3 fans on tool board 1lc?

gloomyandy

@gnydick You can't normally connect io0.out directly to a fan. But if any of the fans are 4 wire you may be able to control the speed with the logic level output, you would need to check the voltage required by the fan on the pwm input and the current it might draw. That's assuming you are not already using io0.out for something like a bl-touch. You may be able to use io0.in as a logic level output (again assuming it is not already being used), but I'm not sure if it is pwm capable or if there is any risk to the board if you do that.

gnydick

@gloomyandy, yep, I'm using IO0 for filament sensor/eject button

gloomyandy

@gnydick are you using both io0.in and io0.out?

gloomyandy

@gnydick What version of the 1lc do you have?

gnydick

@gloomyandy yes, using all of the pins. The latest version.

gloomyandy

@gnydick Assuming it is a rev 1.3 board (possibly also on 1.2), there is an unpopulated pad for IO_3.in which you may be able to solder a wire to. I'm not sure if this can be used as an output though at least for pwm output, if not you may be able to shuffle some of the pins you are already using around and use io_3.in for an input. Other than that I think you are out of luck.

dc42

@gnydick said in 3 fans on tool board 1lc?:

@gloomyandy yes, using all of the pins. The latest version.

Including io0.out ? You said you were using IO0 for the filament sensor eject button, but I would have thought you only needed to use io0.in for that.

gnydick

@dc42 2 switches, filament out sense, and eject button the specs are here, https://www.orbiterprojects.com/orbiter-filament-sensor/

dc42

@gnydick you could free up IO0.OUT by using one of the buttons on the tool board for filament unload instead of the one on the filament monitor; or you could connect the filament monitor button to the IO3_IN pads instead.

gnydick

@dc42 very true, very true.