Servo on a Transformer for ESP32 controlled Pure Sine Wave

First tests. Easy way to produce a variable, pure sine wave for vintage Lionel trains.
The ESP32 has built-in Bluetooth and uses the Arduino IDE and code.
Code: https://www.josephrampolla.com/servotransformer.html
High Torque Servo: https://amzn.to/3quIs1A
ESP32 with headers soldered: https://amzn.to/3DnQ1Pc
Power Supply for Servo: https://amzn.to/3B6gTRb
Improved servo jig: https://youtu.be/mta4hMzML1g