What Power Does the NUC-CEC Use?

Modified on Thu, 30 Apr at 10:59 PM

The Intel NUC HDMI-CEC Adapter draws its power from the NUC motherboard header. It requires standby 5V — it will not operate on standby 3.3V.

Power Requirement

The NUC-CEC adapter must be connected to a pin supplying standby 5V (5Vsby) on the NUC's internal header. Connecting it to a 3.3V standby pin will result in the adapter not functioning — CEC commands will not be sent or received, and the adapter will not be detectable by libcec.

Do not use the standby 3.3V pin. The adapter requires 5Vsby to operate. Using the wrong voltage will prevent the adapter from working and may cause it to appear as though the hardware or software is faulty.

Identifying the Correct Pin

The correct pin to use depends on which generation of NUC you have and which cable harness was supplied with your adapter. Refer to the cable harness guide for your NUC generation for a pinout diagram showing which pin provides 5Vsby:

The NUC-CEC adapter is legacy hardware. Intel discontinued the NUC product line in 2023 and no new NUC-specific adapters are being developed. For new installations, the USB-CEC Adapter is the current recommended product.

Need help with your NUC-CEC adapter?
Contact Pulse-Eight support with your NUC model number and the cable harness generation you are using.

UK: 01202 413 610 | US: (858) 748-8250 | support@pulse-eight.com

What Power Does the NUC-CEC Use?

Power Requirement

Identifying the Correct Pin

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