Datasheet — Yl-105

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It was her. Subject 4. Dr. Mina Sorensen, the lead hardware engineer on the YL-105 project. According to the files, she had died in the breach. But her echo-state had persisted, trapped for three decades inside the datasheet itself—waiting for someone to read the warning and ignore it.

The board features a dual-row header layout on top to host the 8-pin nRF24L01+ module, while exposing a single row of breadboard-friendly header pins for easy MCU wiring.

A water quality monitoring device designed to measure residual chlorine content, indicating whether a water supply has been properly chlorinated to eliminate pathogens. It features M39x1.5 threading, a 5-meter cable, and offers both 4-20mA analog output and RS485 digital communication options. yl-105 datasheet

Guide for Soil Moisture Sensor YL-69 or HL-69 with the Arduino

Aris worked from a converted salvage station orbiting the Moon. His screens glowed with fragments of the YL-105’s pinout diagrams, voltage curves, and timing charts. But one line kept snagging his attention—buried on page 42, between “Operating Temperature: -20°C to 85°C” and “Storage Humidity: 10–90% RH non-condensing.”

: Dimensions typically measure 26 x 19 x 12 mm or up to 33 x 25 mm depending on the specific manufacturing variant. This public link is valid for 7 days

: Temporary protection for rooms, closets, or sheds.

The YL-105 is a cordless, self-contained security device. Its technical specifications are:

If you can share a photo or the IC marking, I will give you the exact pinout and a sample circuit. Can’t copy the link right now

🛠️ : Bridges the gap between 5V microcontrollers (like Arduino Uno) and 3.3V wireless chips.

Connecting remote, low-power sensors to a central hub.