This is a mod to a cheap phone case to cool a mobile phone. I'm using my Samsung S7 but this can be applied to any phone and case.
Items needed
- Cheap rubber case (ones from poundshop is fine!)
- 6cm USB powered fan
- 4 nylon M4 screws and nuts
- Finger guard for fan
- OTG cable
Cut a 5cm hole where the fan goes
Punch holes for the fan screw holes
Attach fan and finger guard with nylon screws
Nylon screws is important as it won't scratch the phones back.
Finally assemble plugging in the OTG cable
Thoughts
For improvements, I would rewire the fan with a thin 2 wire ribbon cable cut to length to a micro-usb header. This will remove loose wires and reduce bulk.
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