Solved Octopus v1.1 configure 5v out on pin PD14

[MrMitnick]

Printer Model

Voron 2.4.r2 Rev.C LDO kit

Extruder Type

Clockwork 2

Cooling Type

Stealthburner

Hello everyone,

I am trying to hook up a PAM8403 audio amplifier to my Voron 2.4 with an Octopus v1.1 board. I have placed a jumper on PD14 to have it output 5V. When measuring the voltage i get no reading, so i figured the pin is software controlled and i need to configure something in my klipper.cfg. However i am unsure how i should configure that pin. Perhaps someone can help me out, or point me in a direction where i can find more info on how you can configure those pins?

This is what i have in my config now, but that obviously does not work as the amp is not PWM controlled, and currently i do not get a 5V reading of those pins.

[output_pin amplifier]
## PAM8403 - amplifier for audio
pin: PD14
pwm:true
shutdown_value: 0
value:0
cycle_time: 0.01

 

[MrMitnick]

I have changed it to this and this seems to work. But maybe someone has a better way of doing this.

#####################################################################
# Power Control Pins #PINO
#####################################################################

[output_pin amplifier]
## PAM8403 - amplifier for audio
pin: PD14
#pwm:true
shutdown_value: 0
value:1
#cycle_time: 0.01

 

[NoGuru]

If it works it works. My question is what are you doing with the Amp? Sounds interesting.

 

[MrMitnick]

If it works it works. My question is what are you doing with the Amp? Sounds interesting.

Sadly its not great at the moment, the speakers are giving a constant hum, they did not do that when using a buck converter. I just dont like the idea of mounting a buck converter to the underside.

When i was configuring load/unload macros i noticed some of them used M300 Beep. This got me thinking about adding some speakers to the printer. i had some old laptop speakers laying around and i bought a small PAM8403 amp of amazon. You can use text to speech to have the printer callout operations, or upload some .wav files such as a beep and alarm sounds.

You can see an example of my setup with the buck converter here -> https://streamable.com/q2vi44

I have reverted back to the buck converter and there is no hum now, looks like the 5v fan output on PD14 is not as clean as i had hoped.

 

[NoGuru]

LMAO, that's awesome! Yeah the buck has a filter on it, that is probably what's going on there so if you can add a filter inline with pin PD14 it "should" work.

Humm, I might want to do this mod now.

 

[MrMitnick]

Yeah, i was amazed that this was not done more.
Doesn't the Octopus allready have an elco onboard? im not that technical and i am afraid of messing up the board.

 

[MrMitnick]

LMAO, that's awesome! Yeah the buck has a filter on it, that is probably what's going on there so if you can add a filter inline with pin PD14 it "should" work.

Humm, I might want to do this mod now.

This is the Reddit thread that got me going -> Reddit thread.
I would go for the 2x6W Stereo Audio Amplifier Mini 5V PAM8406 Volume Control - With screw terminals -> Amazon link. That one cuts down on the soldering. If you can get it to work cleanely on a 5v output on the Octopus, be sure to let me know. Good luck!

 

[NoGuru]

The Octo Pro has a built in speaker. Ahh I never have enough time. Maybe I can test it tonight.

 

[MrMitnick]

That sucks for me, cause that means you can run it out of the box

 

[MrMitnick]

@NoGuru Did you manage to get it going, is your printer swearing at you yet?

 

[Neelix]

Are you running Klipper + OctoPrint? Because I installed a plugin there, which does exactly what you wanted, and I just needed to hook a small beeper to it. Basically just 2 cables.

 

[MrMitnick]

Are you running Klipper + OctoPrint? Because I installed a plugin there, which does exactly what you wanted, and I just needed to hook a small beeper to it. Basically just 2 cables.

i recently got rid of Octoprint as it was giving me problems. And i didnt really have a use for Octoprint.
I wonder if that beeper can play custom audio though? For instance the text to speech part in the Reddit thread linked above.

 

[NoGuru]

@NoGuru Did you manage to get it going, is your printer swearing at you yet?

I did test it with the built in speaker but its not the right kind so no go. I did order some of the actual speakers mentioned but no time to test yet. Working on a different project for a 100K acceleration printer.

 

[MrMitnick]

I did test it with the built in speaker but its not the right kind so no go. I did order some of the actual speakers mentioned but no time to test yet. Working on a different project for a 100K acceleration printer.

im guessing its just a beeper.
Good luck on the 100k build! sounds fast

 

[Billbr]

I just use a jq6500 module and just play preloaded phrases through the trigger io on the module. startup is mario saying "lets a-go.", end_print triggers cheering, etc. Default beep is a duck quack. The grandkids love it.