Level Adaptor For Analogue Joystick

1 An analogue joystick usually contains two potentiometers, whose wipers are controlled from the central handle on the unit. Unfortunately, the angle covered by the handle is gener- ally only about 90°, whereas the potentiometer"s spindle and wiper can be rotated over 270°. The voltage range provided by a potentiometer in a joystick is, therefore, relatively small. Two of the circuits described here make it possible to enlarge the output voltage range of both potentiometers in the joystick. The circuit is readily doubled, thanks to the use of dual CMOS operational amplifier Type LEVEL ADAPTOR FOR ANALOGUE JOYSTICK 18 SUPPLEMENT TLC272. Each of the two wiper voltages from the joystick is processed separately, which enables in- teresting effects to be achieved. The amplification of the circuit is determined by P3. This preset enables the enlarging of the potentiometer"s "range" to individual requirements. Preset P2 serves to shift the operative range of the potentiometer within th...