IV Curve Tracing with a function generator

I have been asked about curve tracing using a function generator, as opposed to making an AC based octopus. This is a simple build that will let you test components with almost any function generator and oscilloscope.
Inspired by w2aew's video here: • #197:Simple V-I curve ...
0:00 Intro
1:05 Overview
2:55 Curve tracer circuit
5:12 Testing components
9:07 A look inside
11:04 With an analog function generator
14:12 With an analog scope
15:15 Wrapup