A simple adapter that converts a standard 2.1 mm DC barrel jack into a USB-C plug, letting you power USB-C devices from common 5 V barrel-jack wall adapters. Plug it onto the end of your existing power supply and connect straight to a Raspberry Pi 4 or any USB-C device that runs on 5 V without USB Power Delivery negotiation.

Key Features

• 2.1 mm Barrel Jack Socket – Accepts standard centre-positive 5 V DC plugs
• USB-C Plug Output – Reversible connector, no orientation to worry about
• Compact & Passive – No active electronics; straight-through power connection

Ideal For

• Powering a Raspberry Pi 4 from an existing 5 V barrel-jack supply
• Repurposing 2.1 mm wall adapters for USB-C devices
• Bench setups where barrel-jack supplies are already in use

Package Contents

• 1× 2.1 mm Barrel Jack to USB-C Adapter