Trigger for controller for model racing cars is contact-free, and uses printed coil in trigger plate, oscillator circuit, metal part, and signal intensifier

摘要

Trigger movements are detected contact-free in an inductive manner, esp. using a printed or etched coil (4) in a trigger plate (1). The coil is part of a high-frequency oscillator circuit(6). A pivoted plastic trigger (2) with metal part (3) conducts a trigger movement, so that the metal part, or a plate part with copper coating, is moved towards the coil. The metal extracts enough energy from the oscillator circuit to generate a signal. The signal is intensified to acts as control signal for a model racing car.