Brainiac Mk1 Electronics

2011 Nismo#91

So I decide to crack open my MK1, labeled as 1.5, electronics and see what this 90 usd device was. I was having issues running a few devices on the hub and my tablet was slowly discharge while I was using it. Here are the pics.

Full system


USB-C PD chip


USB Hub


Essentially a 15W 5V (2.5A) power supply to a dedicated usb charger and a USB Hub. Hub is essentially a 5 port 2.0 Hub. There is a three position switch that I can't seem to figure out it's purpose, nothing power delivery wise changes in any position.
I tested it with a number of power inputs to the hub and regardless the max output power is 0.5A and it only drops as you add more devices to the hub. This is why my Samsung Tab A couldn't remain charged while being used. It's peak power draw is ~8W, idle, varies 3.3 / 5.9 / 6.7 Watt, and standby 0.15 / 0.6 Watt is the best info I could get. So that's barely going to be enough to charge while in standby. That tablet needs a dedicated 2A power delivery source to charge while in use. Now with my other devices plugged into that hub this system couldn't even meet the minimum needed to power my Audio Quest Dragonfly DAC.

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SeeThruHead

so i have the mark 1.7 electronics kit. And while I haven't installed it I did ask them a bunch of questions before ordering.

Basically I asked if I could run a usb dac on their hub and their response was yes.

The usb hub doesn't supply any power to it's ports when the ignition signal is off.
Also it doesn't allow power draw out of the tablet to power the hub or anything attached to it.

I might hook up my tablet and electronics outside the car to check if things are actually going to work sometime. Have to get them out of storage.

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2011 Nismo#91

Could run a usb dac on their hub and their response was yes.
Maybe, it did not work for mine but it worked in my Anker USB hub. I suspect there was not enough power to run the device.

The usb hub doesn't supply any power to it's ports when the ignition signal is off.
Yup, once that 15W power supply loses power all devices on the hub lose power.

It doesn't allow power draw out of the tablet to power the hub or anything attached to it.
Yep that chip/board pictured as USB-C PD is what prevents that.

scope22

Older tablets do not allow you to charge and be in hub/data mode at the same time, that is why they have removable face so you can take out the tablet and charge it once in a while