BSides Seattle 2024 - Stopping Ethan Hunt From Taking Your Data.pptx
Editor's Notes
The wheels of the hoverboard house the electric motors themselves. They also contain a tilt and speed sensor. This detects the rpm (revolutions per minute) of the individual wheel, and sends it to the gyroscope and speed control boards, located inside the main body, right next to the wheels.
GYROSCOPE / SPEED CONTROL BOARDS
The gyroscope and speed control boards receive the rpms and tilt information from the sensor inside the wheels, and they, in turn, send it to the main logic board.
When you calibrate your board, the gyroscopes are basically “zeroed”, as in, you’re telling the gyroscopes, “this is flat, hence this is when the hoverboard’s tilt is at 0”. To find out how to calibrate your board with your scooter’s remote, read our guide.
This is possibly the most clever part of the board: the pressure pads sit on two switches each.
Hoverboard Pressure Switches
When you lean forward, the front switch is pushed down, and a little plastic “wall” slides in-between an infrared LED and an infrared sensor.
Hoverboard Infrared Sensor
As long as the sensor detects the light, the logic board will “tell” the motors to be still. But when the light is interrupted (because of the switch being pushed down by your weight), the board tells the motor to spin in a particular direction.
So, for example, if you’re turning left, your foot activates the front right switch, making the right wheel spin forward, while your left foot activates the back left switch, making the left wheel spin backwards. It’s very clever.
The tilt sensors in the wheels tell the gyroscopes how far forward you’re leaning. The gyroscopes relay this information to the logic board.
The more you’re leaning forward, the faster the logic board tells the motors to spin, to sort of “catch up” with your center of gravity. It’s this simple (yet very clever) mechanism which allows you to control the cruising speed of the scooter with your weight.
Now that you know how they work, why don’t you head over to our Best Hoverboard guide for the best self balancing scooters on the market right now?