Emulate a Tektronix 570 vacuum tube curve tracer
The Tektronix 570 Characteristic-Curve Tracer introduced in 1955 draws pretty graphs of a vacuum tube's plate current (vertical axis) against its plate voltage (horizontal axis). It does so for several grid voltages resulting in a handful of smooth curves on a phosphorescent screen. The 'Tek 570' weighed 75 pounds and measured 42x33x62 cms (86 liters). With modern electronics it should be possible to replicate this beast in a much smaller volume at a fraction of the weight. Let's build a Neptronix 570!