Quantity   Component name
1 × Wiper Motor http://www.monsterguts.com/store/product.php?productid=17685&cat=3&page=1
1 × Digital Knob for Arduino I2C - Absolute Encoder https://www.tindie.com/products/8759/
1 × Generic LN298 motor driver - the 6 pin type like this one https://www.banggood.com/Wholesale-Dual-H-Bridge-DC-Stepper-Motor-Drive-Controller-Board-Module-Arduino-L298N-p-42826.html