Obviouslly you need my PCBs so download the GERBERs and orther them at PCBWAYT.com. To get the sensor smaller PCBs just snap them with your hand and like that you will have 3 PCBs at the price of just 1. On the main PCB we have the ATmega328 chip for the main microcontroller, and the L6234PD for the motor driver. The PCB has extra stuff such as a buzzer for sound notifications, a MOSFET and a fan output to cool down the components and two inputs for a potentiometer or i2c control. Check the full list below.