<p>The signal generated by the <code>ESC</code> is a sine wave, where between each of the three output wires there is an phase difference of <code>120°</code>.</p>
<p>I suggest you use some connector to solder on the ends of the wires and on the <code>ESC</code> output. Then, you simply connect a motor wire to an <code>ESC</code> output. If you don't have or don't want to use a connector, just solder.</p>
<p>When turn on, if the motor turns in a direction you don't want, you have two options:</p>
<ol>
<li><p>Configure the radio/controller to invert the <code>ESC</code> signal</p>
</li>
<li><p>Exchange two <code>ESC</code> or motor wires between them</p>
</li>
</ol>
<p>For exemple:</p>
<p>The motor wire are <code>M1</code>, <code>M2</code> and <code>M3</code>, and the <code>ESC</code> output is <code>ESC1</code>, <code>ESC2</code> and <code>ESC3</code>.
So, connect:</p>
<p><code>M1</code>===<code>ESC1</code></p>
<p><code>M2</code>===<code>ESC2</code></p>
<p><code>M3</code>===<code>ESC3</code></p>
<p>If the motor turns in a direction you don't want, exchange the connections like:</p>
<p><code>M1</code>===<code>ESC3</code></p>
<p><code>M2</code>===<code>ESC2</code></p>
<p><code>M3</code>===<code>ESC1</code></p>

CC BY-SA 4.0
2021-06-17T17:40:03.777Z
I'm looking for the connection guide. In a picture I found online they connected the middle(black) to the end of ESC and the yellow to the end of ESC. Is that the proper connection to make or do I have to connect all the wires in serial
Venkatesh Talacheeru
CC BY-SA 4.0
2021-06-17T17:43:43.880Z
You must connect the wires individually, not in series or in parallel. [Look this tutorial](https://blog.dronetrest.com/how-to-connect-motors-and-esc/).
Arcaniaco
CC BY-SA 4.0
2021-06-17T17:47:03.023Z
Yeah, this is the picture I'm talking about. Are those the correct way to connect the Opto esc to the motor. What about the reverse rotations?
Venkatesh Talacheeru
CC BY-SA 4.0
2021-06-17T18:39:18.817Z
Exchange the motor input wires in the `ESC` output wires. I will update the post with a exemple.
Arcaniaco
CC BY-SA 4.0
2021-06-17T17:29:19.373Z
2021-06-17T18:43:36.940Z
2021-06-17T18:43:36.940Z
Arcaniaco
<p>I'm using 30A Opto 2-4s LIPo Blheli-S ESC for my drone. And I'm currently confused about how to connect the BLDC motor to the ESC. I found nothing online that currently explains the type of connections for my ESC type.</p>
<blockquote>
<p>ESC: 30A BLHELI-S Opto</p>
</blockquote>
<blockquote>
<p>MOTOR: A2212/6T 2200KV</p>
</blockquote>
<p><a href="https://i.sstatic.net/umnZS.jpg" rel="nofollow noreferrer">https://i.sstatic.net/umnZS.jpg</a></p>
<p><a href="https://i.sstatic.net/qFjRa.jpg" rel="nofollow noreferrer">https://i.sstatic.net/qFjRa.jpg</a></p>

<esc><brushless-motors>
How to connect Opto esc to BLDC Motor
Venkatesh Talacheeru
# How to connect Opto esc to BLDC Motor

(Asked by: username_0 on 2021-06-17)

I'm using 30A Opto 2-4s LIPo Blheli-S ESC for my drone. And I'm currently confused about how to connect the BLDC motor to the ESC. I found nothing online that currently explains the type of connections for my ESC type.

> ESC: 30A BLHELI-S Opto

> MOTOR: A2212/6T 2200KV

<https://i.sstatic.net/umnZS.jpg>

<https://i.sstatic.net/qFjRa.jpg>

**Tags:** esc, brushless-motors

---

## 1 answers

### Answer by username_1 on 2021-06-17. Score: 3

The signal generated by the `ESC` is a sine wave, where between each of the three output wires there is an phase difference of `120°`.

I suggest you use some connector to solder on the ends of the wires and on the `ESC` output. Then, you simply connect a motor wire to an `ESC` output. If you don't have or don't want to use a connector, just solder.

When turn on, if the motor turns in a direction you don't want, you have two options:

1. Configure the radio/controller to invert the `ESC` signal
2. Exchange two `ESC` or motor wires between them

For exemple:

The motor wire are `M1`, `M2` and `M3`, and the `ESC` output is `ESC1`, `ESC2` and `ESC3`.
So, connect:

`M1`===`ESC1`

`M2`===`ESC2`

`M3`===`ESC3`

If the motor turns in a direction you don't want, exchange the connections like:

`M1`===`ESC3`

`M2`===`ESC2`

`M3`===`ESC1`

> **Comments:**
> **username_0**: I'm looking for the connection guide. In a picture I found online they connected the middle(black) to the end of ESC and the yellow to the end of ESC. Is that the proper connection to make or do I have to connect all the wires in serial  
> **username_1**: You must connect the wires individually, not in series or in parallel. [Look this tutorial](https://blog.dronetrest.com/how-to-connect-motors-and-esc/).  
> **username_0**: Yeah, this is the picture I'm talking about. Are those the correct way to connect the Opto esc to the motor. What about the reverse rotations?  
> **username_1**: Exchange the motor input wires in the `ESC` output wires. I will update the post with a exemple.  

---

