[Yaaarc] Vex transmitter/receiver

[Robert L. Doerr]

Dale Grover wrote:
> All Electronics has Vex remote control transmitter/receivers pairs for 
> $30.  See the comments under the listing for info on the need to 
> demultiplex the servo signals (if you are not going into a 
> microcontroller).  Comes with one crystal pair (75.970 MHz), a ground 
> frequency.  I guess these were meant as a secondary set of channels so 
> you could have 2 people controlling one robot, hence the funky 
> receiver.  Looked like an interesting deal.

I just ordered a couple of these sets.  In case you want to use these
in your own robot projects there are a couple people who have already
figured out how to make them work.  One in particular uses a $10 SX28
prototype board from Parallax to do all the decoding work and there is
an example program in SX/B.  For those of you that use the PIC chips
you should be able to use the example and convert it.  The link to
the example is:

http://forums.parallax.com/forums/default.aspx?f=7&m=175498

Instead of using the SX28 to just decode the signals the code could be
tweaked to allow for mixing (using a single joystick to drive) or even
add some extra features.

Best Regards,

Robert