4 oct. 2016

SEATALK - ARDUINO BI-DIRECCIONAL ADAPTER


SEATALK - ARDUINO BI-DIRECCIONAL ADAPTER


For digital pins ( 0 -> 5V) not for Serials (5 -> 0V)

Schematic :
PCB (30 x 30mm):





With 7805 regulator for power to arduino and interfaces  (40 x 25mm):


13 comentarios:

  1. Hi German, do you sell the equipped and tested boards for private use?

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  2. I don't sell, but is very easy to make it

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  3. Did you create this PCB with Eagle? If so, would it be possible to get the file?

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  4. Sprint-Layout 6.0
    I will upload files and post link here

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  5. Link : https://drive.google.com/open?id=1B1Cfsm-5W9nOaGskvnwYdaCNEfxbzLbM

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  6. I see that you used a zener diode between the rx and the gnd of the arduino. Is this needed?

    In the pictures above (photo's, layout's and schematics), this diode is not always present...

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    Respuestas
    1. Looks like the zener is there to protect the RX output to the Arduino so that it never can go over 5V. Could be just preventative or it could be a decent measure against ESD being able to take out the Arduino.

      Eliminar
    2. Stabilize 5v signals to Arduino

      Eliminar
  7. Hi! What do you mean by "For digital pins ( 0 -> 5V) not for Serials (5 -> 0V)"?
    Not to use the Rx/Tx-pins on the Arduino and use SoftwareSerial (or something similar)?

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  8. Seatalk use 5-0v (bit 0-1) signal not 0-5v (bit 0-1)

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  9. Hi German, I found your projects very interesting concerning Seatalk stuffs, I have an ST4000+ and at the moment I want to use OpenCPN soft. to control my ST4000+. looking at the circuit supply here of Thomas Knauf you did added on R6, what is the reason for that? thanks and have a nice day.

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  10. TTL signal to Arduino must be 5V
    6k8 & 4k7 voltage divider for 12V from Seatalk power
    in the middle of two resistors = 4.90V

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