What is the Part Number for the Mating Power Connector on the BrickPi?


Hello All,
Can anyone tell me the manufactures part number for the mating connector that connects to JP2 (power) on the BrickPi board? I know that JP2 is a series 6373 Molex, part number 22-23-2021. The Molex web page, (http://www.molex.com/webdocs/datasheets/pdf/en-us/0022232021_PCB_HEADERS.pdf) states that it mates with the 2695, 6471, 7880, 4455 and 7720 series connectors. Which on came with the BrickPi?

Thank you for your time.


Hey John,

Sorry for the late response. The Mouser part number is 123-5006/M-GR

Here’s a link.


Are you building it yourself or just looking for a replacement?

I have a BrickPi and a handful of your sensors, good stuff by the way.  I am looking to develop a more robust 9.0 Vdc power source for the BrickPi.  Something that might lend itself Well to Inductive charging.  I just did not want to cut the cable that came with my BrickPi.

As long as I have you attention, it appears that the BrickPi does not have any protection from connecting the power supply back awards, unless it is inherent in the LM2576.  Can you please confirm this?

Thank you for taking the time to answer my post.  Take care and have a great day!


BTW, a 9.0V power supply will not power the BrickPi and motors. Don’t know the exact cut-off, but we bought some nice, switching 9V supplies (they read about 9.1V under load) and they don’t work.

An 11V supply works well, but are hard to find in a convenient format. We have a 10.5V 4.3A, 45 Watt AC Adapter (designed for Sony Vaio Duo 13, Pro 11, 13) that we have yet to try, but I think it should work.


Hey John, thanks! And we’re really interested in your powering ideas. It’s probably the 2nd or 3rd problem we want to address (wifi weighs in heavily right now).

We tried powering the BrickPi with a 12V Tetrix battery, which has a tamiya adapter on it. It worked quite well, but it’s way too heavy for LEGO parts. There’s a balnce to be found here between weight and power.


John, also, yes, you’re right: there’s no reverse power protection. If you’re going to be hacking and splicing, we applaud you, but please be sure to get your polarity right!


Hey industrytrainer, quick question for you about the 9V supplies. What were they? And what amperage were they rated for? Sounds like it wasn’t a battery, maybe it wasn’t able to deliver on the amperage?


The supply that didn’t work is a Triad 9V 2.5A:


I haven’t looked for the power specs for the BrickPi/Motors so maybe 2.5A isn’t enough.

I don’t think that a 9V alkaline is good for more than about 3A if I’m reading this correctly:



BTW, I think that the raw mating connector (no 9V battery tab) is:

Molex 22-01-3027 (Mouser 538-22-01-3027 - http://www.mouser.com/ProductDetail/Molex/22-01-3027/?qs=%2Fha2pyFadujVoN8fcIRqZsMlWF6dgIQRsLjTxOPvJ04%3D )

you need to buy some pins to go along with it.


Part of you problem might be that you power supply has short circuit protection. Maybe because of the motors being an inductive load, have high inrush current and your power supply thinks that is trying to drive a short circuit and shuts Down. Have you tried to run the motors a a very low speed?

I have a 3,000 MA hour battery designed for using a 9.0 VDC @ 1 amp camcorder.  If I command the motors at a Speed of 255, the battery shuts down.  If I command a speed of 70,  it behaves properly.

Just a interesting experiment to try…


Could be, but I doubt it. In that case I would expect the whole pi to shut down which wasn’t what happened. IIRC the motors just didn’t run.

Haven’t done anything other than very basic tests but the:

Sony Vaio Duo - 10.5V 4.3A, 45 Watt AC Adapter

seems to be fine.