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???
10/16/08 08:25
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#159109 - Lot of links
Responding to: ???'s previous message
Trangga Findanugroho said:
how to do with 89C2051 ?



Let says that FSK modulator had solved by using ladder resistors at one ports..

You can demod the FSK by using Op-amp(or op-amp inside MCU)
as comparator.."from sinewave to became square(digital)"..

using code..you can demod the FSK.

http://www.baycom.org
http://gb7tvg.dnsalias.net/~tvipug/

look how they make ladder resistors.

There's lot of TNC designers using ladder resistors for FSK/AFSK modulator.
and with op-amp as demodulator.

Thank's
Jeckson Ben









List of 11 messages in thread
TopicAuthorDate
Serial RS-232 over Radio Link            01/01/70 00:00      
   depends            01/01/70 00:00      
   Have you GOOGLEd "FSK Module"?            01/01/70 00:00      
   What kind of radio?            01/01/70 00:00      
      Could we start with this?            01/01/70 00:00      
         433MHz equipment cheap to buy            01/01/70 00:00      
   ebay to the rescue            01/01/70 00:00      
      I've seen cheaper, but, for a one-off ...            01/01/70 00:00      
   yes you can...            01/01/70 00:00      
      89C2051 how to            01/01/70 00:00      
         Lot of links            01/01/70 00:00      

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