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Thread: T4.1 Ethernet board

  1. #1
    Senior Member
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    T4.1 Ethernet board

    First up, great new board the 4.1

    I know your going to get a lot of this sort of thing.

    The Ethernet board, if the 6 pins on the Ethernet board were off set to one side, then it looks like the Ethernet board could be soldered via pins direct to the 4.1, no need for cable, unless you wanted one,

    Removes worry about the EM problems with the cable, let alone the cost of cable and connectors,

    now if the Ethernet card was wide enough that there were side pins that soldered down to the side pins on the 4.1 as well, may be 4 of them, then a strong enough for testing unit would be able to be made,

  2. #2
    Member MorganS's Avatar
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    Then you get one of these... https://www.mouser.com/ProductDetail...aYqXdbGAlwg%3D

    ...which is a combined USB and Ethernet socket so you could connect the USB pins too!.

    The real problem with a direct-soldered board like this is the Ethernet socket is the same width as the Teensy, so the pins clash. You have to mount the Ethernet jack at an offset, which may put it forward or behind the Teensy's USB socket or float above it on long pins. What is your preference?

  3. #3
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    Would anybody has an opinion if HR911105A Magjack could have the same performance as Wiznet RB1-125BAG1A suggested by Paul for T4.1 ethernet interface ?

  4. #4
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    Is it possible to patch pins directly into the 4.1 ie, a rj45 (cabled male) jack directly to the 4.1 then straight into a switch without a magjack? Thinking for testing on bench/lab

  5. #5
    Senior Member+ defragster's Avatar
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    Quote Originally Posted by crazy-logic View Post
    Is it possible to patch pins directly into the 4.1 ie, a rj45 (cabled male) jack directly to the 4.1 then straight into a switch without a magjack? Thinking for testing on bench/lab
    No. The magjack provides significant function in voltage reduction and signal presentation.

  6. #6
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    I just soldered up a minimal connector using just the one required 0.1uF capacitor on the magjack. It works beautifully and the UDP speed tests I've done show speeds over 90mbit/s.
    Click image for larger version. 

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  7. #7

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