# Install klipper-virtual-pins
```
bash
cd ~
git clone https://github.com/pedrolamas/klipper-virtual-pins.git
./klipper-virtual-pins/install.sh
```

# Add virtual pin to printer.cfg
```
[virtual_pins]

[output_pin fan_multiplier]
pin: virtual_pin:fan_multiplier
pwm: True
value: 1.0
```

# Configure M106 to use fan_multiplier
```
[gcode_macro M106]
rename_existing: M106.1
gcode:
  {% set S = params.S|default(0)|int %}
  {% set P = params.P|default(0)|int %}
  {% set MULTIPLIER = printer['output_pin fan_multiplier'].value %}
  {% set ADJUSTED_S = (S * MULTIPLIER)|round(0)|int %}
  M106.1 P{P} S{ADJUSTED_S}
```