I'm trying to control my ventilation with heat recovery unit, it needs a signal from 1 - 10 volt 10 volt == Low ventilation 5 volt == Middle ventilation 0 volt == High ventilation Normally i want low ventilation, when the recovery unit starts i will take that signal to set the arduino to 5 volts…

2 Button to 1 PWM output

killzone_kid October 1, 2021, 3:57pm 17

Both 3 and 1 on this diagram are permanently low regardless of button states

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