So we essentially have a robot chassis and drive system that can carry a person! Our first idea was to make it remote controlled.
I'd make an add-on to mechanically pull the levers and push the buttons.
But -- of course-- they put the controls in the wrong side!So my friend convinced his parents to let him have the first wheelchair
And I believe the motors are controlled by a SSR. There is a black box with relay markings on top, and it obviously is not mechanical, since there is no clicking and the motors are speed controlled. SSR's can do pwm, right?
While I agree this could be dangerous, I think cr0sh is being a little over cautious, Having a large easy to reach cut off switch should be enough to ensure safety.
So as far as safety goes, there is a pretty convenient way we can add a shutoff switch. The chair can rotate, and there are switches to ensure it is facing all the way forward or all the way back before driving. So we just need a big NC button wired to those switches. We could also mount switches on the sides so if it collides with a wall, etc., it would shut off.
It is the 55135 Commando one.It appears to be an inductive joystick, with 6 wires coming out.
The representative sounded interested and thought it was cool, and she gave us the email address of the head engineer!