Roto Tool Board 24V fan multiplex options
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This might be a silly question derived from lack of sleep, But is it possible to connect 2 fans to the OUT1 header, one fan would be an always on, the other a controllable cooling fan.
The always on fan would be connected to V_IN and GND, and the controllable fan connected to PWM_V_IN and GND
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@Notepad I'm not sure what the current limit of the pins and connectors are (probably 1A), but assuming you're not using massive fans, yes, I think that would be okay. Except that the controllable fan would go from V_IN to the out1 pin, as the out1 pin is PWM-to-GND.
Ian
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Thanks for the update of V_IN to PWM-GND.
The fans are not too large, only 1 oversized 6015 always on fan which is being used as a heatsink fan and the extra size allows for bypass air to be used to cool the TB and extruder motor.
And 1 4020 fan as a part cooling fan, as the 5V 4020's are frankly terrible
