KY-035 Hall Magnetic Sensor Module - Analog & Digital Output
KY-035 Hall Magnetic Sensor Module — Analog & Digital Output
The KY-035 Hall magnetic sensor module detects magnetic fields using a Hall effect sensor. It provides both analog and digital output signals, making it versatile for proximity sensing, speed detection, and position tracking. With simple 3-pin connectivity, it's a reliable choice for microcontroller projects.
Key Specifications
| Specification | Value |
|---|---|
| Sensor IC | A3144 or equivalent Hall effect sensor |
| Operating Voltage | 4.5V – 5.5V DC |
| Output Type | Analog (magnetic field strength) & Digital (comparator with threshold) |
| Detection Range | Typically up to 10mm with a strong magnet |
| Output Current | 15mA max |
| Dimensions | 35mm × 15mm |
What You Can Build With This
- Magnetic door/window open-close detector for security systems
- RPM counter for motors using a magnet on the shaft
- Non-contact limit switch for CNC machines or 3D printers
- Magnetic field visualizer with an LED bar graph
Compatibility
The KY-035 works with any microcontroller that has ADC and digital I/O, such as Arduino Uno, ESP32, and Raspberry Pi Pico. The analog output connects to an ADC pin, while the digital output triggers when the magnetic field exceeds the potentiometer-set threshold. It operates at 5V logic; for 3.3V boards, use a level shifter on the digital pin if needed.
Wiring Notes
Connect VCC to 5V, GND to ground, and the analog pin (A0) or digital pin (D0) to your microcontroller. The on-board potentiometer adjusts the digital output sensitivity — turn clockwise to increase the trigger threshold. Avoid placing the sensor near large metal objects that may distort magnetic fields.
Why Buy from Compoden
Every component is sourced from verified suppliers and tested for compatibility before listing. We've spent 10 years building projects for makers, schools, and institutions across India. Ships from Bengaluru in 3-5 days. If defective on arrival, replace within 7 days.
Is this compatible with Arduino Uno?
Yes, the KY-035 works directly with Arduino Uno. Connect the analog output to A0 and the digital output to any digital pin, and use the analogRead() or digitalRead() functions.
What is the difference between analog and digital output pins?
The analog pin outputs a voltage proportional to the magnetic field strength, while the digital pin goes HIGH or LOW when the field crosses the threshold set by the potentiometer.
Does this sensor detect both poles of a magnet?
It depends on the specific sensor IC. The typical A3144 is a unipolar Hall sensor that responds to one magnetic pole (usually south). Check the sensor markings; some versions are omnipolar.
📦 Free Setup Handoff Document Included
Every Compoden order includes a free setup handoff document — step-by-step instructions to get your component working within minutes. Download it via QR code on your package. The handoff document is also trained to help you troubleshoot the majority of problems.
Ask Soldr above what you can build with this — it knows every Compoden kit this part appears in.
Shipping Information
- Prepaid Orders: ₹75 for orders up to ₹999, FREE shipping above ₹999
- COD Orders: ₹125 shipping + ₹50 COD fee = ₹175 total
- Delivery Timeline: Dispatch in 1-2 days, delivery in 2-7 days depending on location
Returns & Warranty
- 7-Day Return: Manufacturing defects only (approval required)
- Warranty: 7 days from delivery
- Non-Returnable: Batteries, consumables, cut wires, clearance items