{"product_id":"cm1-hall-effect-motor-speed-sensor-module-lm393-3144-diy","title":"CM1 Hall Effect Speed Sensor Module LM393 3144 – DIY Projects","description":"\n\u003ch2\u003eCM1 Hall Effect Counting Sensor Module – LM393 \u0026amp; 3144\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eCM1 Hall Effect Motor Speed Measurement Module\u003c\/strong\u003e is a compact, reliable sensor solution built around the industry-standard \u003cstrong\u003eLM393 comparator\u003c\/strong\u003e and \u003cstrong\u003e3144 Hall Effect sensor\u003c\/strong\u003e. Ideal for robotics, automation projects, speed counters, and DIY electronics builds, this module delivers accurate, real-time motor speed and pulse counting in a tiny form factor.\u003c\/p\u003e\n\n\u003ch3\u003eKey Specifications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMain Microchips:\u003c\/strong\u003e LM393 Comparator + 3144 Hall Effect Sensor\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWorking Voltage:\u003c\/strong\u003e DC 5V\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDimensions:\u003c\/strong\u003e Approx. 31.5 × 14.0 × 9.0 mm\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterials:\u003c\/strong\u003e Plastic + Metal construction\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInterface:\u003c\/strong\u003e 4-wire system (VCC, GND, Digital Output, Analog Output)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePack Options:\u003c\/strong\u003e Available in 1-piece or 5-piece packs\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eColor Options:\u003c\/strong\u003e 2 options available\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow It Works\u003c\/h3\u003e\n\u003cp\u003eThe \u003cstrong\u003e3144 Hall Effect sensor\u003c\/strong\u003e detects changes in a magnetic field — such as those produced by a rotating encoder disc or magnetic strip on a motor shaft — and outputs a digital signal. The onboard \u003cstrong\u003eLM393 comparator\u003c\/strong\u003e processes this signal and delivers a clean, stable digital output to your microcontroller (Arduino, Raspberry Pi, ESP32, etc.), making it perfect for counting pulses, measuring RPM, and tracking rotational speed.\u003c\/p\u003e\n\n\u003ch3\u003e4-Wire Interface Description\u003c\/h3\u003e\n\u003col\u003e\n  \u003cli\u003e\n\u003cstrong\u003eVCC:\u003c\/strong\u003e External 5V power supply\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eGND:\u003c\/strong\u003e Ground\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eD0:\u003c\/strong\u003e Digital signal output (for speed\/counting)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eA0:\u003c\/strong\u003e Analog signal output\u003c\/li\u003e\n\u003c\/ol\u003e\n\n\u003ch3\u003ePerfect For\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eArduino \u0026amp; microcontroller-based DIY projects\u003c\/li\u003e\n  \u003cli\u003eMotor RPM measurement \u0026amp; speed control loops\u003c\/li\u003e\n  \u003cli\u003ePulse counting applications\u003c\/li\u003e\n  \u003cli\u003eRobotics, smart vehicles \u0026amp; automation\u003c\/li\u003e\n  \u003cli\u003eEducational electronics experiments\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003ePackage Contents\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e1× or 5× CM1 Hall Effect Counting Sensor Module (LM393 + 3144)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eRelated Products You May Like\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/round-aluminum-wire-diy-jewelry-making-1mm-3mm\"\u003eRound Aluminum Wire 1mm–3mm | DIY Jewelry Making Wire\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/ccb-flat-round-spacer-beads-diy-jewelry-making\"\u003e4\/6mm CCB Flat Round Spacer Beads DIY Jewelry Making 100-200pcs\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eLearn more: \u003ca href=\"https:\/\/www.osha.gov\/personal-protective-equipment\" target=\"_blank\" rel=\"noopener\"\u003eOSHA on personal protective equipment\u003c\/a\u003e\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003ch4\u003eQ: What does the CM1 Hall Effect Counting Sensor Module do?\u003c\/h4\u003e\n\u003cp\u003eA: The CM1 module uses a 3144 Hall Effect sensor and an LM393 comparator chip to detect magnetic field changes from a rotating motor shaft or encoder disc. It outputs a clean digital (and analog) signal that microcontrollers can read to calculate motor speed (RPM) or count pulses in real time — making it an essential component for DIY speed-measurement and automation projects.\u003c\/p\u003e\n\u003ch4\u003eQ: What microcontrollers are compatible with the LM393 3144 Hall Sensor Module?\u003c\/h4\u003e\n\u003cp\u003eA: This module is compatible with virtually any 5V microcontroller platform, including Arduino (Uno, Nano, Mega), ESP8266, ESP32, Raspberry Pi (via a logic-level converter), STM32, and more. Simply connect VCC to 5V, GND to ground, and read the D0 digital output pin in your code.\u003c\/p\u003e\n\u003ch4\u003eQ: Do I need any external components to use this sensor module?\u003c\/h4\u003e\n\u003cp\u003eA: No additional components are required for basic operation. The onboard LM393 comparator and pull-up resistors are already integrated. You just need a 5V power source and a microcontroller to read the output. A magnet or magnetic encoder disc is required on the rotating shaft to trigger the Hall Effect sensor.\u003c\/p\u003e\n\u003ch4\u003eQ: What is the difference between the 1-piece and 5-piece pack options?\u003c\/h4\u003e\n\u003cp\u003eA: Both packs contain the exact same CM1 Hall Effect Sensor Module (LM393 + 3144). The 5-piece pack is ideal if you are building multiple projects, want spares on hand, or are stocking up for classroom\/lab use — offering better value per unit compared to the single-piece option.\u003c\/p\u003e\n\u003c!-- production-packaging-notice --\u003e\n\u003ch3\u003eProduction \u0026amp; Packaging Notice\u003c\/h3\u003e\n\u003cp\u003eTo maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.\u003c\/p\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"What does the CM1 Hall Effect Counting Sensor Module do?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"The CM1 module uses a 3144 Hall Effect sensor and an LM393 comparator chip to detect magnetic field changes from a rotating motor shaft or encoder disc. 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