USB External Sound Card Module with Speaker Interface for Raspberry Pi, jetsun and pc  

3590S 100K Precision Multi turn Adjustable Potentiometer

XH-M401 DC-DC Step Down Buck Converter Power Supply Module XL4016E1

1/2W 1% (1.2Ω- 1MΩ) Metal film Resistors Kit 50 values each 10 pcs total 500 Resistors

CD4050 Non-Inverting Buffer IC

560nF (564) 50V Leaded MLCC Ceramic Capacitor

33nf 50v ceramic capacitor 

33000pF / 33nF / 0.033uF 50 Volts Ceramic Disc Capacitor

irf9540 p channel power mosfet

irf510 n channel 100v power mosfet