USB shield – usb host shield
if you will not use External Power please be sure this jumpers are soldered as below :

so after soldering it will be like this image

POTENTIOMETER MODULE- VARIABLE RESISTOR POT MODULE
1 × 18 SAR
IR Remote Control+Receiver Module
1 × 37 SAR Subtotal: 55 SAR
POTENTIOMETER MODULE- VARIABLE RESISTOR POT MODULE
1 × 18 SAR
IR Remote Control+Receiver Module
1 × 37 SAR Subtotal: 55 SAR
if you will not use External Power please be sure this jumpers are soldered as below :

so after soldering it will be like this image

All Electronics Components
All Electronics Components
All Electronics Components
All Electronics Components
All Electronics Components
All Electronics Components
All Electronics Components
All Electronics Components