All Products

SKU: LB-LR0296

A 9V battery clip adapter with a standard 5.5 × 2.1 mm centre-positive barrel jack. Use it to power any device that accepts 9V input through an onboard barrel jack connector. Key Features 9V Battery Snap – Standard clip fits all 9V batteries Barrel Jack Output – 5.5 × 2.1 mm centre-positive c...

SKU: DF-FIT0043

The second version of the 9V to Barrel Jack Adapter, now featuring a hard plastic battery snap for easier connection and disconnection. Plug a 9V battery into one end and connect the other to any device with a 5.5 × 2.1 mm centre-positive barrel jack. Key Features Hard Plastic Snap (V2) – Easi...

SKU: SF-PRT-09518

A simple 9V battery clip cable with a 5.5 × 2.1 mm centre-positive barrel jack on the other end. Plug it onto a standard 9V battery and connect directly to any device with an onboard barrel jack — perfect for powering an Arduino Uno or other development board from battery. Key Features 9V Batt...

SKU: DF-FIT0131

A simple 9V battery clip cable with a 5.5 × 2.1 mm centre-positive barrel jack. Plug a 9V battery into one end and connect the other to any device with an onboard barrel jack — ideal for powering Arduinos, development boards, and evaluation boards from battery. Key Features 9V Battery Snap – S...

SKU: DF-FIT0110

This adapter allows you to connect a barrel jack connector to bare wires. One end has screw terminals and the other has a 5.5x2.1mm, center-positive male barrel jack. If you need to connect bare wires to a barrel jack on an Arduino or a development board, this might be the simple solution. Wi...

SKU: PI-ADP010

A handy adapter that converts a 2.1 mm DC barrel jack (female socket) into a screw terminal block. Plug a wall adapter or barrel-plug cable into the jack end, and access the power lines via labelled +/− screw terminals on the other — no soldering required. Key Features 2.1 mm DC Barrel Jack – ...

SKU: PI-ADP011

A handy adapter that converts bare wire connections into a standard 2.1 mm DC barrel plug. Strip your battery pack or power supply wires, secure them in the screw terminals, and plug straight into any board or device with a 2.1 mm barrel jack input — no soldering required. Key Features 2.1 mm ...

SKU: AF-2788

A DC barrel jack adapter cable that converts a 3.5/1.3 mm or 3.8/1.1 mm DC plug to the standard 5.5/2.1 mm DC barrel jack format. Internal spring contacts accommodate outer diameters from 3.5 mm to 3.8 mm, making it versatile across a range of small-barrel DC connectors. Key Features Wide Comp...

SKU: AF-1329

Connect a battery pack or bare wires to any device with a 2.1 mm DC barrel jack input using this adapter cable. Colour-coded alligator clips (red for centre-positive, black for ring-negative) clip onto battery terminals or exposed wires, while the moulded 2.1 mm barrel plug feeds power straight i...

SKU: AF-4287

A push-fit DC barrel jack adapter that converts a 3.5/1.1 mm DC plug to the standard 5.5/2.1 mm DC barrel jack format. Simply push it onto the smaller plug until it clicks into place — no soldering or tools required. Key Features Click-Fit Connection – Push onto the plug until it clicks secure...

SKU: AF-2897

A simple adapter that sits inside a 5.5 / 2.5 mm DC barrel jack, allowing you to use a standard 5.5 / 2.1 mm barrel plug with it. Just insert the adapter into the device's 2.5 mm jack, then plug in your 2.1 mm power supply as normal. Key Features 2.5 mm to 2.1 mm Conversion – Adapts a 2.5 mm I...

SKU: AF-5474

A comprehensive set of 30 barrel jack plug adapters that convert a standard 5.5mm / 2.1mm DC jack to a wide variety of other tip sizes. Perfect for powering devices that use non-standard barrel connectors from your existing DC power supplies, USB-C to DC cables, or battery packs. Each adapter pl...

SKU: SF-TOL-08639

A USB-A to 5.5 × 2.1 mm barrel jack adapter cable for powering development boards and small devices from any USB port. Centre-positive polarity, delivering up to 5 V at 500 mA (per USB specification). Specifications Input – USB-A male plug Output – 5.5 × 2.1 mm barrel jack, centre positive V...

SKU: AF-1328

Turn any 2.1 mm barrel-jack wall adapter into a handy bench power supply with this adapter cable. The moulded DC barrel jack connects to your power supply, while colour-coded alligator clips (red for centre-positive, black for ring-negative) let you quickly clip onto bare wires, terminals, or tes...

SKU: DF-FIT0151

A screw-terminal adapter that converts a 5.5 × 2.1 mm centre-positive DC barrel jack connection to bare wire terminals. Plug in a barrel jack power supply on one end and connect the screw terminals to a breadboard, circuit, or project on the other — a simple way to add a standard DC power input w...

SKU: AF-2727

This adapter cable converts a 5.5mm/2.1mm DC barrel jack power supply to a Micro USB plug, allowing you to power Micro USB devices from a standard barrel jack power adapter. The barrel jack end is centre-positive polarity. It works great for powering Arduinos, BeagleBones, Raspberry Pis, Android...

SKU: AF-5449

A USB Type-C Power Delivery (PD) cable that converts any PD-capable USB-C power adapter into a 9V DC barrel jack output at up to 5A. The built-in PD sink negotiation chip communicates with your adapter to request 9V output, while an EMARK chip enables full 5A high-current delivery as required by ...

SKU: AF-411

A small adapter that converts a standard 5.5 / 2.1 mm DC barrel plug into a 4.0 / 1.7 mm plug, letting you use common 2.1 mm wall adapters with devices that have a smaller 1.7 mm DC jack input. Key Features 2.1 mm Jack Input – Accepts standard 5.5 / 2.1 mm barrel plugs 1.7 mm Plug Output – Fi...

SKU: SF-PRT-10287

This adapter allows you to connect a barrel jack connector to bare wires. One end has screw terminals and the other has a 5.5x2.1mm, center-positive male barrel jack. If you need to connect bare wires to a barrel jack on an Arduino or a development board, this might be the simple solution.

SKU: AF-3546

A passive adapter with a 1st-generation MagSafe plug on one end and a 5.5 mm / 2.1 mm DC barrel jack (centre-positive) on the other. It lets you connect a 15–20 VDC barrel-jack power supply to devices that use the original MagSafe connector — useful for bench testing, custom power setups, or repl...