Dual Channel Wind Simulator

🌬️ DUAL Channel Wind Function using PWM Fan

Overview

The Motion4Sim Controller supports the connection of 2 PWM-controlled 12 V fan to simulate wind effects. The PWM signal is output through 2 Connectors. Check the connectors here:

Board Overview/Connectors

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⚙️ Requirements

• Motion4Sim Controller from pcb 3.xx

• older pcb 2.03 support single channel wind with external power from Firmware ≥ v4.30

• Basic Boards support 1 Wind Channel

• Pro License (required to unlock the 2nd Wind Channel)

• 4-Pin PWM Fan (standard PC fan following the Intel PWM spec)

• 12 V power supply connected to the m4s board at least max 2A

• Fans up to 7Watt power draw supported

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🔌 Connector ´s

Most PWM fans are equipped with Molex connectors. These connectors typically feature a double locking mechanism and two guide rails.

The Motion4SIM controller, however, uses KF04525 connectors, which are not fully compatible with the standard Molex design. As a result, the center guide tab on the fan connector must be carefully trimmed off with a knife to ensure proper fitment.

⚠️ Warning: Please exercise caution when modifying the connector. Use an appropriate cutting tool and take care to avoid injury.

🔌 Fan Pin Layout

A 4-pin PWM fan typically uses the following pinout:

Pin	Wire Color	Function	Connection
1	Black	GND	Connect to both the 12 V PSU ground and controller GND
2	Yellow	+12 V	Connect to the +12 V output of your power supply
3	Green	Tach (optional)	Not required
4	Blue	PWM Signal	Connect to Extra02 (PWM output from controller)

⚡ PWM Signal Details

• PWM frequency: ≈ 25 kHz (standard for 4-pin fans)

• Logic level: 3.3 V (controller output, compatible with 5 V fan logic)

• High logic ≥ 2 V, Low logic < 0.8 V

• 100 % duty cycle = maximum fan speed

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💻 Configuration in Dashboard App

1. Open the Dashboard App or Controller Setup Menu

2. Select Pin Extra02

3. Set the function to Wind – Channel 8 (Setup Tab)

4. Save the configuration

5. The controller now outputs PWM data to the fan whenever data is received on Channel 8 (Wind)

6. -> 2nd Wind channel is copy of 1. needs fw restructure coming next

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🧩 Data Format

Direct Mode: 0x00 → 0 % PWM (fan off) 0xFFFFFF → 100 % PWM (full speed) (24-bit values)

Direct Motion Mode

Position Mode:

0x00 → 0 % PWM 0xFFFFFFFF → 100 % PWM (32-bit values)

Position Motion Mode

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🧰 Wiring Example (schematic)

(USB 5 V from PC)             (12 V Power Supply)
+-------------------+       +------------------+
| Motion4Sim Board  |       |     12 V PSU     |
|                   |       |                  |
|   Extra02 (PWM) --+------> PWM (Pin 4, Blue) |
|   GND ------------+-------+ GND (Pin 1)      |
|                   |       | +12 V (Pin 2) ---+--> Fan
+-------------------+       +------------------+

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