The hardware for this project is mainly a servo and a esp module.

There is two resistors between the esp and the servo. One to keep the gpio pin on the esp high when booting an one to protect the esp if anything goes wrong with the servo.

The rest of the circuit is an simple 3.3v regulator made of some resistor, capacitor and a npn transistor. I don't even know the type transistor I used, I did only use my multimeter to check if it was a npn. My parts bin was empty of npn transistor, and I did not have a 3.3v regulator either....

The 5V for the servo and input to the regulator is from a old phone charger with a broken plug.

There is an photo of my hand drawn schematics in the project description.