For educational purposes, I would like any pointers/slick tricks on using
a PIC to determine carrier frequency and modulation for a variety of uses:
-
A truly "universal" IR/RF learning remote control. Receive and detect carrier
from 30khz to 60khz (I know that IR modules dedicated to certain frequencies
are available, but I am not aware of any that cover 30-60k, and I know
absolutely zero about the "rf" type of remote controls). After the carrier
frequency is determined I would then need to decode the modulation. At
this point I would send the relevent data to a PC Visual Basic program
to "massage" as I see fit. I would also like to reverse the process and
have the PIC control the transmit carrier frequency and modulation.
-
Decode FSK modulation (CCITT V.23) which uses 1300 and 2100hz for mark
& space at 1200bps. I am aware that I can buy an off the shelf modem
chip - but I am one of those that enjoys the torture (beat me, hurt me,
make me write bad checks). To be used at half duplex over voice band FM
radio. Decoded data will be sent to a PC.
-
Decode PSK modulation at 2400bps. Also over voice band radio and sent to
a PC.
Please be kind in your comments about my sanity - I am legally required
to inform you that I own an Uzi AND a pair of postal shorts.
Thanks
Bill "Slick Willy" Rhoads
(the ORIGINAL Slick Willy)
wrhoads@earthlink.net