Need information on radio controller PWM controllers

The handheld computer vs. microcontroller is just how much hardware you want to do to get it to work. I don't know if you really want to bang a solenoid back and forth, I'd rather do needle valve control or something else like that for the job. That would be easy with the R/C as the outputs of the receivers is a PWM signal to the servo motors and you can do big powerful servso with that system.

-- Why isn't there an Ozone Hole at the NORTH Pole?

I have looked at the servo valves. They will work, and also proportional hydraulic valves. My problem is trying to develop the controller that will control it by wireless. I can't afford the 4K Hetronix controller. I have thought about a flow control on each side connected to a stepper motor. This would allow for trimming the downhill side of the machine to keep ot straight. However, I never learned how to program these controllers so they knwo what I am trying to send. I also don't know where to start.....

cbear

Joystick pot and two IC's. Spehro devised a cute circuit using a

Mouser has Radiotronix radio modules for under $10. Digi-Key has Linx radio modules.

You might take a look at the hobby RC suppliers - that field has come a long way. Try

All bolt/plug together - no custom hardware or software. There are also dead-man modules that will take the motor to a defined position in case the radio link is lost.

Sure.

Best regards, Spehro Pefhany

The RC receiver sends pulses to the servo. This is from an old book but I think it still pretty accurate, at least for non PCM radio controls. The transmitter sends a 4.5 millisecond sync pulse followed by a series of pulses ranging from 1.0ms to 2.0ms with 1.5ms servo center. The first pulse after the sync pulse is channel 1, second pulse is channel 2, etc.. I have used a BASIC STAMP microcontroller to read pulses from the receiver and control outputs.

For the valves, it sounds like you would want proportional valves or servo valves. Also, you might be interrested in the heading hold gyro's that they use in R/C helicopters, this would help you hold a constant heading on slopes,etc.

Hope this helps! snipped-for-privacy@midwest.net