Onboard 5V Fan Interface

Onboard 5V Fan Wiring

• The Gemini V3 has an onboard controllable 5V interface, used for main controller cooling. The wiring method is shown in the figure below.

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Reference Configuration

[mcu host]                      # FlyOS has already generated the Linux MCU for you by default; just define it to use
serial: /tmp/klipper_host_mcu

[temperature_sensor Gemini-V3]   # Host computer temperature
sensor_type: temperature_host


[temperature_fan core_fan]      # Host computer cooling fan
pin: host:gpiochip0/gpio3       # Host computer fan pin
max_power: 1.0
sensor_type: temperature_host   # Set to host computer main controller temperature
control:watermark               # Control method
target_temp: 48                 # Host computer cooling fan startup temperature
min_temp: 0                     # Minimum temperature; an error will be reported below this temperature
max_temp: 90                    # Maximum temperature; an error will be reported above this temperature
off_below: 0.10
kick_start_time: 0.50
max_speed: 0.8                  # Maximum speed, operating at 80% of full power
min_speed: 0.3                  # Minimum speed, operating at 30% of full power