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 Sparkfun products range from things like resistors and LEDs to humidity sensors and LCD screens.  Including: Books, Cables, Cellular, Components, Development Tools, E-Textiles, GPS, Kits, LCDs, Programmers, Prototyping, Sensor, Tools, Robotics, Wireless

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    DC Barrel Jack Adapter - Breadboard Compatible DC Barrel Jack Adapter - Breadboard Compatible DC Barrel Jack Adapter - Breadboard Compatible sku: PRT-10811  This DC power jack/connector is just like the other one that we carry except that it's terminated with breadboard-friendly pins instead of wide solder terminals. These are also compatible with our DC wall supplies and have a 5mm jack, with a 2.1mm center pole diameter. ... $0.95

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    9V to Barrel Jack Adapter 9V to Barrel Jack Adapter This simple cable has so many uses! Plug a 9V battery into one end 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! $2.95

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    DC Barrel Jack Adapter - Male DC Barrel Jack Adapter - Male 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. $2.95

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    Barrel Jack Adapter - USB to 5.5mm Barrel Jack Adapter - USB to 5.5mm 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 bu... $2.95

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    DC Barrel Jack - Panel Mount DC Barrel Jack - Panel Mount  DC Barrel Jack - Panel Mountsku: PRT-10785 This is a great DC power jack/connector for projects in an enclosure. This is a common barrel-type power jack for DC wall supplies, in a panel-mount form factor. These are compatible with our DC wall supplies and have a 5mm jack, with a 2.1mm center pole diameter. Simply drill the proper size hole in y... $3.37

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    DC Barrel Jack Adapter - Female DC Barrel Jack Adapter - Female DC Barrel Jack Adapter - Femalesku: 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. $2.95

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    Barrel Jack to 2-pin JST Barrel Jack to 2-pin JST 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. Thi... $2.95
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    ATX Connector Breakout Board ATX Connector Breakout Board This is a breakout board for our right-angle, 24-pin ATX connector. Pair this board with the ATX connector and a standard PC power supply and you'll have 3.3V, 5V, and ±12VDC to supply to your project. Make sure you ground the PS_ON pin to enable all of the outputs. All outputs of the power supply are broken out to an 8-p... $4.95

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    Barrel Jack Power Switch - M-F (3") Barrel Jack Power Switch - M-F (3")  Barrel Jack Power Switch - M-F (3") COM-11705 We use barrel jacks a lot around here and sometimes we need to pop a switch into the mix. That usually means hacking up a perfectly good barrel jack extension cable, but the whole point of using the barrel jacks was so that we wouldn't have to hack things apart... Well, we found a solution: The Barr... $2.50

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    DC/DC Converter Breakout DC/DC Converter Breakout DC/DC Converter Breakoutsku: BOB-09370This is a breakout board for our non-isolated, 6A DC-to-DC Converter Module. The module can convert any DC voltage between 4.5-14VDC to a selectable voltage between 0.59 and 5.5VDC.To set the output voltage to the desired level, a resistor must be added between the Trim and GND pins. For example, to set the ... $29.95

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    Car Adapter USB Power Supply - 5VDC 650mA Car Adapter USB Power Supply - 5VDC 650mA This is device that plugs into the 12-24V outlet in cars. It has a USB type A connector and can source 5V up to 650mA. This allows the user to charge or run a USB device in a car! We know - it's nothing too novel, but extremely handy if you've got a device that can charge over USB. The car adapter also works as a great 5V source to run man... $4.95
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    Car Adapter Power Supply--7.5VDC 3A Car Adapter Power Supply--7.5VDC 3A This adapter plugs into the 12-24V outlet in cars. It has a barrel plug connector that measures 5.5mm x 2.1mm, center positive. The output power is regulated and rated to 7.5VDVC and up to 3A. Cable length is 1m.Check out our Unregulated Power Supply Tutorial!Features: Works in cars or trucks with 12V to 24V input &#... $10.95
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    Switching Power Supply - 24V 500mA Switching Power Supply - 24V 500mA This is a nicely enclosed unit that takes an AC supply between 85V and 265V and steps it down to 24VDC at 500mA. Contains 5 screw terminal, two for AC input, two for DC output and one for a common ground. $13.85
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