ACS712 Current Sensor Brick, AU $4.90 – Picture 0

ACS712 Current Sensor Brick, AU $4.90 – Picture 1

ACS712 Current Sensor Brick, AU $4.90 – Picture 2

Acs712 Current Sensor Brick

AU $4.90

Sydney, Australia
Jun 9th

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Overview Current sensor module based on the ACS712 sensor, which can accurately detects AC or DC signals. Up to 5A maximum AC or DC current can be detected via analog I/O port. DESCRIPTION What is an electronic brick? An electronic brick is an electronic module which can be assembled like Lego bricks simply by plugging in and pulling out. Compared to traditional universal boards and circuit modules assembled with various electronic components, electronic brick has standardized interfaces, plug and play, simplifying construction of prototype circuit on one’s own. There are many types of electronic bricks, and we provide more than twenty types with different functions including buttons, sensors, Bluetooth modules, etc, whose functions cover from sensor to motor drive, from Ethernet to wireless communication via Bluetooth, and so on. We will continue to add more types to meet the various needs of different projects. Electronic brick of current sensor is based on ACS712 sensor, which can accurately detect AC or DC signals. The maximum AC or DC that can be detected can reach 5A, and the present current signal can be read via analog I / O port. Features 1. Plug and play, easy to use. Compatible with the mainstream 2.54 interfaces and 4-Pin Grove interfaces in the market. 2. With use of M4 standard fixed holes, compatible with M4-standard kits such as Lego and Makeblock. 3. Terminals with screws for easy wiring and removing. Specifications PCB size 30.0mm X 24.0mm X 1.6mm Working voltage 5V Input current type AC or DC Compatible interfaces 2.54 3-pin interface and 4-pin Grove interface(1) Wiring interface Power terminal(2) Note 1: S for analog output port, V and G for voltage at the common collector and ground respectively Note 2: :"+" for current inflow port "-" for current outflow port Electrical characteristics Parameter Min. Typical Max. Unit Supply voltage 4.5 5 5.5 VDC Working current (VCC=5V) - 10 13 mA Output impedance RLOAD (VIOUT to GND) 4.7 - - KΩ Bandwidth(1) - 34 - Hz Input current range -5 - 5 A Sensitivity 180 185 190 mV/A Note 1: After removing C1, bandwidth can reach 80kHz Relationship between output voltage and induced current DEMO Connect S port of electronic brick of current sensor to A0 port of Arduino board, and we will use the following program to read the analog value and send it to the computer for display via serial port. #define CURRENT_SENSOR A0 // Analog input pin that sensor is attached to float amplitude_current; //amplitude current float effective_value; //effective current void setup() { Serial.begin(9600); pins_init(); } void loop() { int sensor_max; sensor_max = getMaxValue(); Serial.print("sensor_max = "); Serial.println(sensor_max); //the VCC on the Grove interface of the sensor is 5v amplitude_current=(float)(sensor_max-512)/1024*5/185*1000000; effective_value=amplitude_current/1.414; //minimum_current=1/1024*5/185*1000000/1.414=18.7(mA) //Only for sinusoidal alternating current Serial.println("The amplitude of the current is(in mA)"); Serial.println(amplitude_current,1);//Only one number after the decimal point Serial.println("The effective value of the current is(in mA)"); Serial.println(effective_value,1); } void pins_init() { pinMode(CURRENT_SENSOR, INPUT); } /*Function: Sample for 1000ms and get the maximum value from the S pin*/ int getMaxValue() { int sensorValue; //value read from the sensor int sensorMax = 0; uint32_t start_time = millis(); while((millis()-start_time) < 1000)//sample for 1000ms { sensorValue = analogRead(CURRENT_SENSOR); if (sensorValue > sensorMax) { /*record the maximum sensor value*/ sensorMax = sensorValue; } } return sensorMax; } Revision record Version Description Date Written by v1.0 Initial edition 17th, April, 2013 Stan Lee Specification Brick Type Sensor Brick Brick Interface 3PIN Brick Power Supply 5V Board Size 30 x 24 x 1.6mm LED Color No Weight 20.00g Model IM120710011 Download Schematic SCH_IM120710011 Datasheet DS_IM120710011 Demo Code DEMO_IM120710011

Condition:	New	Brand	IteadStudio
Model	IM120710011