Looking at the schematic for the Blue,
"https://github.com/beagleboard/beaglebone-blue/blob/master/BeagleBone_Blue_sch.pdf";,
1st page upper right hand corner, there is a "2S Lithium Balancer and
Protection" circuit. This uses a BQ29209 chip. The "Electrical
Characteristics" for this device,
"http://www.ti.com/lit/ds/symlink/bq29209.pdf";, give maximum values but
the device is based on 2S not 3S LiPo's. Using a 3S or 6S might
invalidate the warranty.
The barrel connector and LiPo battery both connect to a AP1509 5VREG,
there are diodes protecting against reverse current flow. 12VDC feed
from the barrel jack basically shuts off current flow from the ~7.4 VDC
battery into the AP1509 while without the 12VDC feed, the LiPo battery
will feed the AP1509. You can have one or the other or both sources,
these do not affect the 2S balancer.
Chad
On 3/31/17 10:05 AM, Ted Carancho wrote:
Per the data sheet William link, it states Power Source input of 9-18V
for DC Jack... plus there is a 12V sticker on it too.
I had also checked the schematic and it uses the AP1509 voltage
regulator which says to have a max Vin of 24V. I was interested in
seeing if it could support a 6S LiPo ultimately for a future
multicopter project.
Any other thing to look at guys?
On Friday, March 31, 2017 at 6:04:32 AM UTC-7, cmbaker3 wrote:
The Blue uses a 2S LiPo battery. ~7VDC vs ~12VDC. In the specs
that William ref'ed look for section e, Power management, ii => 2
cell (2S) LiPo battery charger.
I haven't checked the schematic, but you might have caused a problem.
Chad
On 3/30/17 11:22 PM, Ted Carancho wrote:
Thanks for the response William,
I followed the directions online to put in a formatted uSD card
with firmware, held the boot button down (it's a momentary push
button, not an on/off switch) while plugging in a 3S Lipo (12V).
No booting from uSD happens . To double check I viewed the
process on YouTube (for BB Black) to make sure I was doing what
was expected.
What do you think? I realize these boards are new (says
Beaglebone Blue Rev A2 on back) but I hope there isn't some sort
of defect with them. I used a DMM to verify that the push
buttons are shorted when depressed.
Anything obvious I'm missing?
On Thursday, March 30, 2017 at 12:31:22 PM UTC-7, William Hermans
wrote:
Hello,
I do not have a beaglebone blue personally, but if you
mentioned it I'm not seeing if you switched the boot switch
or not.
https://github.com/beagleboard/beaglebone-blue/blob/master/docs/BeagleBone_Blue_ShortSpec.pdf
<https://github.com/beagleboard/beaglebone-blue/blob/master/docs/BeagleBone_Blue_ShortSpec.pdf>
Scroll down to the "balloon" diagram, and look at the switch
that is nearly opposite of the 5v barrel jack.
On Thu, Mar 30, 2017 at 12:31 AM, Ted Carancho
<[email protected]> wrote:
Help! My BBBL just arrived Monday and was in the middle
of porting my quadcopter code to it. I was able to get
9DOF measurements from it and decided to take it to the
library with me, so I put it back into the static bag it
came with, placed it in the original box in between the
ESD foam it came with and placed it into my backpack.
When I took it out, I found that it was unresponsive. I
thought maybe I somehow bricked it by not doing a
shutdown -h before unplugging it, so I tried to follow
online directions on booting from an external uSD card.
If I power the board from USB or an external 3S Lipo, all
I see is the blue ON LED, the LIPO status LED stuck at
75, and the G and R LED's on (picture below). If I press
the SD button with the uSD already plugged in and apply
power, I don't see any blinking lights that tell me it's
booting from the uSD card.
<https://lh3.googleusercontent.com/-Yc4XsOXH3Mo/WNyzdyE9ZfI/AAAAAAAAAUU/mO37vRZfgvs50Sxu9LFfIMP8Y4SxJQ0BACLcB/s1600/BBBL.JPG>
I've tried the Debian8.72017-03-19
<https://debian.beagleboard.org/images/bone-debian-8.7-lxqt-4gb-armhf-2017-03-19-4gb.img.xz>
IoT
and Debian8.72017-03-19
<https://debian.beagleboard.org/images/bone-debian-8.7-lxqt-4gb-armhf-2017-03-19-4gb.img.xz>
LXQT
firmware, I tried a 8GB and a 32GB uSDHC card, I tried 2
different USB cables. When plugged into a USB port, I
can't find the network access point to be able to login
using 192.168.7.2, and also I can't ping the device over
it's wireless network after I had configured the wifi
using connman.
I'm starting to think that the hardware was somehow
damaged (but I felt I took appropriate ESD
considerations, and transported it in its box).
This is my first beagle bone product ever (but have used
many Arduino's, RPI and Intel Edison). Is there some
newbie mistake I'm making? Thanks for your help in advance!
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