Read the AO pin with an ADC. The analog voltage will change as a magnet moves parallel to the sensor face. Calibrate the ADC reading to distance. This is not a high-precision linear encoder, but it works for coarse position feedback (e.g., throttle position, linear actuator feedback).
The YL-105 is not a bare Hall effect IC; it is a complete, ready-to-use Hall effect magnetic sensor module. It typically features a 49E (or equivalent) linear Hall sensor, a comparator circuit (often an LM393), a potentiometer for adjustable sensitivity, and onboard power regulation. The module outputs a clean digital signal (HIGH/LOW) based on the presence of a magnetic field, making it directly compatible with 3.3V and 5V microcontrollers like Arduino, Raspberry Pi, and ESP32.
The "YL" prefix indicates the manufacturer or PCB designer family (often associated with generic Chinese sensor modules), but the underlying sensor follows the standard 49E Hall effect sensor specifications. yl-105 datasheet
The module has an onboard potentiometer (blue box). This adjusts the reference voltage for the LM393 comparator.
Common calibration: Place the sensor 5mm above a white surface. Turn the potentiometer until the onboard LED just turns off. Now, the module will trigger reliably when seeing white vs. black. Read the AO pin with an ADC
If you want to replicate the YL-105 function on a custom PCB, here is the minimal bill of materials:
The circuit is well-documented in the LM393 datasheet’s "window comparator" or "level detector" section. Common calibration: Place the sensor 5mm above a
If you have downloaded the YL-105 datasheet (or the 49E sensor datasheet which is 90% relevant), pay close attention to these sections:
| Parameter | Value | | :--- | :--- | | Operating Voltage | 5V DC (Typical range 4.5V - 5.5V) | | Operating Current | < 4mA (Typical ~2.5mA) | | Receiving Sensitivity | -105dBm to -110dBm (Excellent for the price) | | Frequency | 433.92 MHz (Also available in 315MHz) | | Modulation Rate | 2KBps - 10KBps (Typical) | | Operating Temperature | -20°C to +70°C | | Dimensions | Approx. 30mm x 12mm |
In the world of embedded systems, robotics, and industrial automation, few components are as useful yet as underappreciated as the Hall effect sensor. Among the myriad of options available, the YL-105 stands out as a popular, reliable, and cost-effective solution for non-contact magnetic switching. Whether you are a hobbyist building a tachometer for a DIY fan, a student working on a security system, or an engineer prototyping a position sensor, finding the official YL-105 datasheet is your first critical step.
This article serves as an extensive resource. We will dissect the YL-105 datasheet, explain its electrical characteristics, pinout, operating principles, typical application circuits, and compare it with similar modules. By the end, you will have all the technical documentation needed to integrate the YL-105 into your project confidently.