Pololu Current Sensor 3.3 ~ 5.5V (logic) .045V/A output ACS711EX -31 ~ +31A @ <100V in with coin
Pololu Current Sensor 3.3 ~ 5.5V (logic) .045V/A output ACS711EX -31 ~ +31A @ <100V in hand backsidePololu Current Sensor 3.3 ~ 5.5V (logic) .045V/A output ACS711EX -31 ~ +31A @ <100V in handPololu Current Sensor 3.3 ~ 5.5V (logic) .045V/A output ACS711EX -31 ~ +31A @ <100V in mainPololu Current Sensor 3.3 ~ 5.5V (logic) .045V/A output ACS711EX -31 ~ +31A @ <100V in in bag

Pololu Current Sensor 3.3 ~ 5.5V (vcc) .045V/A out ACS711EX -31~+31A @ <100V in

$4.95

The ACS711EX Current Sensor chip and this board respectively are extremely robust current sensors. This board is designed to read currents between -31 amperes and +31 amperes at as high as 100 volts. This is an excellent, and low cost design that allows for many applications with the Arduino/Versalino, PIC, TI, and many other micro-controllers.

Just a few of the possible applications would be to measure current consumption of individual devices to track power usage by your projects, or to automatically turn off or throttle a machine that has exceeded it's current limit. Current sensing circuits are a great way to protect your valuable projects from damage or destruction that can often be caused by misuse or uncaught design flaws.

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Product Description

Package Contents:

Pololu Current Sensor 3.3 ~ 5.5V (logic) .045V/A output ACS711EX -31 ~ +31A @ < 100v in

Features/Specifications:

Current sense: 0.045 V/A (at 3.3 Volts, output is proportional to Vcc)
Minimum logic voltage: 3 V
Maximum logic voltage: 5.5 V
Supply current: 4 mA
Dimensions: 0.7″ x 0.8″
Maximum Current input: +-31 Amperes (May tolerate up to 100ms at 100 Amp, but not recomended or measurable)
Mazimum Voltage input: 100 Volts is the maximum recomended voltage. (Exceeding this voltage break voltage isolation and damaged attached devices and controllers)

(Usage information and diagrams provided by Pololu)

Usage diagram:

 

Pololu Current Sensor 3.3 ~ 5.5V (logic) .045V/A output ACS711EX -31 ~ +31A @ <100V in backside with coinPololu Current Sensor 3.3 ~ 5.5V (logic) .045V/A output ACS711EX -31 ~ +31A @ <100V in topside pinout

Operation of this sensor is relatively simple, all you need to do is put IP+ and IP- in series with your load (cut the source or drain line of your device/circuit and solder either side of the wire to IP+ and IP- respectively). Once the board is powered it will then produce an output voltage on the OUT pin that represents a number between -31 Amperes and +31 Amperes.

The FAULT output should latch high if the current limit is exceeded so that you can track whether or not your reading limit has been reached.

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