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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 5.5mm jack, with a 2.1mm center pole diameter.
The pinout of the breadboard compatible is the same as the image shown below.
Image from the Connector Basics: Power Connector Tutorial
To connect to the DC barrel jack adapter using a center positive power supply, the pinout of the barrel jack adapter is:
Barrel Jack = Pinout Center "Tip"= Vcc, pin opposite of barrel jack input that is usually your "**+**" input voltage Shunt = side pin opens when a plug is inserted into the jack Sleeve = GND, pin closest to the barrel jack's input and it is usually "**-**" ground
Make sure to test your circuit’s connection with a multimeter set to measure before powering up.
For more information, check out this forum post in the Electronics Stack Exchange [ https://electronics.stackexchange.com/questions/141897/dc-power-supply-jack-connector-pinout ].
Based on 7 ratings:
1 of 1 found this helpful:
I’m very happy to have found this, as Amazon or anywhere else didn’t have one. It works right and fits nice and snug on a breadboard, but I would like it better if I didn’t have to test and label the pins myself.
1 of 1 found this helpful:
I highly recommend these if you are building PCBs. Well made, the small mounting pins easily mount to the PCB as advertised. Very sturdy once soldered.
3 of 3 found this helpful:
I used one of these many times to easily power a breadboard. The only thing lacking here is the confusing circuit diagram in the datasheet. Otherwise, the product is great and fits perfectly in normal spacing breadboards.
8 of 9 found this helpful:
It is worth mentioning that there is one positive and two negative poles while there is no plug plugged in. However, when the plug is plugged in there is only one negative and one positive pole (the one on the side is not used). Otherwise it is a very good product.
5 of 8 found this helpful:
Just received and used. Fits in the breadboard nicely.
Back pin is negative, middle under pin is positive for future purchasers :)
The spacing of the pins is indeed breadboard compatible (i.e. they are spaced for 2.54mm protoboards). But the datasheet doesn’t match that. For example, pins 1 and 2 are shown as 5.8mm apart, but that wouldn’t match the spacing of a breadboard. I think they are actually about 5.08mm apart, i.e. 2 * 2.54mm.
Polarity “depends on your power supply. Some are center positive and some are center negative. Your best bet is to grab a multimeter and see which part of the input is shorted to which of the output pins” (From a helpful comment in the comments section).
So the review from Member #366431 (above) is not necessarily correct about which pin is positive and which is not.
Just highlighting this here to reduce risk of other users accidentally getting the wrong polarity (as I just did).