This product is a 3-in-1 cable. By itself, it can act as an extension cord for any 5.5/2.1mm DC power cable. The heavy 24 AWG wires can handle up to 5A. You can also cut it half to make two barrel cables (one plug and one jack). This will allow you to connect a classic 'wall wart' to a breadboard or PCB without having to solder in a bulky power jack. Or you can use...

"Hrmph! All I have is a power supply with a 2.1mm plug and my doodly-whatsit has a 2.5mm jack. I keep trying to force the plug to fit but that 0.4mm difference just wont work....what am I going to do!?" ENTER The Adapter. This 2.1mm to 2.5mm adapter is the best way to adapt a 2.1mm plug so that it will fit into a 2.5mm jack. Remember that this will fit into a device...

This brilliant invention is a blessing for makers designing or using boards with standard 2.1mm DC barrel jacks. Many devices opt against a proper power switch, for size or cost or other design reasons. So, you're expected to unplug when not in use. But you want something a little fancier! This 2.1mm DC Power Jack with Rocker Switch has the same PCB layout as classic...

Turn a wall adapter into a mini power supply with this incredibly useful adapter. A high quality molded 2.1mm DC barrel jack is brought out to red (center positive) & black (ring negative) alligator clips. Works with just about every wall adapter, good for about 2 or 3 Amps of current and up to 24VDC. 2.1mm DC Barrel Jack to Alligator Clips (1:28)

Turn any battery pack into a power supply with this incredibly useful adapter. A high quality molded 2.1mm DC barrel plug is brought out to red (center positive) & black (ring negative) alligator clips. 2.1mm is a near-standard for electronics, so with this adapter you can easy clip and connect packs and wires to a power jack. Good for about 2 or 3 Amps of...

We're carrying this adapter primarily to allow Chumby Hacker Board users to adapt our nice 5V @ 2A power supply to their CHB. But you can use this adapter for anything else that has a 1.7mm DC jack, such as a PSP.

As technology changes and adapts, so does Adafruit, and speaking of adapting, this adapter has a 2.1mm barrel jack socket and a USB C plug - you could use this to power a USB C device from a common wall adapter. USB C is the latest industry-standard connector for transmitting data and power. Like Lightning and MagSafe cables, USB C has no up or down orientation. Plug...

This brilliant invention is a blessing for makers designing or using boards with standard 2.1mm DC barrel jacks. Many devices opt against a proper power switch, for size or cost or other design reasons. So, you're expected to unplug when not in use. But you want something a little fancier! This 2.1mm DC Power Jack with Slide Switch has the same PCB layout as classic...

If you've ever owned a 1st generation MacBook, you'll recognize this little friend. The premise of this 2.1mm DC Barrel Jack to 1st Generation MagSafe Adapter is simple. There's a MagSafe plug on one end and a 5.5mm/2.1mm DC barrel jack with center positive polarity on the other. This allows you to connect a 15-20VDC power supply to something that expects to connect...

If you own a MacBook, you'll recognize this little friend. The premise of this 2.1mm DC Barrel Jack to 2nd Generation MagSafe Adapter is simple. There's a MagSafe plug on one end and a 5.5mm/2.1mm DC barrel jack with center positive polarity on the other. This allows you to connect a 15-20VDC power supply to something that expects to connect to 2nd gen. MagSafe....

Double up your power adapters with this wonderfully simple 2-way power jack splitter. All you have to do is connect a standard 5.5mm/2.1mm sized plug into one end, and behold, two identical plugs to use! We like the rugged molding on these adapters, and they're really handy when you have a project with multiple pluggable devices. 2-Way 2.1mm DC Barrel Jack Splitter...

This power jack is designed to fit 2.1mm power plugs snugly and securely. Perfect for adding a power connector to your project. We went for the more expensive "thin pin" type which snap into breadboards or perfboards. They will work where "thick pin" types go also, just need a little more solder to fill up the larger pads.

Quadruple your power adapters with this wonderfully simple 4-way power jack splitter. All you have to do is connect a standard 5.5mm/2.1mm sized plug into one end, and behold, four identical plugs to use! We like the rugged molding on these adapters, and they're really handy when you have a project with multiple pluggable devices. 4-Way 2.1mm DC Barrel Jack Splitter...

There's two standard ways to power electronics - USB or 5.5mm/2.1mm DC barrel jack. This or that! With this USB to 2.1mm Male Barrel Jack Cable, you can now power 5V DC powered electronics that have a DC jack from a USB jack with a handy 1 meter long cable. Simply plug the USB A side to any computer, PowerBoost, USB wall adapter, or even a USB battery pack. Other...

This power jack is designed to easily attach to a panel up to 8mm thick (0.315" or 5/16") and fit 2.1mm power plugs snugly and securely. Perfect for adding a power connector to your project enclosure. We like this jack in particular for its long body (so you can use it on thicker wooden panels), sturdy PCB spacer with 3 easy-to-solder eyes and 'forgiving' plastic lip...

This cable is kinda fascinating - it has an integrated boost converter, so you can plug it into any USB port (from a computer, battery pack, etc) and it will give you a higher DC voltage! It's a handy way to power 9V powered devices with a center-positive 2.1mm DC barrel jack from a USB port. We also have a version that provides 12V, and if you just need a passthough...

DIY? How about D-I-Wire! This barrel jack plug is great for adding a common power connector to the end of your wires. The jack is compatible with 5.5mm barrel jacks that have a 2.1mm center pole diameter. The outer shell unscrews to reveal solder terminals and a crimp strain relief. Nifty, tidy, and practical.

Put your Snap! cassette on and sing along to "I got the power!" with this super useful power supply adapter where you can easily change the voltage with a snap of your fingers. On the front is a potentiometer knob and a LED 7-segment digital display. Twist the knob and look at the output voltage to range from 3 to 12V DC. It's kinda like a benchtop supply you can...

If you need to connect a DC power wall wart to a board that doesn't have a DC jack - this adapter will come in very handy! There is a 2.1mm DC jack on one end, and a screw terminal block on the other. The terminals are labeled with positive/negative assuming a positive-tip configuration (which is the most common)

If you need to connect a battery pack or wired power supply to a board that has a DC jack - this adapter will come in very handy! There is a 2.1mm DC plug on one end, and a screw terminal block on the other. The terminals are labeled with positive/negative assuming a positive-tip configuration (which is the most common)

Put your Snap! cassette on and sing along to "I got the power!" with this super useful power supply adapter where you can easily change the voltage with a snap of your fingers. On the front are a potentiometer knob and a LED 7-segment digital display. Twist the knob and look at the output voltage to range from 3V to 24V DC. It's kinda like a benchtop supply you can...

Add a power switch to any project simply by plugging this between the power supply. This is the most useful thing you never knew you needed! You'll want to pick up a bunch for your electronic projects. Comes with a 5.5/2.1mm barrel jack on one end an a plug on the other. In between is an in-line switch that is rated for 125V and 2Amps (its normally used for lamps, we...

This cable is kinda fascinating - it has an integrated boost converter, so you can plug it into any USB port (from a computer, battery pack, etc) and it will give you a higher DC voltage! It's a handy way to power 12V powered devices with a center-positive DC barrel jack from a USB port. We also have a version that provides 9V, and if you just need a passthough...

We have a lot of power adapter packs in the shop - from 9V to 12V to 5V we even have an adjustable power supply like one of these. But all of them will come with the same standard 5.5mm / 2.1mm DC barrel jack that is most common on many devices. What if you'd like to power something different, say some old synthesizer or a laptop or some other whats-it? Basically,...

This cable is kinda fascinating - it has an integrated boost converter, so you can plug it into any USB port (from a computer, battery pack, etc), and it will give you a higher DC voltage! It's a handy way to power a 9V or 12V device. Unlike our other 'USB booster' cables, this one comes with a fancy lil display and a switch so you can select between 9V or 12V output...

The premise of this MicroUSB to 5.5/2.1mm DC Barrel Jack Adapter is simple. There's a MicroUSB plug on one end and a 5.5mm/2.1mm DC barrel jack with center positive polarity on the other. This allows you to connect one of our 5V 2 Amp, 5V 4A or 5V 10 Amp adapters to something that expects to connect to 5V USB. We also have a cable-version of this, but this one is...

If you need to add a panel-mount connection for DC power, but don't have the time or ability to cut a custom oval or square hole, this Round Panel Mount 5.5mm/2.1mm DC Barrel Jack Extension Cable is the easiest and fastest way to panel-ify your existing project. The outer flange is 30mm in diameter, and the threaded part is 23mm diameter, so you can drill a 1" hole...

Here's another addition to our growing family of AA battery holders. A holder for four (4) AA batteries! It's got an 8" long power cable with a 2.1mm DC jack at the end, and, oh yes, it's in classy Adafruit black. 4 x AA battery packs are best used with development boards with 2.1mm DC jacks and can run with ~4.8V (4 x NiMH) to ~6V (4 x Alkaline). Great for powering...

Here's another addition to our growing family of AA battery holders. Behold! A holder for four (4) AA batteries! It's got a 5" long power cable with a 5.5/2.1mm DC jack at the end, an On/Off switch, and, oh yes, it's in classy Adafruit black. 4 x AA battery packs are best used with development boards with 2.1mm DC jacks and are happy with ~4.8V (4 x NiMH) to 6V (4 x...

Here's another addition to our growing family of AA battery holders. A holder for three (3) AA batteries! It's got an 8" long power cable with a 2.1mm DC jack at the end, and, oh yes, it's in classy Adafruit black. This battery holder connects 3 AA batteries together for powering all kinds of projects. Three AA's add up to about 3.6-4.5V, a very similar range to...

Here's yet another addition to our family of AA battery holders. It's a holder for five (5) AA batteries, with 5" wire leads. It's black and has a 2.1mm barrel plug (tip positive). 5 x AA battery packs are best used with Arduino-compatibles and other dev boards with 2.1mm DC jacks and a 5V regulator, because 5V regulators tend to like 1-2V of overhead. 4 x AA battery...

The premise of this MicroUSB Plug to 5.5/2.1mm Jack adapter is simple. There's a MicroUSB plug on one end and a 5.5mm/2.1mm DC barrel jack with center positive polarity on the other. This allows you to connect one of our 5V 2 Amp, 5V 4A or 5V 10 Amp adapters to something that expects to connect to 5V USB. We also have a shorty adapter-without-cable version Since this...

I found these high-quality battery clips. They're molded plastic so they won't tear like cheap clips, and they cover the battery terminals to prevent shorts. Comes with a 5.5mm/2.1mm center-positive barrel connector, assembled! Battery not included.

This little dongle will let you connect one of our 5V 2Amp or 5V 10Amp adapters to something that expects to connect to USB. The premise is simple - one end has a USB A female jack and the other has a 'standard' 5.5mm OD/2.1mm ID barrel jack with center positive polarity. It does not have any resistors or other connections inside for the data lines so this won't work...

Outdoor enthusiasts rejoice! We now have standard 5.5/2.1mm DC power cable sets in a waterproof variety. These cable sets are ideal for projects that must weather the weather: dust, water, rain, snow, tornado (not volcano proof!). They are a little bulkier than normal DC jacks because of the o-ring and removable over-screw. The o-ring is what makes the waterproof...

This is a 9V battery pack with on/off switch and a pre-attached 5.5mm/2.1mm center-positive barrel plug. Use this to battery-power your Arduino (or other electronic projects) - it's ready to go out of the box! Battery & screw not included.

Make a portable power brick with plenty of juice! Use Alkaline AA's for a 12V 3000-4000mAh power supply, or rechargeable NiMH for 2000mAh 9.6V supply. Either one is good for running electronics that have a 5V voltage regulator (thus requiring a 7V+ supply) or perhaps some motors or solenoids. Perfect for portable Arduinos, motors, solenoids, 12V LED strips, etc. An...

Make a portable power brick with plenty of juice! Use Alkaline AA's for a 9V 3000-4000mAh power supply, or rechargeable NiMH for 2000mAh 7.5V supply. Either one is good for running electronics that have a 5V voltage regulator (thus requiring a 7V+ supply). Will last about 10 times longer than a 9V Plug is 5.5mm outer diameter, 2.1mm inner diameter, center positive....

This convenient 3.5mm/1.1mm or 5.5mm/2.1mm DC Jack adapter lets you plug one of our solar panels into our optimized Solar Lithium Ion/Polymer charger! 2.1mm inner diameter (5.5mm outer diameter) is the most common type of DC plug, but you can use this adapter for anything else that has a 1.1mm ID (3.5 OD) DC jack. This adapter lets you convert something with a 3.5mm...

This convenient 3.8mm/1.3mm or 3.5mm/1.1mm or 1.3mm DC to 2.1mm DC adapter cable lets you plug one of our solar panels into our optimized Solar Lithium Ion/Polymer charger! 2.1mm inner diameter (5.5mm outer diameter) is the most common type of DC plug, but you can use this adapter for anything else that has a 1.1 or 1.3mm ID (3.5-3.8mm OD) DC jack! The adapter has...

This is an FCC/CE certified and UL listed power supply. Need a lot of 5V power? This switching supply gives a clean regulated 5V output at up to 2000mA. 110 or 240 input, so it works in any country. The plugs are "US 2-prong" style so you may need a plug adapter, but you can pick one up at any hardware store for $1 or so. This cable terminates with a 'standard' 5.5mm...

This is a beefy switching supply, for when you need a lot of power! It can supply 5V DC up to 10 Amps, running from 110V or 220V power (the plug it comes with is for US/Canada/Japan but you can use any plug adapter for your country, or just replace the cable with a standard computer/appliance power cord) The output connects to a 2.1mm DC plug. There's a green LED...

Need a lot of 5V power? This switching supply gives a clean regulated 5V output at up to 4 Amps (4000mA). 110 or 240 input, so it works in any country. The plugs are "US 2-prong" style so you may need a plug adapter, but you can pick one up at any hardware store for $1 or so, or you can buy a 'figure-8' cable for your country, also available at any electronics or...

Wow, is this not the most useful thing you did not know existed or what? It's a switching wall adapter where you can easily change the voltage! It's like a benchtop supply you can take with you anywhere. This model is 10 Watts and has 6 selectable outputs ranging from 3V to 12VDC and up to 1.5A output. It has a 2-prong plug but takes 110VAC to 240VAC so you can use...

We now have a newer, easier, and cheaper design for solar charging - check out the bq24074-based Adafruit Universal USB / DC / Solar Lithium Ion/Polymer charger! It has more input protection and wider voltage range, no need for a large capacitor, USB C, and more. We'll continue stocking this older design for folks who need it. For new Solar charging projects, please...

Wanna improve the connection strength between your project's 3D-printed parts, and also have nice clean surfaces? Instead of gluing bits together, or screwing plastic screws directly into your 3D prints, use strong and reusable machine screws and heat-set inserts. Heat set inserts are only a few cents a piece and have a grooved outside, with threads on the inside....

This is a beefy switching supply, for when you need a lot of power! It can supply 12V DC up to 5 Amps, running from 110V or 220V power (the plug it comes with is for US/Canada/Japan but you can use any plug adapter for your country, or just replace the cable with a standard 'figure-8' cable). The output connects to a 2.1mm DC plug. There's a green indicator light to...

Yes, this is a beautiful bright 10.1" TFT display with incredibly high resolution and great angle-visibility! We tried to get the thinnest, brightest, highest resolution display that would be good for embedded computing usage. The visible display measures 10" diagonal and is a 'raw' display as is used in a tablet, ultra thin with some mounting tabs around the edge....

The Raspberry Pi Build HAT (Hardware Attached on Top) is a new add-on board for your Raspberry Pi. It connects to the 40-pin GPIO header and can be used to control up to four LEGO Technic motors and sensors from the LEGO Education SPIKE Portfolio. The cool design of the Build HAT means that all the components are on the bottom, leaving room on the top of the board...

I know you just did a double-take when looking at this power supply, what's up with the two cables? Normally you have a switching power supply that plugs into the wall and provides something like 5V or 9V or 12V regulated DC. This split power supply is interesting in that it gives you two power supplies! One is a positive-with-respect-to-ground +12VDC. The other is...

Adding shortening to a Pi makes it fatter - but this kind of shortening makes your Pi a little slimmer! This short-style, pink microSD adapter slides in where the SD card goes but is 9mm shorter. This makes it stick out a lot less and makes for a more elegant (and less accident-prone) Pi. All you have to do is pop in a microSD card for a sleeker machine! The outer...

Put on your sunglasses before wiring up this LED matrix - 64 eye-blistering RGB LEDs adorn the Adafruit DotStar Matrix for a blast of configurable color. Arranged in an 8x8 matrix, each pixel is individually addressable. Only one microcontroller pin is required to control all the LEDs, and you get 24 bit color for each LED. With 64 LEDs, you can have up to 4A of...

This little desktop fan is simple but super handy. It's a ~12VDC fan in a nice enclosure, you can sit it on your desk and power it off of any 9V or 12VDC power supply (even a USB booster cable if you want). We've used this fan pointing out to cool off hot projects or PCBs after reworking, or turn it around to make it an exhaust fan during soldering. It has a magnet...

Adding shortening to a Pi makes it fatter - but this kind of shortening makes your Pi a little slimmer! This black short-style microSD adapter slides in where the SD card goes but is 9mm shorter. This makes it stick out a lot less and makes for a more elegant (and less accident-prone) Pi. All you have to do is pop in a microSD card for a sleeker machine! The outer...

Adding shortening to a Pi makes it fatter - but this kind of shortening makes your Pi a little slimmer! This short-style blue microSD adapter slides in where the SD card goes but is 9mm shorter. This makes it stick out a lot less and makes for a more elegant (and less accident-prone) Pi. All you have to do is pop in a microSD card for a sleeker machine! The outer...

As electronics get smaller and smaller, you'll need a hand examining PCBs and this little TV-output microscope is the perfect tool. It's smaller and lighter than a large optical microscope but packs quite a bit of power in its little body. There's a 1.3 megapixel sensor inside and an optical magnifier that can adjust to about 25x (for basic PCB inspection) or 400x...

Includes! Adafruit data logger shield for Arduino. 8 GB SD card. Photocell. Through-Hole Resistors - 10K ohm 5% 1/4W - Pack of 25. Temperature sensor (-40 degC to 125 degC). 6 x AA battery holder with 2.1mm jack (unassembled). You'll need 6 AA batteries, a CR1220 coin cell, some wire and soldering tools to assemble the project. For more information, including...

Charge your single-cell lithium ion/polymer battery any which way you like with this board. Have a USB connection? No problem, just plug into the miniUSB connector. Only have a wall adapter? Any standard 2.1mm DC adapter which puts out 5 to 12VDC will work fine. If both are plugged in, the charger will automatically choose whichever has the highest voltage. Other...