Adafruit
2.1mm 5VDC Barrel Jack to USB C Adapter
$11.34
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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....
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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
Warning: This adapter has no protection circuit and does not perform USB Power Delivery negotiation. Use only with a 5 V centre-positive barrel jack supply. Incorrect polarity or voltage may damage your connected device.
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
Jargon buster
Plain-language definitions for the technical terms used above.
- DC barrel jack
- A round power connector commonly used for low-voltage DC power supplies, often described by its outer and inner diameters such as 5.5 x 2.1 mm. Matching the barrel size and polarity is important so the plug physically fits and powers the device correctly.
- USB Power Delivery
- USB Power Delivery is a standard that lets devices negotiate higher power levels over a USB-C connection. For this carrier board, PD 60W support matters because the Jetson module and connected peripherals may need more power than basic USB can provide.
- USB-C
- A modern reversible USB connector used for power and data connections. On this product it matters because it can connect directly to a computer as well as to a microcontroller project.
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