Jul 5, 2022
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Hướng dẫn sử dụng module relay 2 kênh có nguồn cách ly với Arduino

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Sometimes you want your Arduino to control AC powered devices like lamps, fans or other household devices. But because the Arduino operates at 5 volts, it cannot directly control these higher voltage devices.

That’s where the relay module comes in. You can use a relay module to control the AC mains and Arduino to control the relay.

This tutorial walks you through how to setup the relay to switch on a lamp or other device, but let’s begin with a short introduction into relays.

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