USB-C to DC barrel 12 Volt adapter tested.

FARSENSE USB C to DC Adapter,Barrel PD Trigger Cable(3.3ft) with 10 Connecor Tips,USB to DC Power Cable can Switch Voltage by Pressing The Key,Support LED Display Voltage : Electronics

Simple way to use USB Type-C to get 5V at up to 3A (15W) - Power - Electronic Component and Engineering Solution Forum - TechForum │ Digi-Key

How to Choose the Right 12V USB Adapter

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12V 5A USB-C 3.1 PD to 5.5mm Barrel Jack Cable - 1.2m with E-Mark

USB Type C Power Converter with 5V, 9V, 12V, 15V & 20V Power Delivery - PD60

USB C Multiport Adapter 4K HDMI - SD/PD - USB-C Multiport Adapters, Universal Laptop Docking Stations

Chargers & Adapters

Adapter AC Auto Volts 100-240V to 12V 1A DC black This adapter can plug in any power outlet from 110V to 240 Volts AC and provide you with Output of 12V DC

dc - Which end of a barrel connector is positive? - Electrical Engineering Stack Exchange

12V DC Barrel Adapter Accessories – CleanAirKits

USB Type C 3.1 PD to 5.5mm Barrel Jack Cable - 12V 5A Output [1.2m long with E-Mark] : ID 5450 : $7.95 : Adafruit Industries, Unique & fun DIY electronics and kits