Lissajous Scope

Interactions

Drag the belt up or down (or click it) to move it to another pulley step: the frequency ratio changes and the screen draws a new Lissajous figure
Click an alternator: its rotor slips a quarter turn, so the wave jumps sideways or the figure changes phase
Drag the anode-voltage knob below the screen: a higher voltage makes the beam stiffer and the picture smaller; a low one makes it larger and the beam clips on the plates
Click the neon lamp: the brass sync link opens or closes, so the trace crawls or stands still