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Recent content by jabidof

  1. J

    POE (Power over Ethernet) Ethernet to RS232/485 Converters

    Re: POE (Power over Ethernet) Ethernet to RS232/485 Converte Hi, Just curious, did u find such a module? PoE + Ethernet to serial interface. Thanks
  2. J

    How to build a omni WiFi for 2,4 GHz?

    Re: Omni wifi 2,4 GHz Hello zlatkoMM, Could you share your design?
  3. J

    SMD circuit protection for 24V powered system

    Re: Circuit protection 24V Thanks for those helpful information. Following that topic, i need some hint for the design of an autonomous device operating on battery. This battery is charged when 24V power supply is available. When the 24V is cut, the battery has to power the circuit and a...
  4. J

    SMD circuit protection for 24V powered system

    24v circuit protection I'm looking for an SMD circuit protection for a device connected to the 24V of a truck. I heard there could be voltage and or current spikes. How to protect the 5V electronics efficiently? Any hint much appreciated.
  5. J

    24V compatible input -> 5V microcontroller

    microcontroller 5v to 24v Thanks for your input. Appreciated the help.
  6. J

    24V compatible input -> 5V microcontroller

    24v as input for micro controller Hello there, I'm looking for a simple way to have an input to a device that is 24V compatible (truck voltage level). The idea is to have the "ignition contact" signal being inputed to a microcontroller unit. "Ignition contact" is 24V but microcontroller unit...
  7. J

    Eagle PCB short circuit check

    eagle pcb sau_sol: Sounds like you have an idea where those information could be found. Can you be so kind and let us know in here?
  8. J

    Eagle PCB short circuit check

    eagle circuit Hello, Does anyone know if there is a way to check in Cadsoft Eagle PCB software at board level if there is a short circuit between 2 signals? Thanks
  9. J

    Printed Circuit Board antenna / symetrical radiation pattern

    symetrical Anyone could tell me if the question is meaningless? :D
  10. J

    Printed Circuit Board antenna / symetrical radiation pattern

    circuit board antenna Ok, I found many info already. Thanks! Got another topic to discuss. The chip I use outputs 2 differential signals (180° phase shift). Do you have any idea of how to use that specification in an optimal way to feed an antenna having circular polarization? I believe we...
  11. J

    Printed Circuit Board antenna / symetrical radiation pattern

    pc board antennas Yes, FvM, you're right about the elevation angle mistake i've made. Could you detail a little more the antenna design you're proposing? Maybe you have some reference book or scientific article? Thanks for your help
  12. J

    Printed Circuit Board antenna / symetrical radiation pattern

    pc board antenna Anyone? Maybe description is not clear enough :-) Just let me know
  13. J

    Printed Circuit Board antenna / symetrical radiation pattern

    circuit board antenna Hello everybody, Does anybody already designed a PCB antenna that has a radiation pattern that is symmetrical in the XY plane. In other words, when the antenna lays on the floor it'll radiate with the same gain in the polar coordinates r-θ-φ whatever the value of φ...
  14. J

    Serial number mapping to a flash memory address

    internal structure of flash memory ic Good idea! What if we want to address 2 bits or more? We divide by 9, 10, etc?

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