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noctis

Use EXP3 pinout / 6 PWM

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Hey folks

I want to use the EXP3 (PWM) pins to control an Ikea Dioder RGB LED bar, but don't know if I can do so.

The pins.h from github/ErikZalm are already used for:

 


#define HEATER_BED_PIN 4
#define TEMP_BED_PIN 10
#define HEATER_0_PIN 2
#define TEMP_0_PIN 8 //Is this Pin A8 or just 8???
#define HEATER_1_PIN 3
#define TEMP_1_PIN 9 //so why is this Pin used, when the PCB Wiki tells me its on EXP3?
#define HEATER_2_PIN -1
#define TEMP_2_PIN -1 //What does -1 mean?
#define E0_STEP_PIN 43
#define E0_DIR_PIN 45
#define E0_ENABLE_PIN 41
#define E1_STEP_PIN 49
#define E1_DIR_PIN 47
#define E1_ENABLE_PIN 48
#define SDPOWER -1
#define SDSS 53
#define LED_PIN 13
#define FAN_PIN 7
#define PS_ON_PIN 12

I'm trying to attach the IKEA RGB Dioder LED bars to Marlin. I've already solderd a Darlington array with an step-down board and tested it with my 2nd Mega.

It's working with pin 8-13 - so far so good.

Also the custom G-Code M250 (all off) M251, M252 (on) are working with Marlin.

But as told, I need 6 channels.

Can someone show me a solution to get 6 PWM outputs or one Tx (with arduino micro)? I'm totally stucked in code.

Thanks a lot!

Greetings, Noc

 

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Any luck with this? Even just 3 PWM outputs would be okay I think, and just use the controller that came with the unit as a base, like this

Looking at pins.h it looks like only pin 11 is free is you're using 2 extruders and a heated bed though, so this might not be possible. Maybe the LED_PIN (13) could be used but I'm really not good with this kind of stuff

 

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Thanks for clearing that up.

This is going to make me sound like a noob but I figured I should ask before I let the smoke out on something.

So according to this diagram here: http://arduino.cc/en/uploads/Hacking/PinMap2560big.png

EXP3 on the UM PCB (1.5.7) would be digital pins 8-13, AKA actual pins (according to the diagram) 17, 18, 23, 24, 25, and 26?

And all of these are free to use as I/O? I plan on using the M42 command to play with these, would I use "M42 P13 Sxxx" or "M42 P26 Sxxx" to address the LEDPIN?

I am quite new to arduino/electronics in general if you couldn't tell, sorry to ask a million questions.

 

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Alright, so I've sort of got this working, but it acts funny.

R, G, B channels hooked up to pins 8, 9 , and 10 respectively on EXP3. Setting all to 255 ("M42 P8 S255", "M42 P9 S255" ...) gives me white as expected. Setting to 255, 0, 0 gives me orange when I expect red, and setting to 0, 0, 0 gives me green which I expected to have the lights turn off. Green is the default, ie. that's whats on before giving any commands after plugging the printer in. I also got this green effect running the controller off a standalone arduino. Any ideas what's going on?

Working on a Cura plugin now, but I would like be able to fade these LED's through all their colors. I'd imagine I'd have to put this in Marlin somewhere to avoid a never ending G-Code? Might as well try and add a menu for the LCD controller while I'm in there. I don't know Python or Arduino very well so this will be a process.

Here's some pics, basically hacked up the controller just like that video a couple posts up.

LED controller

LED controller

 

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