Electronic TV game control circuit - uses variable capacitor whose capacitance is controlled by player actuated lever

摘要

The electronic game control circuit is designed to convert the movement of control lever, actuated by a player, into an electrical voltage. The control leveris mechanically connected to the moving armature of a variable capacitor (Cv). The capacitor is connected in an electronic circuit (4) whose output voltage depends upon the value of the capacitance of the capacitor. The electronic circuit has a contact current source (1) which changes the capacitor. The circuit has switching means (2) actuated by a periodic pulse signal. Closure of the switching means permits periodic discharge of the capacitor. A detection circuit is used to convert the voltage at the capacitor terminals to a continuous voltage. The value of this continuous voltage is tied to the capacitance of the capacitor by simple relationship.