However, I know of several PC cards that will transmit any signal over a range of FM frequencies. These FM cards will transmit up to 1000ft.Have you tried with radios for airborne applications? e.g.. model aircraft RC
Use of an FM transmitter will allow me to accomplish my task via ready made hardware and software which is my preference since I am a Computer Scientist. I know that the controller for an RC car uses an FM frequency that is given. I know that it is a two channel FM transmitter. I know that each channel has a left and a right. I know that one channel is for forward and reverse and the other is for right & left. What I do not know is what to send on the left and right side of each channel in order to tell the car to go forward, reverse, left, & right. Maybe PWM is used? The width of the pulse determining the speed forward or backward?
You're both right and wrong if
you have a (RC)car with servos then you control them with PWM (1-0.5KHz
I think) but it is the receiver that convert the "digital bit stream"
from the radio to a PWM, so if you listen on the radio with a oscilloscope
(and e.g.. a scanner) you'll see that it is probably "only one channel"
(depending on the coding system) on the air.
Sincerely, Peter Hardwickpetecis@meganet.netI'll hope that this will help you a little but if you want more exact info on this subject I recommend you to contact an organization/ magazine/ manufacturer that works in the area
/Oscar