void setup() pinMode(sensorPin, INPUT); pinMode(ledPin, OUTPUT); Serial.begin(9600);
: Receives SPI data from the RF module to the MCU.
The YL-105 operates as an intermediate power conditioner. While it alters the supply voltage to safe thresholds, it passes the SPI data lines directly through to the microchip breakout header. yl-105 datasheet
The on the module compares this reading against a threshold set by the onboard potentiometer. If the soil is drier than the threshold, the Digital Output (DO) pin goes LOW. 5. Application and Usage Examples
Since no official YL-105 datasheet exists, here are the actual technical specs you need for circuit design and coding. The on the module compares this reading against
Connect DO to an Arduino digital pin with a pull-up resistor enabled (or use INPUT_PULLUP ). Place a small neodymium magnet on a rotating shaft. Each time the magnet passes the YL-105, the output goes LOW. Use interrupts to count pulses per minute.
Tip: For best results, use a south pole facing the sensor. The 49E is most sensitive to south pole magnetic fields. Application and Usage Examples Since no official YL-105
It prevents permanent damage to the NRF24L01 module, which can occur if accidentally connected to a 5V power pin without regulation. Alternate Identification
Note: In some niche electronic contexts, "YL-105" may also refer to an 8-pin adapter board specifically designed for the radio module to simplify wiring and power regulation. Infrared Motion Sensor Alarm YL-105 Instruction Manual
The YL-105 serves a crucial function—stabilizing the power supply for the NRF24L01, which is sensitive to voltage fluctuations. Its key specifications are:
Typically 5 Vdc (Acceptable up to 10 Vdc on some models) 1.2.1. Bridge Resistance: 350 ohm 1.2.1. Wetted Parts Material: 17-4 PH stainless steel 1.2.1. Electrical Termination: PTIH-10-6P (or equivalent) 1.2.1. 3. Applications of the YL-105 Sensor