home made pc fan carbon filter
items needed
120mm pc fan
1ltr square pot
activated carbon
duct tape
2 x 120mm Black PC Fan Cooling Dust Filter Case Cover Aluminum Mesh 99p each ebay
4 x 70mm bolts + nuts
making the filter
1. drop one Case Cover in the 1ltr pot and push it down so its level and tite, mark the 4 corners in the pot
2. cut round the pot, 5mm lower than the 4 marks
3. put one Case Cover back in the pot and push it down so its soild
4. put the 4 bolts through the holes in the filter, so there pointing up in the pot
por activated carbon in the pot till its one inch off the top
5. place the other filter on and then the fan, so it pull air through the filter and bolt it soild
6. wrap duck tape round to stop any carbon falling out