The YL-105 provides an 8-pin female header for the nRF24L01 and a 6-pin/8-pin male header for connection to a microcontroller. Instructables Description Connect to (regulated to 3.3V onboard) Common Ground Chip Enable (activates RX or TX mode) SPI Chip Select Not (signals start of SPI communication) SPI Master Out Slave In SPI Master In Slave Out Interrupt Request pin (optional) 🛠️ Key Features & Benefits Built-in Voltage Regulator:
: A small surface-mount current-limiting resistor is placed in series with an SMD LED to visually verify that input power is active. Hardware Hookup and Microcontroller Implementation
: Features an active AMS1117-3.3 Low Dropout (LDO) linear regulator. Input Supply Voltage ( VCCcap V sub cap C cap C end-sub
Proper placement is critical for optimal performance. Because PIR sensors achieve highest sensitivity when a person moves laterally (across) the lens rather than directly toward or away from it, the installation angle and height significantly affect the protection area. Manufacturers recommend mounting the universal base at approximately 2 meters (about 6.5 feet) above ground level. The unit should be positioned at a 10–30 degree angle from the wall for maximum detection distance, and the protected area must remain unobstructed for clear line-of-sight. yl-105 datasheet
Using the YL-105 simplifies wiring. Because the adapter natively adapts the logic lines, you can interface it directly with standard 5V microcontrollers like the Arduino Uno without logic level shifters. Circuit Connections (YL-105 to Arduino Uno) Connect on the YL-105 to the 5V pin on the Arduino. Connect GND on the YL-105 to the GND pin on the Arduino. Connect CE to Pin 7 (or any chosen digital I/O pin). Connect CSN to Pin 8 (or any chosen digital I/O pin). Connect MOSI to Hardware SPI Pin 11 . Connect MISO to Hardware SPI Pin 12 . Connect SCK to Hardware SPI Pin 13 .
Whether you are building a simple non-contact switch or an advanced magnetic field logger, the YL-105 delivers reliable performance. Always refer to the component-level datasheets for electrical characteristics, and use the module’s potentiometer to dial in the perfect detection range for your application.
Digital TTL signal (0 or 1). Usually, it outputs Low (0V) when an obstacle is detected and High (VCC) when the path is clear. The YL-105 provides an 8-pin female header for
When makers build wireless communication networks using the nRF24L01+ module, they frequently run into transmission failures, intermittent connection drops, or hardware degradation. This happens due to two specific engineering constraints: Another NRF24 problem - works on one Uno but not others
If you can share a photo or the IC marking, I will give you the exact pinout and a sample circuit.
If you have downloaded the YL-105 datasheet (or the 49E sensor datasheet which is 90% relevant), pay close attention to these sections: Input Supply Voltage ( VCCcap V sub cap
: Can be modified by hobbyists to trigger external relays or IoT notifications. 🔌 Pinout & Wiring (Adapter Version)
| Parameter | Value | |-----------|-------| | | 3.5V – 5.5V DC (typical 5V) | | Output Type | Digital (TTL logic) | | Output Logic | Active Low (output LOW when magnetic field detected) or Active High (configurable via onboard jumper) | | Sensitivity Adjustment | Yes – 10-turn potentiometer | | Comparator IC | LM393 (dual differential comparator) | | Hall Sensor | 49E (linear analog output) | | Detection Range | Up to ~15mm (depending on magnet strength) | | Response Time | < 2µs | | Operating Temperature | -40°C to +85°C | | PCB Dimensions | Approx. 32mm x 20mm | | Mounting Hole Diameter | 3mm |
Have a specific question about the YL-105 or Hall effect sensors? Leave a comment or consult our technical forum for community-driven support.
The YL-105 is a compact, affordable, and versatile soil moisture sensor module frequently used in DIY gardening, agricultural automation, and Arduino projects. This article provides a detailed for the YL-105 , covering its technical specifications, pinout, working principle, and practical application examples . 1. Introduction to the YL-105 Sensor
