:
beagl...@googlegroups.com javascript:
Date: Monday, January 5, 2015 at 1:41 AM
To: beagl...@googlegroups.com javascript: beagl...@googlegroups.com
javascript:
Subject: Re: [beagleboard] CE and ESD, BBB is failing 4kV contact discharge
ESD testing
To give further background
, January 5, 2015 at 1:41 AM
To: beagl...@googlegroups.com javascript: beagl...@googlegroups.com
javascript:
Subject: Re: [beagleboard] CE and ESD, BBB is failing 4kV contact
discharge ESD testing
To give further background...
The BBB is positioned centrally at the front of a relatively
To give further background...
The BBB is positioned centrally at the front of a relatively large
enclosure. It is connected to a display/touchscreen which are also
situated in the same area.
The USB I/O is brought out of the enclosure at the side of the unit via USB
cables and another PCB.
From: lee.s...@bibby-scientific.com
Reply-To: beagleboard@googlegroups.com beagleboard@googlegroups.com
Date: Monday, January 5, 2015 at 1:41 AM
To: beagleboard@googlegroups.com beagleboard@googlegroups.com
Subject: Re: [beagleboard] CE and ESD, BBB is failing 4kV contact discharge
ESD
If we are just at this theme, what about the ethernet lines?
Looking at the schematic, sheet 9, the 4 active lines are directly
connected to the LAN8710 chip.
Or is there anything not visible inside the RJ45 connector?
Regards, Günter
--
For more options, visit http://beagleboard.org/discuss
If you look up the part number of the rj45 jack you will find it has
integrated magnetics which isolates the lan chip from DC currents.
On 12/30/2014 12:48 AM, 'dl4mea' via BeagleBoard wrote:
If we are just at this theme, what about the ethernet lines?
Looking at the schematic, sheet 9, the
Thanks Gerald. I will look into that and report back in the New Year...
On Tuesday, 23 December 2014 15:30:29 UTC, Gerald wrote:
You need to make sure that there is an earth ground on your power supply.
The case of the USB connectors go to the common point ground, which is a
zero ohm
Thanks for the prompt response Gerald.
The beagle has been designed into a system which is in a plastic and metal
enclosure. The only I/O it has to the outside (other than touchscreen) is
2 USB connections.
These connections are what are prone to the 4kv ESD. A discharge on the
shell of
You need to make sure that there is an earth ground on your power supply.
The case of the USB connectors go to the common point ground, which is a
zero ohm resistor by default to the DC ground input.
Gerald
On Tue, Dec 23, 2014 at 5:40 AM, lee.s...@bibby-scientific.com wrote:
Thanks for the
How is your esd protection designed at the usb connections, or are you
hitting the usb connectors right on the bbb? Would need a lot more
details about exactly how the system was being built and where you are
discharging to know what might be going on. I'm guessing your esd
protection may not be
On 12/23/14, 4:58 PM, Chris Morgan chmor...@gmail.com wrote:
How is your esd protection designed at the usb connections, or are you
hitting the usb connectors right on the bbb? Would need a lot more
details about exactly how the system was being built and where you are
discharging to know what
Hi Guys, I am seeing the same issue as Richard above. Was a solution ever
found for this ESD reset issue?
In the past I have had some success on solving this issue on other micros
by adding some capacitance on the micro's reset line to prevent the reset
I/P bouncing when the ESD takes place,
I am not sure what was used, other than putting it in a box or adding ESD
protection devices on every point on the board likely to be touched by a
person.
The certification was done by a lab. You are welcome to download the full
report from the WIKI.
Hello,
I'm interested in CE testing a device which includes the BBB. In order to
determine if the device will pass, I've been shocking it with an ESD gun
(both contact and discharge). I have been running into an issue where when
I shock the ground plane with a 4kV contact discharge, the BBB
CE testing that was does not cover ESD testing. This board has never been
tested for ESD.
Gerald
On Fri, Aug 1, 2014 at 12:21 PM, Richard Ketcham rich.ketc...@gmail.com
wrote:
Hello,
I'm interested in CE testing a device which includes the BBB. In order to
determine if the device will
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