Re: [beagleboard] Using two analog inputs and occurs distortion on the measure

Yes, you use the opamp as a low impedance buffer and you can also use it to scale the input to a range suitable for the ADC. Have a look at Analog Devices, (www.analog.com), they have many application notes on how to use an opamp as a signal conditioner suitable for an ADC. Regards, John >

Re: [beagleboard] Using two analog inputs and occurs distortion on the measure

Não gracinha, tá falando da pqp -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups "BeagleBoard" group. To unsubscribe from this group and stop receiving emails from it, send an email to beagleboard+unsubscr..

Re: [beagleboard] Re: X15 Boot via USB

On Friday, January 19, 2018 at 10:07:46 AM UTC-5, Roger Quadros wrote: > Hi Angel, > > On 18/01/18 06:09, Angel Sosa wrote: > > On Tuesday, January 16, 2018 at 11:51:57 AM UTC-5, marc bellazzini wrote: > >> Hello Angel,  > >> Mine is still collecting dust after my failed attempt at booting off the

Re: [beagleboard] Using two analog inputs and occurs distortion on the measure

Oh, thank you for the explanation. Are you talking about opamp as buffer or other circuit? Em sábado, 20 de janeiro de 2018 19:43:31 UTC-3, john3909 escreveu: > > The problem you are experiencing is due to the sample and hold of of the > ADC input which is multiplexed to all analog inputs. If you

Re: [beagleboard] Using two analog inputs and occurs distortion on the measure

The problem you are experiencing is due to the sample and hold of of the ADC input which is multiplexed to all analog inputs. If you don’t use a low impedance source, you will see bleed through from one ADC channel to the next. What you need is a opamp connected between the circuits you are meas

[beagleboard] replace the kernel of Debian on BBB

I download linux kernel code from github, configure, build it.when I replace the kernel of the Debian on BBB with my own builded kernel,there is a peoblem, I can't fix it

Re: [beagleboard] sysfs: cannot create duplicate filename '/bus/platform/devices/4a300000.pruss'

On Sat, Jan 20, 2018 at 9:12 AM, Hartley Sweeten wrote: > On Wednesday, January 17, 2018 at 12:42:03 PM UTC-7, RobertCNelson wrote: >> >> If you want "x11 and the lcd screen" you can use the "2gb" lxqt image: >> >> https://rcn-ee.net/rootfs/bb.org/testing/2018-01-14/stretch-lxqt-2gb/ >> >> If you

Re: [beagleboard] sysfs: cannot create duplicate filename '/bus/platform/devices/4a300000.pruss'

On Wednesday, January 17, 2018 at 12:42:03 PM UTC-7, RobertCNelson wrote: > > If you want "x11 and the lcd screen" you can use the "2gb" lxqt image: > > https://rcn-ee.net/rootfs/bb.org/testing/2018-01-14/stretch-lxqt-2gb/ > > If you don't care about x11, and just using the fb on the lcd screen,

[beagleboard] Kernel 4.9.45 - remoteproc - PRU shared Memory

Hi folks, right now I am trying to get the the PRU with the remoteproc-driver run. It ist working quite well, but there is one Problem which I dont now how to solve it. I am trying to use the shared Memory between the ARM and PRU. 4a31 startig adress. My Problem is that in my application I

[beagleboard] PocketBeagle… power supply dimensioning and power-off detection

Hi all, I'm slowly getting a small board together using the PocketBeagle for logic analysis and stimulus. For now, my experiments have revolved around powering the device off a USB host, however I'd like to eventually have the board self-powered via a 4-cell lithium battery pack, stepping that do

[beagleboard] Re: More pimux woes

You basically have 2 options regarding pinmuxing on a bb the config-pin utility requires the universal cape to be loaded as the only dtbo, you then use configure-pin to setup the pins you want. 2nd option, specify the overlays for the actual hardware you want to use, e.g robotics cape, bone