Power Wiring Instructions
IMPORTANT WARNING
- All wiring operations must be performed with the power OFF.
- Carefully check the positive and negative poles before wiring. Incorrect connection may cause device burnout.
Host Computer Power Supply
STRICTLY PROHIBITED: Using the Mainboard's 5V to Power the Host
The host computer (e.g., Raspberry Pi, FLY-π, etc.) must not be powered by the 5V output from the mainboard. The mainboard's 5V output current is limited and cannot meet the power requirements of the host. Forcing its use may lead to:
- Insufficient power for the host, causing system instability or frequent reboots.
- Overloading of the mainboard's 5V circuit, potentially burning out the mainboard or the host.
Recommended Power Supply Methods
| Power Supply Method | Description | Recommendation Level |
|---|---|---|
| Independent 5V Power Adapter | Use a separate 5V/3A or higher power adapter to directly power the host. | ⭐ Most Recommended |
| Fan Port 24V to 5V Conversion | Utilize the 24V output from the mainboard's fan port, converting it to 5V via a DC-DC step-down module. | ✅ Optional Solution |
Independent Power Adapter Supply
Directly power the host via USB or GPIO using a 5V power adapter that meets specifications. This is the most stable and reliable method.
Requirements:
- Output Voltage: 5V
- Output Current: ≥ 3A (Recommended)
- Interface must match the host's power input (USB-C / Micro USB / GPIO)
Fan Port 24V to 5V Conversion Supply
If a separate 5V power source is unavailable, you can use the 24V output from the mainboard's fan port, converting it to 5V via a DC-DC step-down module to power the host.
Required Materials:
- DC-DC Step-Down Module (24V to 5V, Output Current ≥ 3A)
Wiring Method:
- Connect the input terminals (VIN+/VIN-) of the step-down module to the 24V and GND of the mainboard's fan port.
- Adjust or confirm the step-down module's output is 5V.
- Connect the output terminals (VOUT+/VOUT-) of the step-down module to the power supply pins of the host.
Precautions
- Before use, confirm with a multimeter that the step-down module's output voltage is 5V. The error should not exceed ±0.25V.
- Ensure the step-down module's rated output current is ≥ 3A.
- Pay attention to the positive and negative poles during wiring. Incorrect connection will burn out the host.
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