Yl105 Datasheet Better | ((better))

F2211IN YL105 Alpha Wire | Cables, Wires - DigiKey Australia

: Eliminates the need for external voltage dividers or dedicated 3.3V power supplies that may not provide enough current on certain Arduino clones.

System ground line. Common ground shared with the microcontroller. yl105 datasheet better

~ 2800-2900 rpm (2 Pole) or ~ 1400-1450 rpm (4 Pole) Voltage: 220V/50Hz (or 110/220V dual voltage) Insulation Class: B or F (F offers better heat resistance)

In the world of hobbyist electronics and rapid prototyping, few components are as ubiquitous yet as poorly documented as the YL-105. At first glance, the YL-105—typically a 5V single-channel relay module—appears deceptively simple. A quick online search yields dozens of identical-looking datasheets: a pinout diagram, a maximum load rating (e.g., 10A at 250VAC), and a schematic of the PC817 optocoupler and JQC-3FF relay. However, treating this document as a simple "hook-and-go" guide leads to field failures, microcontroller resets, and even safety hazards. F2211IN YL105 Alpha Wire | Cables, Wires -

Because the official documentation is sparse, you must create your own through calibration. Do not trust the voltage readings out of the box.

The YL-105 features a dedicated 8-pin socket for the wireless module and a 6-pin/header interface for connection to your microcontroller. Pin Name Description Connection to Microcontroller (e.g., Arduino) Power Input Connect to 5V pin (The board regulates it to 3.3V) GND Connect to GND CE Chip Enable Connect to any digital pin (e.g., D7) CSN Chip Select Connect to any digital pin (e.g., D8) SCK Connect to D13 (Standard SPI SCK) MOSI SPI Master Out Connect to D11 (Standard SPI MOSI) MISO SPI Master In Connect to D12 (Standard SPI MISO) IRQ Optional (Not always required for basic setups) Key Advantages ~ 2800-2900 rpm (2 Pole) or ~ 1400-1450

SPI clock line driven by the master microcontroller.

The grid pattern consists of interlaced traces that are not connected. When dry, the resistance between them is near-infinite (open circuit). When raindrops bridge the gap, the water acts as a conductor, lowering the resistance significantly.