assemblying a computer

A couple of weekends ago my older brother wanted a high performance computer and he decided to buy the parts desperately and assemble it himself so he can customize it. I had nothing better to do so i decided to give him a hand. The first step was to install the cpu and the fan to the motherboard. The fan, which is the large circular shaped metal part in the picture, works by using a metal heat sink to draw the heat away from the cpu. It has a large surface area and a fan to keep the cpu cool and prevent overheating. The motherboard itself has over 80 capacitors, most of them were small but there were a few larger ones. We then installed the motherboard into the computer case. Next step was the graphics card. All of the circuit boards came in a metallic coated bag,shown in the picture, which prevents any static electric charge from destroying any of the electronic components. this happens because of Faraday cage which disperses any current around the outside while keeping the inside completely unaffected by any charge. After we installed the memory ram and the hard drives. The hard drives have an electromagnet so we had to make sure it did not come close to a strong magnet which would have messed up the hard drive. All the was left was to connect all the wiring and the power supply and all the small components. The end product is a high performance custom computer.

Car speakers

A couple of weekends ago i installed a new audio deck for the car i just got. Now the next step was to get speakers to replace the 16 year old blown out stock speakers. The first step was to remove the door panel to get to the speakers. The old speakers, as you can see in the picture, were blown out and the cone was no longer attached to the outer edge of the speaker like it should be. Replacing the speaker was as easy as unscrewing the old one and screwing in the new one. The two speaker wires were striped and connected to the corresponding positive and negative feeds on the new speakers. The new speakers i bought also came with tweeters. To install these i had to drill a whole into my door panel then wired the positive and negative wires for the tweeter. Both speakers have the same components; a permanent magnet, an electromagnet that is pulled and pushed by the permanent magnet when a current pass through the wires, and a cone to increase the surface area that pushes the particles of air. The tweeter is smaller and is used for the higher frequency sounds. higher frequencies have more vibrations per second so the smaller area of the tweeter is able to vibrate faster to produce the higher treble pitches well. The other speaker has a medium size cone and is used for mid range frequencies. The larger area of the cone allows for more air to be pushed and at lower frequency than the tweeter to produce the mid to low bass range sounds. After i put everything back together the new speakers sounded great. Now all i need is a sub-woofer to get some real bass.