<p>Please look into <a href="/q/9970/">this question</a>, this is a very similar question and also involves PWM and a RAMPS 1.4 shield. </p>

<p>In your case you connect the top red wire on the right bottom connector to the D4 pin and adjust the firmware accordingly as described in <a href="/a/9972/">this answer</a>.</p>

<p>The bottom 2 wires of the lower right connector should be connected to ground and 12&nbsp;V (resp. black and red).</p>

<p><a href="https://i.sstatic.net/Fyq2B.png" rel="nofollow noreferrer"><img src="https://i.sstatic.net/Fyq2B.png" alt="Wiring of laser power control module"></a></p>

CC BY-SA 4.0
2019-05-29T12:36:34.753Z
2019-06-03T08:23:31.447Z
2019-06-03T08:23:31.447Z
0scar
<p>I'm totally lost. I have been searching about two days how to correctly wire Blue Laser LA03-5000 to RAMPS 1.4 board. </p>

<p>This laser has 12&nbsp;V input and separates PWM/TTL wires. I have found out how to control laser with no PWM (just hook it to D9 same as a fan), but how do I correctly wire this type of laser? I really want to wire it correctly for safety reasons. </p>

<p><a href="https://i.sstatic.net/Noo3R.png" rel="nofollow noreferrer" title="Blue Laser LA03-5000"><img src="https://i.sstatic.net/Noo3R.png" alt="Blue Laser LA03-5000" title="Blue Laser LA03-5000"></a></p>

<marlin><ramps-1.4><laser><cnc>
Laser LA03-5000 wiring to RAMPS 1.4
Fires_CZ
# Laser LA03-5000 wiring to RAMPS 1.4

(Asked by: username_0 on 2019-05-29)

I'm totally lost. I have been searching about two days how to correctly wire Blue Laser LA03-5000 to RAMPS 1.4 board.

This laser has 12 V input and separates PWM/TTL wires. I have found out how to control laser with no PWM (just hook it to D9 same as a fan), but how do I correctly wire this type of laser? I really want to wire it correctly for safety reasons.

[![Blue Laser LA03-5000](https://i.sstatic.net/Noo3R.png "Blue Laser LA03-5000")](https://i.sstatic.net/Noo3R.png "Blue Laser LA03-5000")

**Tags:** marlin, ramps-1.4, laser, cnc


---

## 1 answers

### Answer by username_1 on 2019-05-29. Score: 1

Please look into [this question](/q/9970/), this is a very similar question and also involves PWM and a RAMPS 1.4 shield.

In your case you connect the top red wire on the right bottom connector to the D4 pin and adjust the firmware accordingly as described in [this answer](/a/9972/).

The bottom 2 wires of the lower right connector should be connected to ground and 12 V (resp. black and red).

[![Wiring of laser power control module](https://i.sstatic.net/Fyq2B.png)](https://i.sstatic.net/Fyq2B.png)


---

