AAXA P300 Pico Projector Fan Adapter

thingiverse

This is a parametric fan adapter for a specific pico projector plagued by a noisy fan. It enables you to remove the original fan and securely fasten a silent fan to the outside of the projector casing. The included 30mm fan spins at 9000rpm, producing an extremely loud sound. I swapped it out with a 92mm 2000rpm fan that is almost completely silent when used with this adapter. With the adapter in place, the perceivable projector noise has shifted to some sort of switching sound emanating from within the light engine itself. I experimented with adjusting the hull extrusion height as low as 10mm, and it seemed sufficient, but the exhaust airflow out of the front of the unit was noticeably less than the factory solution. A 20mm hull extrusion height appears to produce similar exhaust airflow when paired with the 92mmm 2000rpm fan I chose (actual science, not a joke). Note that if you select a lower RPM fan, you'll need to design an RPM signal generator or else the projector will shut down after several seconds. I utilized a 555 Timer with a 1 uF capacitor and a 5kOhm potentiometer. I'll attach the circuit schematic later...