it. Your tutorial about ESP32 ADC //microcontrollerslab.com/adc-esp32-measuring-voltage-example/ is really interesting, as well as other ESP32 articles, thanks. Active sensing area: 8 x 8 mm. Found inside – Page 1128The dashboard then displays the individual power consumption readings on each sensor and the total power ... The sensor unit is composed of three SCT-013-050 non-invasive split-core current sensors and an ESP32 microcontroller. https://iotawatt.com/. These little devices clamp over an AC wire and detect how much current is passing through it via induction. So to convert ADC_VALUE back into voltage we simply multiply it with resolution as we done in the first line. - GitHub - G6EJD/ESP32-DC-Voltage-Measurement: Using an ESP32 to measure a range of DC voltages using a voltage divider add-on. The Working Principle of the Hall Effect on ASC712. 23. I built a system using a CurrentCost EnviR, using three sensors, and a Raspberry pi to capture to power measurements. The “Sense” energy meter product does this. { All the functions used in this code have already explained in the previous tutorial and in this tutorial except serial.begin() and serial.println() functions. Double is even better. This current sensor module can also be easily interfaced with 3.3v compatible controller boards like ESP32 and Nodemcu ESP8266, etc. For example, if ADC_VALUE counts 10, its mean it has taken 10 steps or value at the input pin is 10 times the resolution of adc. The module is simple to use and comes with a multi-turn trim potentiometer for adjusting and calibrating the ADC output. So we have initialized the baud rate of 115200. The figure below shows the pins of analog channels on Devkit DOIT: Now, let’s see how to write code or program for reading ADC values of with any of these 15 channels available on this board. Both the buzzer and the PIR motion sensor can operate at 3.3 V, which facilitates the design of the circuit. benjjyman wrote a comment on My machinery 2021: Direct Granules Extruder. Look at the power feed of any large industrial warehouse and youll probably see all the phases running though a set of CTs and those are then wired down to a power meter, rather than running all that current though the power meter itself. Found inside – Page 421Additionally, the data provided by all the sensor networks of our station (current, voltage, power temperature, irradiance . ... required for the designed 'PVESP32' board is the cuttingedge 32 bits and dual-core microcontroller ESP32. So we are using Arduino IDE in these tutorials. void setup() I'm using the SCT-013-020 current probe (voltage output type), which can detect up to 20 amps of current. If you are using “Watts per hour” it in the place of “Watts” or “Watt-hours per hour”, then you are ignorant and have a fundamental misunderstanding of how electricity and the universe in general works: You are instantly identified as incompetent. We have similar guide with MicroPython here: Enter your email address to subscribe to this blog and receive notifications of new posts by email. See the result on Serial Monitor. Found inside – Page 54The output of an EMR is electrically isolated from its input and switches' high-voltage/ high-current load connected ... For example, I have the following EMR module that comes within an ELEGOO sensor kit: As we can see in Figure 2.17, ... Blynk is an application that runs over Android and IOS devices to control any IoT based application using Smartphones. ESP32 is one of the most popular Wi-Fi based microcontroller modules and it is a popular choice in many Portable IoT Applications.It is a powerful controller that supports Dual Core Programming and also has in-built Bluetooth Low Energy (BLE) support making it a good choice for portable applications like in iBeacon devices, GPS Trackers, etc.However, in Battery-powered applications like these . Micro…. Woodward has an Interesting circuit. Found inside – Page 5533.2.1 Hardware Development ESP32 NodeMCU ESP32 is a series of low-cost, low-power system on a chip (SoC) microcontrollers with ... It converts photo-current or voltage depends on the UV intensity by internal amplifier equipped in it. I’ve side-stepped the problem of actually sensing the line voltage by assuming that it is a perfect 230V sine wave, and detecting the phase with a zero-crossing detector (conveniently, it was already present in the design). Keep in mind that the asc712 works on 5V and the Esp32 on 3.3V. This is SCT-013 Non-Invasive AC Current Sensor Split Core Type Clamp Meter Sensor which can be used to measure AC current up to 100 amperes. Most naive attempts at implementing these things forget that the 120V or 230V line you’re clipping on is capacitively coupled to the coil on that core: If the electrostatic shield is not grounded (or not present) there’s a massive common-mode signal on the wire pair coming out of it that will swamp the differential signal that represents the line current. That is why most of the people trust NextPCB for PCB & PCBA Services. Once the installation is completed, open the app & sign-up using your Email id and Password. Drag and drop these components onto the canvas, and instantly get a list of secondary parts, wiring instructions and a test code for your circuit. The features of ACS712 include: 80kHz . This allows me to measure the current on the 4-quadrants :). Operating temperature : 40ºC ~ + 70ºC https://openenergymonitor.org/. So the project today is how to measure AC voltage up to 250V, in both 50Hz and 60Hz, using the ZMPT101B, that's the name of the transformer only, but you'll find it around with this name or "AC voltage sensor". Brilliant! ), Nice link thanks. 2. €22,93. So download and install the Blynk Application from Google Play Store. The ESP32 runs with a supply voltage of 3.3V. With the speed of the ESP32 i can see the sine wav form on the voltage and current (for voltage I'm using a transformer, for current I'm using a CT). etc.) Take a look at this: https://www.crowdsupply.com/circuitsetup/split-single-phase-energy-meter/, IoTaWatt is an open source 14 channel ESP based true power energy monitor that I like. Features - Automatic finger detection, one-to . Then you must do a voltage divider. 1. My new project consists of HW with cost under 20€. You can find information on UART pins of ESP32 on this link: Just have your energy supplier fit a smart meter, does all the work for you and the free monitor shows you usage every second. Current loops are ideal for data transmission because of their inherent insensitivity to electrical noise. Furthermore, We will learn to measure analog voltage with ESP32 ADC channels. Then we define the SSID & Password on our local wifi network & insert the authentication code from the Blynk. Input Current: 0-30A AC If the voltage is 3.3 volt at the input, the digital value will be 4095. Learn how your comment data is processed. Similarly, the best voltage sensor is the AC Voltage Sensor Module ZMPT101B. The ESP code an provide a max / min value (at the max voltage what was the current). It only measures the first harmonic, but unless you’ve got non-linear loads, like switching power supplies, it would give reasonable measurements after calibration for offsets and lag in each channel. Found inside – Page 563ESP32 accompanies Wi-Fi and double mode Bluetooth capacities. ... power the board modules, contact touchy pins, worked in corridor impact sensor and temperature sensor, ESP32 has been designed for cell phones, wearable hardware, ... Bachelor Thesis from the year 2017 in the subject Computer Science - Software, grade: 1,0, University of Applied Sciences Technikum Vienna (Elektronik), language: English, abstract: This thesis describes the realisation of a wireless light ... # Example configuration entry sensor: - platform: ct_clamp sensor: adc_sensor name: "Measured Current" update_interval: 60s # Example source sensor - platform: adc pin: A0 id: adc_sensor I am having limited success and non-linear readings. The ESP32 board features a built-in hall effect sensor located behind the metal lid of the ESP32 chip as shown in the following figure. The INA219 is a current and voltage sensor that you use with any Arduino, ESP8266 or ESP32 microcontroller. The purpose of our current monitoring system is to allow a user to insert any type of wire through the sensor and in return get a live current reading. Could this apply at 3 phase distribution board? Do you know the number of windings in the clamps? There is no need to connect the LCD as we will be monitoring the ESP32/SCT-013 ZMPT101B/ Energy Meter Data on Blynk Application. Found inside – Page 47Developing with ESP32, Arduino, C/C++, HTML, CSS, and JavaScript by Examples Erwin Ouyang. Some of these sensors use digital interface, such as 1-wire, I2C, SPI, etc. In this case, you don't need to use ADC. The ACS712 Current Sensor is a product of Allegro MicroSystems that can be used for precise measurement of both AC and DC currents.
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