Cost: $800 | Time: 3 days
Power: The motor runs on 24 volts from two sealed lead-acid batteries, and drives the back wheels with a chain. Carnett plans to upgrade to polymer lithium-ion batteries to shave off about 12 of the board’s 60 pounds.
Going: The rider accelerates using a pistol-like trigger connected to a control box with a wire. The trigger and wire can be coiled and stowed when riding freewheel, so no electric parts get damaged or pose a danger in the event of a crash.
Stopping: To slow down, the rider squeezes a grip similar to a motorcycle brake held in the other hand, activating a rear-wheel disc brake that can stop the board far quicker than the regenerative-braking systems electric boards typically use.
The H2Whoa Credo: DIY can be dangerous.
We review all projects before publishing them, but ultimately your safety is your responsibility. Take proper safety precautions, and follow all laws and regulations.