How to put LED control on the web interface and touch screen



  • Hi,

    Have wired all my LED strips on to heater 5 of the Duex 5 board. Some 80W of high power LEDs to light out a black encased Modix3D Big60V3.
    Like the fact that I can share a single 24V power supply and have g-code control over the amount of light it creates. 100% PWM is super bright and allows for filming of fast movement speeds. 10% PWM is decent for more of a standby light when you walk up.

    Here is how it is configured in config.g:

    ; LED Lights - Duex5
    M307 H6 A-1 C-1 D-1				; Use heater 5 for LED lights on Duex5
    M42 P6 S1.0					; Set full bright
    

    My question: How do I get a slider or control onto the web control page as well as the touch panel? Would like to walk up and change the brightness with a simple touch (or slider on the web interface).

    As an added benefit: Is there a way to reset the brightness to e.g. 10% PWM after x seconds?

    Thanks a lot!



  • You could set the LED's up as a fan.
    That way you could use a fan slider on DWC.

    In terms of getting the value to revert after X seconds, I'm not sure that will be possible until variables are available as part of 3.02



  • @jay_s_uk Can a heater output be turned into a fan? The reason I had to hook it up to heater 5 was because I am drawing some 4A for all the combined LEDs, whereas fan outputs only support 1.5A

    M950 does not seem to allow both heater and fan to be specified at the same time.

    Thanks!


  • administrators

    Yes with RRF 3.1 you can configure a heater output to support a fan.

    The timeout can probably be done using the daemon.g file.



  • You can certainly use a heater output has a fan.

    Your M307 command is disabling heater 6 from being a heater so you're halfway there.
    You can then use M106 to assign P6 as a fan and control it that way.

    In RRF3, its much easier to assign pins as nothing has a default use



  • @dc42 Upgrading to 3.1 is on my roadmap. As soon as we get the next printer put together I will go there.

    Thanks a lot for the suggestion!



  • @jay_s_uk said in How to put LED control on the web interface and touch screen:

    You can certainly use a heater output has a fan.

    Your M307 command is disabling heater 6 from being a heater so you're halfway there.
    You can then use M106 to assign P6 as a fan and control it that way.

    In RRF3, its much easier to assign pins as nothing has a default use

    Ah - just what I was looking for.

    Here is the new config.g snippet in case others are looking to control LEDs with the Duet/Duex through the web interface:

    ; LED Lights - Duex5
    M307 H6 A-1 C-1 D-1				; Use heater 5 for LED lights on Duex5
    M106 P6 S1.0 C"LEDs" A6				; Map to fan control, name and set to full bright
    
    

    Now with a web frontend slider:

    Screen Shot 2020-06-09 at 11.45.20 PM.png

    Thank you very much!



  • And found a way to lower the light level after 30 mins. A bit of a hack but uses the fan controls blip timer:

    ; LED Lights - Duex5
    M307 H6 A-1 C-1 D-1				; Use heater 5 for LED lights on Duex5
    M106 P6 B1800 C"LEDs" A6			; Map to fan control, name and set to full bright for 30 min
    M106 P6 S0.01					; Trigger burst of 1800 sec 30 min full bright than go to 1%
    

    This will turn on the LEDs to full bright on startup or whenever coming off 0%, then go to the selected percentage.

    Only downside is that you cannot dim the LEDs during those 30 min, but you can turn them off.


  • Moderator

    @fxstein That's clever.



  • hello friends, I tried to turn on my lighting in this way on rrf3 and was unsuccessful, could my code be wrong?
    ; Iluminação
    M950 F3 C"exp.heater5"
    M106 P3 B300 C"LUZ" S1
    M106 P3 S0.2
    the slider appears to me, but I don’t have the lighting that used to be connected directly to the 12v


  • administrators

    How have you connected the lighting to the Duet? exp.heater5 is a 3.3V level control signal, not suitable for driving LEDs directly.



  • @dc42 thanks david, i totally forgot that it is 3.3v, i connect to exp.heater5 and gnd, that was my mistake. is there a pin on the expansion post to turn on the leds without the use of expansion?


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