Sonoff SV – WiFi Wireless Switch Module

The SONOFF SV (Safe Voltage) is a unique, “DIY-friendly” smart switch designed for low-voltage projects. Unlike standard smart switches that handle high-voltage household electricity, this board operates on 5V to 24V, making it the perfect tool for hackers, hobbyists, and anyone looking to automate low-power electronics.

Here is a human-friendly breakdown of what makes it special:

What makes the SONOFF SV different?

• Low Voltage Versatility: It runs on a 5-24V power supply. This is ideal for automating things like LED strips, electronic door locks, or battery-operated devices.

• Power Isolation (Dry Contact Potential): With a bit of simple soldering (moving two resistors), you can separate the power for the board from the power for the device you are controlling. This allows you to control both AC and DC loads independently.

• A Playground for Developers: If you like to code or build your own systems, the SV has GPIO pins reserved. This means you can add your own sensors or flash your own firmware to customize its behavior.

• Remote Control from Anywhere: Once connected to your Wi-Fi, you can use the eWeLink app to toggle your devices from across the world using Amazon’s secure AWS servers.

• Smart Scheduling: Set up to 8 different timers, including countdowns or recurring schedules, to automate your daily routines and save power.

Best Uses for the SONOFF SV:

• Smart Door Locks: Automate your 12V electric strike or magnetic lock.

• Custom LED Lighting: Control low-voltage light strips without bulky adapters.

• Hobbyist Projects: Perfect for anyone using Raspberry Pi or Arduino who needs a Wi-Fi-connected relay.

• Garage Openers: A popular choice for triggering garage door control boards safely.

Quick Technical Summary:

• Power Input: 5V to 24V DC.

• Connectivity: 2.4GHz Wi-Fi (No hub required).

• Voice Ready: Fully compatible with Alexa, Google Home, and IFTTT.

• Ultra-Lightweight: Only 15g—easy to tuck away inside small project boxes.

Note for DIYers: This is a “naked” board (it does not come with a plastic shell) and is designed for users who are comfortable with basic wiring or soldering.