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9V to Barrel Jack Adapter
Price: $5.32
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Availability: Stocked
Sparkfun Item #: PRT-09518 -

This simple cable has so many uses! Plug the 9 volt battery clip onto a standard 9V battery and connect the other end to anything with a 5.5x2.1mm, center-positive barrel jack. Use this cable to battery-power any device that needs 9V and has an on-board barrel jack - it works great for Arduinos, development boards, evaluation boards, and more! ...

Barrel Jack Adapter - USB to 5.5mm
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Price: $5.42
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Sparkfun Item #: TOL-08639 -

This is a simple cable that adapts from a USB port to a 5.5x2.1mm barrel connector, center positive. This cable allows the user to use a USB port on a computer, laptop, or on our cigarette power supply to provide our development boards with 5V. The USB specification limits current consumption to a max of 500mA from a USB port but this is more than enough to run a simple development board. Cable length is 3 feet.

Barrel Jack to 2-pin JST
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Price: $5.00
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Sparkfun Item #: TOL-08734 -

Two pin JST connector to a 2.1x 5.5mm barrel jack, 6.25 inch long jumper cable. We use this cable to adapt from a wall power supply to a relatively small, SMD JST connector. We found that many of the SMD connectors used for battery charging were too large or were not capable of through-putting the current we wanted for faster charging. This setup, with a SMD JST connector and wall power supply, can handle up to 2A!

DC Barrel Jack Adapter - Female
Price: $5.23
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Sparkfun Item #: PRT-10288 -

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 female barrel jack. If you have a power supply with a barrel jack and want to plug it into a breadboard, this might be the simple solution. Please be aware that the max current for this adapter is 10A.

DC Barrel Jack Adapter - Male
Price: $5.23
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Sparkfun Item #: 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. Please be aware that the max current for this adapter is 10A.

PowerPal Selectable Voltage 3-Amp Breadboard Power Supply
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Price: $49.72
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Sparkfun Item #: DEV-15868 -

The PowerPal is a breadboard-friendly 3A power supply module that allows you to select from four different output voltage levels. It’s ideal for regulating power to breadboard based projects along with a battery pack or wall-mount supply. It comes with two sturdy 2x2 headers which plug directly into the breadboard rail. Through-hole pads are provided that allow the user to optionally add an additional VOUT header or on-off switch leads. Features: Rotary switch for user-selectable voltage...

USB Car Charger - 5V, 2.4A
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Price: $6.25
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Availability: Back Order
Sparkfun Item #: TOL-16886 -

Have you ever needed to power a project while in your car? Now you can without having to drag a computer along with this cost effective 5V, 2.4A USB car charger. These car chargers have a standard USB 'A' connector for the output so you can power your Arduino, Raspberry Pi, etc. through a USB cable. Any device that uses a USB cable for charging or power can be powered with this charger. Features: 2.4A dual USB Output Car Charger with Smart IC Autodetect with intelligent chip inside Material:...