SV08 4010/6010 mainboard fans

Inspired by Valerie's work. Not better, just using fans I have.

Stock 4010 for Host cooling and 6010 for the drivers.

Not intended to work with the stock covers (but may fit), my printer is well away from kids and kitty fingers. 

Host fan keeps the temp below 60c. Currently set to 30% speed which seems adequate with the machine at idle. The MCU fan provides plenty of additional flow during printing.
MCU fan runs when stepper drivers are active and remain on for 10 minutes after driver shutdown.

Also added a case fan wired with the MCU fan to promote airflow under the unit to help with PSU temps - Don't try and shift the printer while its running!! 

CFG mods: Or use Valerie's original code.

Edit: I bumped max_delta to 5.0 to stop the fan from running every 5 mins as it's idle temp was just over the 60c trigger point. Adjust temps to suit your needs and environment. A typical Raspberry Pi will happily run up to 80c before it starts to throttle performance to manage temps and can often idle around 50-60c.

Comment out existing lines:
#[temperature_sensor Host_temp]   
#sensor_type: temperature_host
#min_temp: 0
#max_temp: 110

Add this in the fans section:
[controller_fan MCU_Fan]
pin: PA1
stepper: stepper_z
fan_speed: 1.0
idle_timeout: 600

[temperature_fan Host_Fan] 
pin: PA2
sensor_type: temperature_host
control: watermark  # Not PID
max_power: 0.3   # Fan speed
kick_start_time: 0.5
shutdown_speed: 0.0  #Can be set to 1.0, fan will run at max speed if the controller enters an error state 
min_temp: 10
max_temp: 100
target_temp: 57
max_delta: 3.0   #  +/- 3c from target temp

Bonus led control code: Lights on when steppers or extruder are active and remain on for 5 mins after driver shutdown. Comment out existing led code
#[output_pin main_led]
#pin:PA3
#pwm: 1
#value:1
#cycle_time: 5

[controller_fan case_lights]
pin:PA3
heater: extruder
stepper: stepper_z
fan_speed: 1.0
idle_timeout: 300