Re: Pulsing circut

>
> I would be interested.

Yep, 4046. The VCO in the chip offers a 1000:1 or better sweep range
versus the 555 and is linear with voltage. You can scale the sweep
range with changing one value of resistor. I dug through my old
files and posted it over on the DIY-CNC group since the files section
has been closed on this list to new uploads. The circuit has relays
so that pressing the "fire" button on the joystick switches from
computer control to manual control. The direction of any two axis is
controlled by the quadrant position of the joystick. The speed is
porportional to the amount of deflection on the joystick. There are
three ranges of speeds from very slow to fast. I actually had a PC
board layout and was ready to add this to my mill when Art put
joystick control into MACH1. It was simplier just to use the PC in
manual mode to move the motors. It has accel and deaccel and a
joystick deadzone in the center to kill pulses when the stick is
within a few degrees of being centered.

My circuit would make a fun joystick controlled plotter/drawing
machine (NC etch-a-sketch).

I added two more files that simplify the circuit and a text file that
describes how it works.

Have Fun!