Electric Longboard

ELECTRIC LONGBOARD

Designed a mechanical and electrical system for a detectable 5th wheel to be mounted on a longboard.

MECHANICAL SYSTEM

Used Solidworks to designed 2 frames that would hinge allowing a spring to add pressure from the wheel to the ground for better traction.

The first frame connected to the longboard's trucks and has multiple spring mounting locations to adapt to any board and wheel heights.

Cut a 2000 lb electric winch 1 hp motor from its planetary gear casing and installed it on the second frame.

Added L brackets that connected to the wheel axle to add tension on the chain and enabled fine wheel direction tuning.

Welded a 35 series sprocket on a 6-inch diameter wheel.

ELECTRICAL SYSTEM

Bought a PWM 40amp controller with a forward and reverse switch, potentiometer and a duty cycle display. Installed a main switch, fan and a battery level display in a 3d printed control box. After running this setup a few times the controller failed due to heat and current issues.

Bought a new PWM 60amp controller with a 100amp peak load capability. This controller came with a heat sink and fan. For extra controller protection added a 67 CFM fan and a 50amp breaker.

Printed a handle to extend the control potentiometer.

Printed a safety system. Using a momentary push-button, designed a foot wedge to be connected to one pole of the motor. This system incorporated springs on the 3/8 bolts to ensure button release if the rider fell off.

Used 8 gauge wire and split tubing conduit flexible cover along the board for safety.

PROTOTYPING A BLUETOOTH PWM

Designing a Bluetooth PWM handle and receiver. The receiver will use SSRs to govern motor speed.

Paired Bluetooth modules as master and slave with known slave address.

Implemented logic level converters to take the Arduino 5-volt signals to convert them into 3.3 volts for the Bluetooth module transmitting and vice versa for receiving to prolong the module's life span.

Used a pull-down switch to dictate non-zero transmission.