Frequently Asked Questions
Mon-Fri, 9am to 12pm and
1pm to 5pm U.S. Mountain Time:
Chat With Us
images are CC BY-NC-SA 3.0
added to your
Description: DC power jack/connector. This is a common barrel-type power jack for DC wall supplies. These are compatible with our DC wall supplies and have a 5.5mm jack, with a 2.1mm center pole diameter.
Added to your cart!
High quality switching 'wall wart' AC to DC 9V 650mA wall power supply manufactured specifically for Spark Fun Electronics. T…
This simple cable has so many uses! Plug the 9 volt battery clip onto a standard 9V battery and connect the other end to anyt…
Here is a very simple breadboard power supply kit that takes power from a DC wall wart and outputs a selectable 5V or 3.3V re…
This is a high quality AC to DC 'wall wart' which produces a regulated output of 12VDC at up to 600mA. These are switch mode …
This DC power jack/connector is just like the other one that we carry except that it's terminated with breadboard-friendly pi…
This is a simple 4 cell AA battery holder. The 5 inch cable is terminated with a standard 5.5x2.1mm, center positive barrel j…
This is a simple SPDT slide switch - great for use as an ON/OFF button, or just as a general control switch. The pins are spa…
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 per…
This barrel jack plug is great for adding a common connector to the end of our wires. This jack is compatible with 5.5mm barr…
Behold, the Hydra! This USB power cable probably looks a lot like something you've hacked together before. We do it all the t…
This is a simple, very common rectifier diode. Often used for reverse voltage protection, the 1N4001 is a staple for many pow…
This female barrel jack plug is great for adding a common connector to the end of wires. This jack is compatible with 5.5x2.1…
Do you fear that your power may not be "far reaching" enough? How would another 6' work for you? Okay, so it doesn't sound ve…
This is a common SMD barrel-type power jack for DC wall supplies. These are compatible with our DC wall supplies and have a 5…
Do you fear that your power may not be "far reaching" enough? How would another 3' work for you? Okay, so it doesn't sound ve…
It's blue! It's thin! It's the Arduino Pro Mini! SparkFun's minimal design approach to Arduino. This is a 5V Arduino running …
A row of headers - break to fit. 40 pins that can be cut to any size. Used with custom PCBs or general custom headers.
Resistors are a good thing, in fact, they're actually crucial in a lot of circuit designs. The only problem seems to be that …
This is the new Arduino Uno R3. In addition to all the features of the previous board, the Uno now uses an ATmega16U2 instead…
Single row of 40-holes, female header. Can be cut to size with a pair of wire-cutters. Standard .1" spacing. We use them exte…
It's blue! It's thin! It's the Arduino Pro Mini! SparkFun's minimal design approach to Arduino. This is a 3.3V Arduino runnin…
This is a high quality switching 'wall wart' AC to DC 5V 2000mA Barrel Jack wall power supply manufactured specifically for S…
This is the basic L7805 voltage regulator, a three-terminal positive regulator with a 5V fixed output voltage. This fixed reg…
This is the newest revision of our [FTDI Basic](http://www.sparkfun.com/commerce/product_info.php?products_id=8772). We now u…
New design? As of the end of 2013, you want product 10811 instead.
By the datasheets product 10811 withstands higher voltages and currents, and by the product description it has the additional capability to be used on a breadboard prototype before you solder it all down. As annoying as it may be to post a product discouragement here, this here is a distracting product: it does less of the same thing as 10811 at a higher cost. The newer product (this one is 119 - from much earlier in Sparkfun’s history) appears significantly better.
I’m pretty happy that Sparkfun chose to add the better one when they found it. Thanks! Now, retire this one, so we don’t have the Mouser/Digikey/Farnell/etc “How many datasheets do I have to read to pick a jack/resistor/LED/bananaphone/transistor/wire?” problem. That’s a yak I don’t want to shave.
But! - If you already have a pcb, and it need this footprint, then this would still be the right one.
If I missed any other reasons why you’d prefer this over the other one, please correct me! People buying the wrong product for what they need is sad. : (
If you need RoHS compliance, the breadboard friendly version doesn’t seem to cut it. For most of us, this isn’t an issue, however it’s something to keep in mind.
If using this with a standard center-positive 5.5x2.1mm barrel connector: The leg in the center of the plastic body is the positive lead, while the other two (on the outer edges of the plastic body) are both connected to one another and are the negative leads.
Huh? The V+ is the Rear leg (not the center leg). This will matter if doing a PCB. The center and side leg are normally tied together to GND.
so can we clear this once and for all–which pins stand for what? the datasheet is complete crap imo
The back leg is the center pole.
The leg in the middle of the connector is tied to the outer barrel.
The leg on the side is a switch. It is tied to the barrel when there is nothing plugged into the jack and it is open when something is plugged in.
V+ and GND depend on if the power adapter you’re using is center positive or center negative. Sparkfun’s adapters are center positive.
I’d consider eating my shorts if sparkfun sold one of these barrel jacks that’s compatible with a breadboard.
Video or it didn’t happen! :)
yeah, or pics. either one.
Heck, I’d even consider eating your shorts if they’d do that.
Anyone have a lead on a breakout board for this guy? I’ve got some copper clad but I figured I’d see if something was pre-made first.
The SparkFun EAGLE library has this part; however, I’m a bit confused how to interpret the schematic diagram. The diagram has a filled rectangle in the upper left with a thin line extending out from the rectangle to the right. Below that are two more lines extending to the right. At the very bottom is a + symbol. Which ports provide the positive and negative power supply?
The rectangle is the center (pin), the middle line is the switch, the bottom line is the barrel. The ‘+ symbol’ is just the registration mark for the schematic symbol, not a label :)
See AndrewParnell’s comment for information on which physical pin is what and a pointer on polarity.
Newark has a pretty good deal on a nearly identical part:
It’s a 10-pack for $5.24. So it’s still cheaper to pick up a couple here on sparkfun unless you need them in bulk.
How are you supposed to mount a jack like this in a case?
I assume you’re supposed to solder cables directly to the through-hole lugs, since they don’t have the solder profiles like this one.
How, then do you hold the jack in place?
Thanks to anyone who can enlighten me.
These are intended to be board-mounted (i.e. directly soldered to a PCB), just like the one you linked to. You would design your board/case mounting so that this lines up with a cut-out (where the case slides over the jack) or a window (where the jack’s hole lines up with another hole).
I’m partial to panel mount jacks myself - much more flexible in terms of mounting options, but not really fit for mass-produced consumer products.. if only because you don’t want somebody unscrewing the locking ring and then have the jack disappear into the body, wreaking havoc ;)
I think there is a typo in the description: according to digikey, this is a 5.5mm jack, not 5mm.
Why are there two ground pins? It fits in my breadboard but it is at an angle and only one ground pin is in, the other is not, is that dangerous or can i work with it?
You might want to get the breadboard version of this jack…
does this fit on the 4 inch protoboard
also heres the link to the product your looking for ignore my other post. http://www.sparkfun.com/products/10811 pleasure shareing ingenuity withg you.
no it dosent it’s diamater is a little large just solder some wires to the pins and then your all set. ps hope this helps good luck.
As usual, make sure you read the datasheet, even on something this easy. Don’t be like me! :) Contacts 2 and 3 aren’t the same - sure they are connected when you put your VOM on them, but that’s only until the barrel plug is inserted - then a contact opens and the side pin is disconnected.
I guess this is so you can have it autoselect multiple power sources, but if you just need power, be sure to use the rear (tip) and bottom (ring) pins, not the side!
I used a similar technique as nike to mount this to a pref board. I filed down the edges of the bottom pins on each side. I also left the side tab full size, but bent it sideways so a wire could be run through it and the pref board. I then soldered the wire on each side to help hold the connector in place as the much smaller center pins, after being reduced in size don’t provide much strength.
The data sheet clearly says that the center pin is 2.0mm in diameter. Barrel jack dimensions are confusing.
I soldered some male header pins to this and put it in a breadboard.
FYI, The scale reference in the pictures is hilariously wrong.
How easily will one of these fit into a protoboard with 0.1" spacing?
Great catch on the scale, we’ll get that fixed!
Unfortunately these won’t fit well on a breadboard - the pins aren’t on a 0.1" grid and are too large for the breadboard holes anyway. I’ve soldered short wires on these for exactly this purpose, though it’s a little too easy to move the power cord and pull it out of the board.
I have found a simple solution to make these fit easily into a .1" proto board. I clipped of the bottom lead as flush as possible, then bend the other 2 leads 90 degrees so the holes are facing downward, then i put a small length of solid wire in and soldered it going straight down. if you bend them a little they will fit nicely, and flush, into a power rail, or onto a pcb. A bit of hot glue under it will make a nice solid fit on a pcb.
Will this work on the Arduino Pro board?
Can and will.
Why do you only sell the jack, but not the plug?
They do. Do a search for “power” and you’ll see a whole bunch of wall warts at various voltages.
Ummm, I think they mean a male version of this.
It’s hard to find male barrel jack connectors. They do sell a screw terminal version of the male jack, and ones that adapt to a JST and 9-volt battery, but you will have a hard time finding any other type. I assume this is because companies don’t want consumers making their own power plugs.
Based on 1 ratings:
Forgot your password?
No account? Register one!