Integration with Wheelchair

Electronic components were housed in a box laser cut from 3.4mm thick black acrylic and held together with epoxy. The plans for the box are shown below, and you can find them here. The inner dimensions are 4 x 7 x 5 (in cm).

Left: laser cutter plans for the box; right: the box after assembly

The electronics box was taped to the back of Lisa's wheelchair (see picture below). Three pairs of wire were fed through the holes in the box - one for the 24V wheelchair battery, and one to the motor, and one to the limit switch. The wires to the motor and limit switch were tied together with zip ties and routed to the front of Lisa's wheelchair, where they were soldered onto the motor and onto the limit switch. Moldable putty and heat shrink tubing was used to protect the solder connections.

Left: the device on Lisa's wheelchair; right: the electronics box taped to the back of Lisa's wheelchair