user70607: I wanted to d a simple circuit using Arduino to control the lights in my house. But i do not know which relay module to use my house runs on standard 220v ac.
Can anyone tell me weather this relay board will be enough
https://www.roboelements.com/wp-content/uploads/2018/10/1-Channel-5V-Relay-Module-for-Arduino-with-Optocoupler.jpg
Or should I buy a 2 channel one?
And another thing what is the difference between 1 channel and 2 channel relay board.
I'm a complete beginner, so please help me out.

user31105: Yes, you can use those. You have to watch a few things:

Input voltage: 5V, perfect for Arduino
Output voltage: 220 V, perfect for 220V AC
Output amperage: 10A, what you control should use max 10 A, and I would use max 5A, and also consider switching on current into account. However, 10A is a lot of current.

The difference between 1 and 2 channels relay boards, is just that there are either 1 or 2 of them, meaning you can control 1 or 2 motors independently from each other.

70607: <p>I wanted to d a simple circuit using Arduino to control the lights in my house. But i do not know which relay module to use my house runs on standard 220v ac.
Can anyone tell me weather this relay board will be enough</p>
<p><a href="https://www.roboelements.com/wp-content/uploads/2018/10/1-Channel-5V-Relay-Module-for-Arduino-with-Optocoupler.jpg" rel="nofollow noreferrer">https://www.roboelements.com/wp-content/uploads/2018/10/1-Channel-5V-Relay-Module-for-Arduino-with-Optocoupler.jpg</a></p>
<p>Or should I buy a 2 channel one?
And another thing what is the difference between 1 channel and 2 channel relay board.</p>
<p>I'm a complete beginner, so please help me out.</p>
 31105: <p>Yes, you can use those. You have to watch a few things:</p>
<ul>
<li>Input voltage: 5V, perfect for Arduino</li>
<li>Output voltage: 220 V, perfect for 220V AC</li>
<li>Output amperage: 10A, what you control should use max 10 A, and I would use max 5A, and also consider switching on current into account. However, 10A is a lot of current.</li>
</ul>
<p>The difference between 1 and 2 channels relay boards, is just that there are either 1 or 2 of them, meaning you can control 1 or 2 motors independently from each other.</p>
