I know many of you guys are electronics geniuses as well as linux gurus. I need a very simple circuit and despite searching the internet I haven't found any real good recipes, except one rough schematic that I will present here.
Basically I have a simple linear actuator (12 V) with a built-in potentiometer for position feedback. My needs are pretty simple. I just need to be able to control the actuator to attain 3 positions: extended, middle, and retracted. I only need rough resolution, so I don't need a full PID circuit, I don't need the actuator to worry about overshooting and homing in like a normal servo does. I don't need PWM to drive the motor. I just need the thing to move and stop. Here is a link to a simple circuit that does exactly what I need (a switch and resisters can replace the POT): http://www.wisc-online.com/objects/ViewObject.aspx?ID=IAU4406 However it does not specify what sort of op amps to use. I am unsure how to translate the schematic into a working circuit with real parts. Also I don't know how to choose the resistor values. Can anyone give me advice here? thanks. Michael /* PLUG: http://plug.org, #utah on irc.freenode.net Unsubscribe: http://plug.org/mailman/options/plug Don't fear the penguin. */
