Hall Effect Sensor | ACS758LCB-050B Module | 50A Current Sensing

The ACS758 current sensor module measures both AC and DC currents up to 100A. This linear hall effect sensor works by detecting the magnetic field from the current, giving a safe, isolated analog voltage output for your microcontroller projects like Arduino or ESP32. Features and Benefits - Hall Effect Technology - Measures current without direct electrical contact, creating electrical isolation that protects your sensitive electronics from the high-power circuit. - High Current Capability - Offered in 50A (ACS758LCB-050B-PFF-T) and 100A bidirectional versions for monitoring motors, inverters, and chargers. - Very Low Resistance - The internal conductor path has a resistance of only 100 µΩ, which minimizes power loss and heat buildup. - Linear Analog Output - Provides a simple voltage that is directly proportional to the measured current, making it easy to read with a microcontroller's ADC. Applications - Power and Energy Monitoring - Build a device to track the energy consumption of appliances or an entire circuit. - Motor Control Systems - Measure current draw to implement overcurrent protection or closed-loop feedback for motor drivers. - Battery Management - Monitor charging and discharging currents in solar power systems, UPS backups, or custom battery packs. 🛠️ Tools Required To test a Hall Effect Sensor, you will need a multimeter capable of measuring voltage and continuity. A power supply, such as a 5V, 9V, or 12V DC power source, is essential to energise the sensor. You will also need jumper wires or test leads with alligator clips for making connections. For precise measurements, especially when testing current sensing modules like the ACS758LCB-050B, a current source or a known load will be beneficial to simulate current flow through the sensor. 📌 Pinout Identification The ACS758 Hall Effect Sensor module typically has three to five pins. Common pin configurations include VCC (power input, often 5V), GND (ground), and an output pin (Vout). Some modules may also have FAULT or ENABLE pins. For the ACS758LCB-050B, locate the VCC and GND pins to supply power, and the Vout pin for measuring the sensor's output signal. Always consult the specific sensor's datasheet or module silkscreen for accurate pin identification before connecting to power. 🧪 Method 1: Testing On-Bench (Removed from Circuit) Setup To set up for testing, connect the Hall Effect Sensor module to a stable power supply. Connect the VCC pin to the positive terminal of your 5V power supply and the GND pin to the negative terminal. Ensure all connections are secure to prevent intermittent readings. Position the multimeter to measure DC voltage. Connect the red probe of the multimeter to the sensor's Vout pin and the black probe to the GND pin of the power supply. Testing Digital Sensors (Switch / Latch Type) This particular product is a Linear Current Sensor, not a digital switch or latch type sensor. For linear current sensors like the ACS758LCB-050B, testing involves applying a known current through the sensor and observing a proportional voltage output on the Vout pin. If testing a digital Hall sensor (not this product), after powering it, bring a magnet near the sensor. A digital sensor will typically switch its output voltage between high and low states (e.g., 0V and 5V) when the magnetic field is detected or removed.