- Some sort of pad/base (I used an old hdd shelf - this is especially useful because it has cooling vents however this may be small for many laptops - a stripped down desktop access hatch could work well, providing you strip the plastic caser)
- A PC fan, I used a 12v which is fairly powerful (<9v means you can run it on usb)
- An old phone charger/adapter that has the same voltage as your fan (I literately just pulled this from a pile of cables)
(a usb cable will work for a fan using less than 9v, i will include instructions for this in brackets at steps where i used the AC adapter)
Take your old fan and cut and strip the live and neutral wires (this is usually the red and black). If you have an earth wire (green), just isolate it by cutting it down, it's not needed.
After this cut and strip your charger/adapter. (or in the case of a usb cable, you should strip the outer cable to see 4 further wires. You will need to strip the black and red and should just isolate the green and white)
Now you should twist and cover in electrical tape/ solder the live and neutral wires. If you dont know which is which (as in my case as the adapter is black and white), just twist two together and test if it powers the fan. If not, you have it the opposite way round and should just switch the 2 and do the above.