Posts tagged with Songle

ESP8266 5V Wi-Fi relay switch modules

Posted | Updated
Filed under Electronics

ESP8266 5V Wi-Fi Relay Switch Modules

ESP8266 5V Wi-Fi relay switch modules are Wi-Fi enabled, relay power switches with an ESP-01 board. They can be controlled wirelessly from smart devices.

Relay switch modules

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Filed under Electronics

Relay switch modules are used as high-voltage AC switches using DC power. It is made up of a relay, screw terminals, a resistor, diode, capacitor, transistor and LED.

Nofollow, noreferrer and noopener

Posted | Updated 4 March 2021
Filed under WordPress

Nofollow, noreferrer and noopener rel attribute values

HTML has various ways for search engines and web browsers to understand data. Here we show how to use nofollow, noreferrer and noopener as rel attribute values.