Servo Tester

by LayerLux3D

I dislike the cheap servo testers from AliExpress with a single button. When power is lost, they often switch modes automatically, which can cause damage. For example, if the tester switches to auto mode, it might trigger a full rotation cycle on the servo instead of staying in manual mode. To solve this problem, I designed a servo tester with fixed modes, selectable via dedicated buttons. Features - Neutral Mode: Sets the servo to 90 degrees. - Manual Mode: Allows you to configure the servo to a specific angle of your choice. - Auto Mode: Cycles the servo between the minimum and maximum values at a set speed. The device is operated with a rotary encoder. Pressing the encoder button cycles through the adjustable values, while rotating it adjusts the selected value. It is powered via USB-C and includes a switch to turn the servo on or off. The values are stored in the device. Required Parts 1x ESP32-C3 2x 1kΩ resistors 3x small switches 11x 8mm M3 screws 1x rotary encoder (EC11, 15mm shaft) 1x 1µF capacitor 1x I2C SSD1306 0.91-inch OLED display Additional wires and a soldering iron The ESP32-C3 code is in the .zip file.