Sounds like you need some help? We did a project for our community last Christmas.
We were asked by a local Ballet to Robotize a wheelchair. They used this wheelchair as a stage prop in THE NUTCRACKER. IN previous years they had a guy sitting in the wheelchair. Now this wheelchair was heavily modified. Almost everything was torn of except the controls.
The operater had to sit beneath the human angels dress totally blind. He even had to have a coordinator tell him where and how much to move through a Walkie-Talkie. This was not easy...
This wheel chair had 2 12 volt batteries hooked up in series. We had to use FIRST control systems and everything on the wheelchair was 24 volts. SO we had to come up with something to make this work...
We powered the control system with one battery (12 volts) and also used both batteries(24 volts) to control the motors.
We also needed to find 24 volt speed controls. So we looked to Innovation FIRST's other company
http://www.ifirobotics.com/ and we used their Battle Bot speed controls!
We then just hooked up the PWM signal to the Speed Controls.
If you didnt understand my post or you need to know more just let me know!
Bad BRad