Computer fans require 12 volts from a power source in order to operate inside computers. Computer fans are used in many different ways inside computers, to bring cool air into the case, extract hot air out of the case or blow cool air onto metal heat sinks to cool down hardware. Without a computer fan, hardware inside the computer will generate heat very quickly and will overheat in seconds. This will cause your PC hardware to easily get damaged during this process. If you have a spare computer fan that you dont require for a PC build, you can connect it to a 9 volt square battery for a small electrical project.
1) You will need a 9 volt battery snap connector. A battery snap, snaps onto the two metal positive and negative terminals, which are found on the top part of the battery. Using a battery snap ensures that when moving the wires about, the wire connections are secure to the battery, so they dont come off.
2) You will need a 9 volt battery. This will be the power source for your computer fan. Ensure that you purchase a brand new 9 volt battery, fresh out of the packet from a reputable manufacturer like Energizer or Duracell. This is because they are built to provide more battery life and will provide the full 9 volts to the fan. Cheap batteries are not the best alternative because they dont last as long and the voltage is really low.
3) Attach the 9 volt battery onto the battery snap. Line up the battery snap with the terminals on the battery and push it down. You cant get them mixed up because the battery snap is designed to only fit one way. Once the battery snap is fitted, you will hear a Click sound.
4) Wire up the wires from the battery snap to the computer fan. The battery snap will have two color wires, a Red (+) positive wire and a Black (-) negative wire. The computer fan will also have two wires of the same color, so all you need to now do is match the colors up and connect them. So get a Wire Stripper tool and remove the plastic coating insulation of all 4 wires. Then obtain the red wire from the battery snap and the other red wire from the computer fan a twist them together. Then obtain the black wire from the battery snap and the other black wire from the computer fan and also twist them together.
5) Tape up the connections you just made. Taping up the copper braids of the wires will prevent them touching each other and cause an electrical short in the circuit. So to prevent problems happening later on, cover them up with PVC electrical tape.
4) Wire up the wires from the battery snap to the computer fan. The battery snap will have two color wires, a Red (+) positive wire and a Black (-) negative wire. The computer fan will also have two wires of the same color, so all you need to now do is match the colors up and connect them. So get a Wire Stripper tool and remove the plastic coating insulation of all 4 wires. Then obtain the red wire from the battery snap and the other red wire from the computer fan a twist them together. Then obtain the black wire from the battery snap and the other black wire from the computer fan and also twist them together.
5) Tape up the connections you just made. Taping up the copper braids of the wires will prevent them touching each other and cause an electrical short in the circuit. So to prevent problems happening later on, cover them up with PVC electrical tape.
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