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Revision to Laser PWM control

David Crocker

 
 
== Controlling a PWM Laser with thea Duet 2 Board ==

NOTE: Duet 3 main board board revisions 1.0 and later have a 5V-level output that may be suitable for controlling your PWM laser directly.
== Controlling a PWM Laser with thea Duet 2 Board ==

NOTE: Duet 3 main board board revisions 1.0 and later have a 5V-level output that may be suitable for controlling your PWM laser directly.
 
=== Assumptions ===
* You want to control the laser with M3 and M5 commands
* You have a laser module
* You have a Duet 2 board
* You have a Duet 2 board
 
Assuming the above asumptionsassumptions are correct for you, then you can continue with this guide.
Assuming the above asumptionsassumptions are correct for you, then you can continue with this guide.
 
=== Preparation ===
[image|761]
 
The Duet 2 board will not be able to drive the laser's PWM directly, and will need some interfacing electronics. The circuit diagram for the needed circuit, including protection for shorting of 3v3 line to prevent unintended Laser Power on is shown below.
The Duet 2 board will not be able to drive the laser's PWM directly, and will need some interfacing electronics. The circuit diagram for the needed circuit, including protection for shorting of 3v3 line to prevent unintended Laser Power on is shown below.
 
There is an [https://easyeda.com/keyz182/laserpwmduet|EasyEDA project here] with the circuit, released as Open Source to utilise if needed.

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