e-Gizmo 50A (125A peak) AC/DC Current Sensor Board HLSR 50-P BARE

The e-Gizmo HLSR 50-P AC/DC Current Sensor Breakout Board is a compact, high-performance solution designed for the precise electronic measurement of DC, AC, and pulsed currents. Built around the industrial-grade LEM HLSR 50-P open-loop Hall-effect current transducer, this breakout board operates on a single +5V rail and provides full galvanic isolation between your high-power primary circuit and your low-voltage microcontroller logic (such as Arduino, ESP32, or Raspberry Pi).

This Variant: BARE - No terminal & Trimpot



Specifications
Primary Sensor IC: LEM HLSR 50-P (Industrial Grade)
Sensing Technology: Open-Loop Hall Effect (ASIC-based)
Nominal Measuring Current (Ipn): +/- 50 A (AC or DC)
Peak Measuring Range: Up to +/- 125 A
Operating Supply Voltage: +5 V DC (Single Supply, +/- 10%)
Terminal Block Rating: Up to 57 A capacity, fits up to AWG 6 wire
Onboard Voltage Scaling: Supported via optional trimmer potentiometer (RV1 / JP1)
Sensitivity: 16 mV/A (Default, un-attenuated)
Frequency Bandwidth: 0 to 400 kHz (-3 dB)
Accuracy at 25 deg C: +/- 1%
Response Time (tr): 2.5 us
Operating Temperature: -40 deg C to +105 deg C (Sensor rating)
PCB Dimensions: 52 mm x 22 mm

Pinout & Configuration
Control Interface Header (JP1)The secondary side features a standard 2.54 mm pitch, 4-pin header for easy breadboarding or jumper wire connections:
1. +5V: Single Positive Power Supply Input (+4.5 V to +5.5 V DC).
2. GND: Common Ground connection.
3. OUT: Analog Output Voltage proportional to the primary measured current.
Formula (Default): Vout = 2.5 V +/- (0.016 V * I_primary)At 0 A, the output sits at the reference voltage (2.5 V).
4. REF: Reference Voltage Output. Outputs a stable, buffered 2.5 V signal representing the mid-point reference. Connect this to a second ADC channel on your microcontroller to dynamically correct for system offsets and temperature drift.