I solved the problem (3.3 volt and some voltage values are coming to beagle
pins before the processor comes up) with a load switch. Its enable voltage
comes from the SYS_RESETn.
https://www.dropbox.com/s/7hocodvoeib2q76/valve_drive.pdf
After install the *switch load *on my board, the 3.3 volt i
From: Gerald Coley
Reply-To:
Date: Friday, May 2, 2014 at 10:01 AM
To: "beagleboard@googlegroups.com"
Subject: Re: [beagleboard] Two BBBs have broken down, is there any mistake
in my circuit board?
> These GPIO pins are dedicated to the LEDS. They do not go to the expans
These GPIO pins are dedicated to the LEDS. They do not go to the expansion
headers.
Gerald
On Fri, May 2, 2014 at 11:25 AM, wrote:
> Hi,
>
> OK i solved the 3.3V problem with a load switch, thanks again.
>
> One more thing, i put the BBB inside a box and need to check the power led
> without
Hi,
OK i solved the 3.3V problem with a load switch, thanks again.
One more thing, i put the BBB inside a box and need to check the power led
without open the box. So i'm trying to move the BBB's power led outside of
the box.
I find the pins of user leds in the BBB_SRM;
USR0 --> GPIO1_21
US
Just follow the link I sent. Do what ir says in whatever manner you choose.
If you put 5V into P9-5 and P9-6, the board will be powered on, unless you
press the power button causing it to power back down.
Gerald
On Thu, May 1, 2014 at 2:15 AM, wrote:
> Hi,
>
> Thank you for your reply.
>
> He
Hi,
Thank you for your reply.
Headers;
J1-J2-J3-J4-J5-J6-J7-J8-J18-J19-J20 / headers of valves,
J17 / header of pump,
J12-J13 / headers of digital input,
J9-J10 / headers of 12 volt and ground,
J14 / header of analog input.
Grounds are not tied together because high current switch is occur in o
I see lots of issues. Can you show what you have connected to what on your
headers?
Your 3.3V and 5V rails are on all the time. I suggest you take a look at
the SRM to see how to handle the power. The 3.3V cannot come up before
the processor comes up. You are violating that rule.
http://www.elinu
Hi guys,
I run 12V valves(insulated channels) and read pressure values by I2C with
my BBB board. I don't understand what has happened but two BBB were broke
down with this board.
When i am plugging in my power supply; one of the broken BBB's LED is not
work, the other one's LED is on but does
