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  3. 433MHz amplified (>5V)

433MHz amplified (>5V)

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  • SparkmanS Sparkman

    @andriej Digikey has a good transistor selector. You can see the specs for the 4403 and then find something with similar specs that may be more readily available where you live.

    http://www.digikey.com/product-search/en?pv7=2&FV=fff40015%2Cfff80078%2C1140050%2C1280002%2C142c0044%2C142c02ca%2C142c1dec&k=transistor&mnonly=0&newproducts=0&ColumnSort=0&page=1&quantity=0&ptm=0&fid=0&pageSize=25

    Cheers
    Al

    A Offline
    A Offline
    andriej
    wrote on last edited by
    #21

    @Sparkman Thank you, will find them.
    I've also ordered some 20mW modules from China manufacturer with specially-made antenna (spring-one).
    I hope I'll get better range with that, especially that they're made for 3.3V and can be powered with max 5V.

    :-)

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    • Yohann StreibelY Offline
      Yohann StreibelY Offline
      Yohann Streibel
      wrote on last edited by
      #22

      Hi,

      I create a rflink pcb with this schema rflink_schema.jpeg.
      I have an emission issue, the module RF 433Mhz Out not have 12v in VOUT+.
      What could I need to do.

      This is the pcb design, maybe it needs some improvement.

      mon_rflink_pcb_design.png

      mon_rflink_pcb.png

      Thanks

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