Description Boardoza SM351LT Hall Effect Sensor is a compact magnetic position sensing breakout board for detecting lid, door, drawer, enclosure, and mechanism position changes without physical contact. Built around the Honeywell SM351LT magnetoresistive sensor, it responds to magnetic fields and provides a digital output for embedded control and monitoring projects. The module supports 3.3V to 5V operation and uses a push-pull output, so no external pull-up resistor is required. Its omnipolar sensing behavior allows it to activate with either pole of a magnet, simplifying mechanical placement in sealed enclosures, smart access projects, and battery-powered devices. Features Magnetic position sensing: detects lid, door, drawer, and enclosure open/closed states using a magnet. SM351LT sensor: based on the Honeywell SM351LT magnetoresistive sensor. Omnipolar operation: responds to either north or south pole of a magnet for flexible installation. Push-pull output: digital output does not require an external pull-up resistor. 3.3V to 5V supply: compatible with common microcontroller logic and embedded platforms. Status indicators: includes power good LED and output indicator LED for quick feedback. Compact breakout board: 20mm x 20mm board size for small mechanisms and sensor nodes. Specifications Product Boardoza SM351LT Hall Effect Sensor Sensor Model Honeywell SM351LT Sensor Type Magnetoresistive sensor Function Magnetic position detection Voltage Supply 3.3V - 5V Voltage Input Type 3-pin 2.50mm header Current Consumption 150uA Output Type Push-pull digital output Operate Sensing Range Typical 7 Gauss Operating Temperature -40°C to +85°C Board Dimensions 20mm x 20mm Shipping Weight 20g Dimensions Applications Door, lid, drawer, and enclosure open/closed detection. Non-contact magnetic position sensing in sealed or protected devices. Smart home, access control, and cabinet monitoring projects. Battery-powered sensor nodes that need low-current position detection. Microcontroller experiments using digital magnetic sensor output. Product List 1 Boardoza SM351LT Hall Effect Sensor Other Content Pinout: VCC, OUT, and GND are provided on the 3-pin header. Output note: OUT is a push-pull digital output and does not need an external pull-up resistor. Magnet note: omnipolar operation allows sensing with either pole of a magnet. Indicator note: D1 is the power good LED and D2 is the output indicator LED according to the official documentation. Mechanical note: the official repository provides a STEP file for enclosure and mounting reference. Resources Official GitHub Repository Boardoza SM351LT Datasheet Boardoza SM351LT STEP File FAQ What is the Boardoza SM351LT Hall Effect Sensor used for? It is used for non-contact magnetic position detection in door, lid, drawer, enclosure, and mechanism monitoring projects. Which sensor does the board use? The official documentation lists the Honeywell SM351LT magnetoresistive sensor. What supply voltage does it support? The official documentation lists 3.3V to 5V voltage supply. Does the output need a pull-up resistor? No. The official documentation lists a push-pull output with no external pull-up required. What is the board size? The official board dimensions are 20mm x 20mm.
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