DIY Mini Projector

Led 3,7-4,2v (if this product is out of stock, you can buy the 12V version and use a DC-DC boost converter) 

5V cooler fan 

Old Smartphone (with LCD-TFT display & USB OTG support)

USB OTG: type C

                             Micro usb  

5mm foam board 

Old powerbank

Magnifying glass (~5x, diameter ≥ 70mm)