On 29 Jan 2005 06:03:20 -0800, "
wrote:

I am looking on information to control a hydraulic solenoid valve used
as a flow control valve by using PWM on the solenoid. I am trying to
control a machine by skid steer, and will use the flow control to
provide some trim control on slopes to cause it to go in a straight
line. I am trying to develop a method to control it by radio control.
there are a lot of cheap radio transmitters and receiver out there, but
I do not know where to get started. I have been told to incorporate a
hand held computer to program the PWM function for joystick controls,
and some just say I need a microcontroller.

Is anyone interested in giving me some help. I know you guys have done
a lot of this.

Joystick pot and two IC's. Spehro devised a cute circuit using a
555 and a CD4053 to produce 0 to 100% PWM with a pot. Spehro, may I
send cbear a schematic?

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