CM1 Hall Effect Speed Sensor Module LM393 3144 – DIY Projects

CM1 Hall Effect Counting Sensor Module – LM393 & 3144

The CM1 Hall Effect Motor Speed Measurement Module is a compact, reliable sensor solution built around the industry-standard LM393 comparator and 3144 Hall Effect sensor. 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.

Key Specifications

• Main Microchips: LM393 Comparator + 3144 Hall Effect Sensor
• Working Voltage: DC 5V
• Dimensions: Approx. 31.5 × 14.0 × 9.0 mm
• Materials: Plastic + Metal construction
• Interface: 4-wire system (VCC, GND, Digital Output, Analog Output)
• Pack Options: Available in 1-piece or 5-piece packs
• Color Options: 2 options available

How It Works

The 3144 Hall Effect sensor 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 LM393 comparator 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.

4-Wire Interface Description

1. VCC: External 5V power supply
2. GND: Ground
3. D0: Digital signal output (for speed/counting)
4. A0: Analog signal output

Perfect For

• Arduino & microcontroller-based DIY projects
• Motor RPM measurement & speed control loops
• Pulse counting applications
• Robotics, smart vehicles & automation
• Educational electronics experiments

Package Contents

• 1× or 5× CM1 Hall Effect Counting Sensor Module (LM393 + 3144)

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Frequently Asked Questions

Q: What does the CM1 Hall Effect Counting Sensor Module do?

A: 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.

Q: What microcontrollers are compatible with the LM393 3144 Hall Sensor Module?

A: 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.

Q: Do I need any external components to use this sensor module?

A: 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.

Q: What is the difference between the 1-piece and 5-piece pack options?

A: 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.

Production & Packaging Notice

To 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.