Input device including a ratchet system with an electromagnetic actuator

An electronic input device, comprising:

• a ratchet assembly comprising a first ring magnet;
• a friction disc assembly movable between a first position and a second position, the friction disc assembly engaging the ratchet assembly when the friction disc assembly is in the first position and disengaging from the ratchet assembly when the friction disc assembly moves towards the second position;
• a spring applying a first force that biases the friction disc assembly towards the first position;
• a second ring magnet emitting a first magnetic field that generates a second force that biases the friction disc assembly towards the second position;
• an electromagnetic actuator configured to emit a second magnetic field that reduces a magnitude of the second force when current is applied to the electromagnetic actuator in a first direction and increases the magnitude of the second force when current is applied to the electromagnetic actuator in a second direction;
• and
• a knob enclosing the ratchet assembly, the friction disc assembly, the spring, the second ring magnet and the electromagnetic actuator within an annular cavity.