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Thread: Low cost RF for simple data link ( < RS 40 )

  1. #11
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    rSapien,
    i cann check out the Mpsh34 Fairchild part in Mumbai.
    I need time though.
    Reply if ur interested.

    -ice
    //gerry

  2. #12
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    Hi ice;
    you can take your own time.I got Bc 199 and Bc 337 40 and Bc 337 25 in my neighbourhood electronic store.If you find the fairchild one let me Know.I am very much interested why are you doubting that :roll: !!!!!
    robosapien84

  3. #13

    Default Avails...

    I think the Atmel Tiny is the only missing component .... I've found the alternates for the transistors here in Pune too.....

    Anybody with links on the Tiny?

  4. #14
    Administrator T-1000 rao's Avatar
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    Default gee

    Hey brat,,,

    If you check on the site... it says that all code was tested on an
    At90S2313

    So there it is.. the substitute to the last missing component



    Rao

  5. #15
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    Default Re: Avails...

    Quote Originally Posted by daaBRAT
    I think the Atmel Tiny is the only missing component .... I've found the alternates for the transistors here in Pune too.....

    Anybody with links on the Tiny?
    I dont think AtTiny 12 is available in India.The one Rao suggested is available.A bit of treasure hunting is required though!!!!!
    robosapien

  6. #16
    Administrator T-1000 vikas's Avatar
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    Default uC

    Its just the microcontroller which is to recive and transmit data ( you can use any one ) even the simple parallel port in place of it

  7. #17
    Administrator T-1000 vikas's Avatar
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    Default here u go

    another great RF based link i found on the net ( RF robot

    http://www.nelnickrobotics.com/df_robot.html

  8. #18
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    Quote Originally Posted by robosapien84
    Hey;
    Check this out got some equivalents for the transistors
    2N4401 = BC337a, BC637, BC639, 2N2221, 2N2222
    MPSH34 = BF199, BF224, BF311, BF373, BF497
    Is that ok.I want to cross check with you guys before implementing them in circuit.

  9. #19
    Dick Cappels
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    Default New URL for low cost serial link


  10. #20
    Senior Member Cyborg
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    Guys the microcontroller is a coder/decoder device...the RF front end is Pulsed AM device

    You can substitute the mcu with a monostable multivibrator & excite it with a coded signal generated by whatever controller you like.

    YOu can devise a simple Morse equivalent for starters

    Say 2 quick pulses for a 0 and one pulse for a '1' . The pulse interval & duration between each symbol can be decided by you.

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