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  1. Thread: POE Circuit

    by GaryCNC
    Replies
    3
    Views
    277

    I would think you'd want to load the POE with the...

    I would think you'd want to load the POE with the resistor, but something isn't right.

    I know Wikipedia isn't exactly the best for accurate information, but here's what the POE page says:

    "To...
  2. The ethernet kit that PJRC sells for the 4.1 has...

    The ethernet kit that PJRC sells for the 4.1 has a ribbon cable that is at least 4 inches, so I doubt 2 inches of PCB trace would be considered long. As Phil said: match the lengths.
  3. Thread: POE Circuit

    by GaryCNC
    Replies
    3
    Views
    277

    Lights are always a fun way to waste power (LEDs...

    Lights are always a fun way to waste power (LEDs can be had that consume as much as 30ma, and there are light bars, too).

    Of course you could also use a power resistor.

    Given the power over...
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    A quick look suggests to me there's an issue with...

    A quick look suggests to me there's an issue with your SPI select. I may be wrong.

    But GD2 appears to want either Arduino pin 8 or 9 for select, while it seems the Teensy 4.0 uses 10.

    I didn't...
  5. Replies
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    267

    This isn't it? ...

    This isn't it?

    https://github.com/MHeironimus/ArduinoJoystickLibrary
  6. Replies
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    266

    I wouldn't make up MAC numbers randomly. There...

    I wouldn't make up MAC numbers randomly. There always exists the possibly of creating broadcast-matching addresses.

    I'm not sure why you can't just use something like 01:01:01:01:01:01 thru...
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    266

    The example ethernet code shows the register...

    The example ethernet code shows the register "ENET_TCR" being set with bit "ENET_TCR_ADDINS". (This tells the MAC whether to use the loaded MAC or leave the packet as loaded by you.)

    The example...
  8. As long as we're on this subject, may I ask what...

    As long as we're on this subject, may I ask what the yield() function in main is supposed to be doing? I looked at the code and it seems to provide servicing to USB / COMs. I have run my code with...
  9. I figured the PHY had requirements in order to...

    I figured the PHY had requirements in order to reliably TX/RX data at 100Mbps. I was hoping it wasn't going to be so much, though.

    But since writing that post, I've been thinking about:

    1....
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    I was able to get it to install only when the...

    I was able to get it to install only when the Arduino IDE was installed in its default location.

    (I used to have it installed on a different drive than the default. Teensyduino did not accept the...
  11. Replies
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    7,448

    ORing all the servo error signals together into...

    ORing all the servo error signals together into EStop would work.

    BTW, Is there any reason that JP11 can't be fed with 24V ?

    I can share a GND somewhere with my 24V supply since JP11 doesn't...
  12. Replies
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    Thanks for the response. I think initially...

    Thanks for the response.

    I think initially this will be just fine. Eventually, once I get my head wrapped around the code, I'll look into adding some things.

    I'm using servos so I can bring...
  13. Replies
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    Is there a version of schematic available which...

    Is there a version of schematic available which allows me to search signal names?

    I'm trying to apply this to a custom-built lathe. I certainly appreciate the schematic, but in JPG form it cannot...
  14. Replies
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    IIRC, SLIP was used in the dial-up. PPP, again...

    IIRC, SLIP was used in the dial-up.

    PPP, again as IIRC, is simply a format which encapsulates the packet (anything, really).

    It was based on HDLC, so it used a special flag character 7E which...
  15. Using the PHY/MAC as a physical layer for RS422-type traffic

    Hello all,

    I have been using high-speed RS422 in my applications for years. I've always wondered about using 100Mb ethernet as just the physical layer, though.

    RS485 parts are very pricey above...
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