Making a point the hard way.

The Electrical Engineering Stack Exchange strikes again.

Due to a disagreement on the EE Stack Exchange about what the current/voltage curve for a particular NPN transistor circuit would look like, I have built a current/voltage (IV) curve tracer for bipolar junction transistors. It has limited scope and capability, but it was good enough for what I needed.

I bashed it together in just a couple of hours, but it looks like describing and justifying all the things I did by “eyeball” is going to be more complicated. I’m also going to make a nice GUI for it, which will take a bit more time.

  1. Building an IV plotter from an Arduino Nano - Why am I doing this? - When I’m right, I’m right.
  2. Building an IV plotter from an Arduino Nano - Generating the bias voltage with stone knives and bearskins - Use what you’ve got.
  3. Building an IV plotter from an Arduino Nano - Measuring current with an Arduino - Ohm’s law doesn’t require a current shunt.
  4. Building an IV plotter from an Arduino Nano - Adding it all up
  5. Building an IV plotter from an Arduino Nano - A simple Python program to get started
  6. Building an IV plotter from an Arduino Nano - Prettying it up