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Raspberry Pi Forum Epitaxial vs 1N4002 Diodes
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  • epitaxial
  • diode
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Related

Epitaxial vs 1N4002 Diodes

balearicdynamics
balearicdynamics over 11 years ago

Someone knows if it is acceptable to use diodes of the type 1N4001 or 1N4002 instead of epitaxial diode to manage signal channels with levels and frequencies of the order of the Ethernet 10/100 ? I have never used the Epitaxial pin diodes and I have no idea.

 

Thanks in advance, any suggestion is welcome image

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  • balearicdynamics
    0 balearicdynamics over 11 years ago

    Hi Michael,

     

    thank you for your answer that confirm again that this is the right choice. I will definitely us the LAN - that was the original idea - also because in someways the "box" should be opened to the possible external connections, further modules developed in future and so on.

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  • balearicdynamics
    0 balearicdynamics over 11 years ago

    Hi Clem,

     

    thank you for the detail. As you can read in the other post, for this specific case I think that the better solution is to adopt the LAN approach. There are also other aspects of the project that are involved making this solution the more reliable. In fact your suggestions are to take in account b me for other aspects of the project and you have added some informations that was totally unknown to me about the SPI mechanism to be used with two masters, that in this case can only make things more complex (more hardware, more software more of ...)

     

    As a matter of fact, the Arduino suggestion was also an idea I have considered, also because the SciFi your PI kit includes a PI board microcontroller, but making things more complicated just to add hardware is not an approach that I like.

     

    Cheers, enrico

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  • phoenixcomm
    0 phoenixcomm over 10 years ago in reply to balearicdynamics

    balearicdynamics Ciao Enrico whats up? I have been working hard to have a new tidbit to show off at Cockpit-Fest at the end of the month. image

    I Finally got the damn Pearl translated and updated in C. I spread it out over 6 modules... with the six header files a well. The update is to fix

    the Pearl global variables ie make them local and use C structures to hold the data. makes life better. and my buddy Paul to stop bitching about Pearl.

    No food to brag about but I just make some "Home Fries". Take some reds and nuke them for about 6min. cut them up to about 1"/30mmSQ Then toss themimage

    into a nice frying pan, add Green Peppers, Onions, Course Ground Black Pepper, and a *** Load of Garlic, and Chives optional .  Can also do in oven.

    cook medium heat, the object is to brown the spuds., then of course some bacon and eggs..image

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  • phoenixcomm
    0 phoenixcomm over 10 years ago in reply to balearicdynamics

    hey its me again, yes but no, your wired ethernet LAN is Full Duplex, with a switch, yes you can force it in to a HD mode but why?

    What Is Half-Duplex And Full-Duplex Operation, And How Does It Affect Your Router?

     

    Later

    Cris

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  • balearicdynamics
    0 balearicdynamics over 10 years ago in reply to phoenixcomm

    Hi phoenixcomm Cristina ! I am fine. Always raining here but lot of projects are going ahead... And as in the Netherlands it seems they have no idea on how to cook anything else then deep-fry stuff, I made great progresses with my personal variations of receipts.

     

    See you your potatoes seems really nice. I love this kind of cooking.

     

    Cheers, Enrico

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  • phoenixcomm
    0 phoenixcomm over 10 years ago in reply to balearicdynamics

    balearicdynamics, Enrico, What drugs are to taking, from Meditek thing??? Enrico, you are smarter than this, I thought. Building an e-net hub is crazy.  The diodes are the least of the problem, Remember you need Magnetics as well.

    Please go get a WRT-54G and remove its case.  The switches are very robust. you will have more than double the throughput  as 10Bt was never FD only HD.

    Plus you will have a 100 Mb backplane as well and you don't have, Plus another factor 10Mb to 100Mb good jump there as well. Oh yes, I almost forgot network collisions and retransmits, POFF, NONE, GONE

    his is a specialized processor, don't think the pie could deal with this.

    Cris

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  • balearicdynamics
    0 balearicdynamics over 10 years ago in reply to phoenixcomm

    phoenixcomm Hi dear phoenix image you are correct. Most of the parts of the first Meditech project was just a proof of concept and the next prototype (the one on the road for the product) will be reviewed in some strategical parts. I will publish more about this at the end of August. And the software too will be revised. And also this part will be notices further for some reasons. Contact me pvt for some preview news if you are interested.

     

    BTW, I have thenused a hacked hub for this solution.

     

    Enrico

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  • phoenixcomm
    0 phoenixcomm over 10 years ago in reply to balearicdynamics

    enrico_miglino That a way to go!! Knew you it in you!!image

     

    Cris H.

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