Yl105 Datasheet !new! ❲Exclusive Deal❳

YL105 Datasheet: A Complete Guide to the 5V Single-Channel Relay Module

Introduction

In the world of electronics and microcontroller projects (Arduino, Raspberry Pi, ESP8266, STM32), the ability to control high-power devices—such as lamps, motors, solenoids, and pumps—using low-power logic signals is essential. The YL105 is one of the most popular and widely available single-channel relay modules designed precisely for this purpose.

| Feature | YL105 | SRD-05VDC-SL-C (bare relay) | KY-019 | Songle 1-channel | |-------------|-----------|--------------------------------|------------|----------------------| | Opto-isolated | Yes | No | Yes | Yes | | Active LOW/HIGH selectable | Yes (jumper) | No | Fixed HIGH | Fixed LOW | | LED indicators | Power + Status | None | Power + Status | Power + Status | | Screw terminals | Yes (3 pins) | No | Yes (3 pins) | Yes (3 pins) | | Typical price | $2–$4 | $1 | $3–$5 | $2–$4 | yl105 datasheet

If it is an 8-pin IC variant, pins generally include VCC (Power), GND (Ground), FB (Feedback), and OUT (Signal Output). Consult the diagram on the physical datasheet to avoid reverse polarity, which can lead to component failure. 4. Typical Applications YL105 Datasheet: A Complete Guide to the 5V

(functions.RelatedSearchTerms)

Key Features

• Single relay – Controls one independent load.
• Active LOW or HIGH trigger – Configurable via a jumper (explained below).
• Opto-isolation – Separates the microcontroller side from the load side for safety.
• LED indicators – Power LED (red) and relay activation LED (green/blue).
• Standard 3-pin control interface – VCC, GND, and Signal (IN).
• Screw terminals – For easy connection to the load (Common, Normally Open, Normally Closed).