You are right, there must be something wrong but I do not know what. I understood that the blocking capacitor is missing. But I do not know if that is the only mistake and this is the reason why my beagle stopped working because of my cape....
I updated the circuit to that configuration like it is when I have it connected to the beagle. https://drive.google.com/file/d/0B8Fq4yYMgG7uTFlIRjdjcGRUYlE/edit?usp=sharing Am Montag, 15. September 2014 22:32:54 UTC+2 schrieb Gerald: > > So your contention is that this is all correct? Do I read you right? > > Gerald > > > On Mon, Sep 15, 2014 at 3:24 PM, <[email protected] <javascript:>> > wrote: > >> Thanks for your quick answer and very helpful feedback! >> >> I am not sure if I understood right. >> >> Currently I have to options to power the cape. >> 1. Use the cape without the Beagle >> --> Power supply over the FTDI connector and solder header Pin2-Pin3 >> connected on the MCP1703 side. >> --> 5V solder header Pin1-Pin2 connected >> --> 3,3V will be generated with the MCP1703 from the input voltage VIN >> >> 2. Use the cape with the Beagle >> --> Power supply all over the beagle headers and solder header >> Pin1-Pin2 connected on the MCP1703 side. Therefore no voltages will be >> generated by the cape itself... >> --> 5V solder header Pin2-Pin3 connected. 5V from the beagle. >> --> 3,3V from the beagle >> >> Therefore the atmega`s can only power up when the 3.3v supply of the >> header is available. >> The 5v supply is always on thats right. But 5v is only used for LED`s and >> the Piezo Buzzer and this parts are >> disconnected with a BC817 from ground. >> >> Yes all wires which are named as GND are connected. >> >> Do you really see an issue on that? What needs to be changed? >> >> Am Montag, 15. September 2014 21:56:47 UTC+2 schrieb Gerald: >>> >>> Your regulator must be turned off until the VDD_3V3 rail comes up. Right >>> now it comes up almost immediately as it is powered from either the >>> expansion header or a weirdly designed 5V DC input. The idea of gating the >>> ground to control power will not work as you already have a DC path to >>> ground, assuming that all of your grounds are connected together as >>> they should be. >>> >>> Gerald >>> >>> On Mon, Sep 15, 2014 at 2:45 PM, <[email protected]> wrote: >>> >>>> Oh I understood, I need to add the C1 on each Atmega 3V3 supply. --> >>>> blocking >>>> <https://dict.leo.org/ende/index_de.html#/search=blocking&searchLoc=0&resultOrder=basic&multiwordShowSingle=on> >>>> >>>> capacitor >>>> <https://dict.leo.org/ende/index_de.html#/search=capacitor&searchLoc=0&resultOrder=basic&multiwordShowSingle=on> >>>> But could that really be the issue which stopps the BBB running. I can >>>> also not boot the beagle up when I have removed the cape. >>>> When I want to boot up the beagle alone the power led flashes up one >>>> time...and thats it.... >>>> >>>> Am Montag, 15. September 2014 21:29:20 UTC+2 schrieb Gerald: >>>>> >>>>> IC1. Your regulator. >>>>> >>>>> Gerald >>>>> >>>>> On Mon, Sep 15, 2014 at 2:17 PM, <[email protected]> wrote: >>>>> >>>>>> What do you mean with C1? >>>>>> >>>>>> Am Montag, 15. September 2014 21:08:59 UTC+2 schrieb Gerald: >>>>>>> >>>>>>> Looks like C1 is not gated by the 3.3V rail from the BBB connectors. >>>>>>> >>>>>>> >>>>>>> . >>>>>>> Gerald >>>>>>> >>>>>>> >>>>>>> On Mon, Sep 15, 2014 at 1:54 PM, <[email protected]> wrote: >>>>>>> >>>>>>>> Hello all, >>>>>>>> >>>>>>>> I urgently requesting your support! I am desperate! >>>>>>>> I am currently developing a radio cape which has two Atmega328p, >>>>>>>> 3xRFM69 radio modules and some other small things on it. You can find >>>>>>>> the >>>>>>>> circuit in the following link: >>>>>>>> https://drive.google.com/file/d/0B8Fq4yYMgG7uQ3k3WkJUbG9icWs/ >>>>>>>> edit?usp=sharing >>>>>>>> >>>>>>>> When I use this cape on by BBB, the Beagle stopped working during >>>>>>>> operation. I tried to reboot it but it now do not boot up like the >>>>>>>> issue >>>>>>>> described in the Beagle Wiki as "Improper Power Down". I never >>>>>>>> unplugged >>>>>>>> the power cord from the board. It just stopped working. >>>>>>>> When the cape is connected to the beagle the components are sourced >>>>>>>> by VDD_3V3Exp and VDD_5V. So no external power supply. I additionally >>>>>>>> just >>>>>>>> have the Uart4/5 connected to my circuit.... >>>>>>>> >>>>>>>> I would really appreciate your help. Because I really do not >>>>>>>> understand what the matter is! >>>>>>>> >>>>>>>> THANKS A LOT! >>>>>>>> >>>>>>>> >>>>>>>> -- >>>>>>>> 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 [email protected]. >>>>>>>> For more options, visit https://groups.google.com/d/optout. >>>>>>>> >>>>>>> >>>>>>> -- >>>>>> 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 [email protected]. >>>>>> For more options, visit https://groups.google.com/d/optout. >>>>>> >>>>> >>>>> -- >>>> 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 [email protected]. >>>> For more options, visit https://groups.google.com/d/optout. >>>> >>> >>> -- >> 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 [email protected] <javascript:>. >> For more options, visit https://groups.google.com/d/optout. >> > > -- 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 [email protected]. For more options, visit https://groups.google.com/d/optout.
