First of all : Soldering

We will teach you how to solder here :

Whatever it is you are soldering, you should 'tin' both contacts before you attempt to solder them. This coats or fills the wires or connector contacts with solder so you can easily melt them together.

To tin a wire, apply the tip of your iron to the wire for a second or two, then apply the solder to the wire. The solder should flow freely onto the wire and coat it (if it's stranded wire the solder should flow into it, and fill the wire). You may need to snip the end off afterwards, particularly if you have put a little too much solder on and it has formed a little ball at the end of the wire.

Be careful not to overheat the wire, as the insulation will start to melt. On cheaper cable the insulation can 'shrink back' if heated too much, and expose more copper core that you intended. You can cut the wire back after you have tinned it, but it's best simply not to over heat it.

The larger the copper core, the longer it will take to heat up enough to draw the solder in, so use a higher temperature soldering iron for larger cables if you can.

To tin a contact on an audio XLR connector, hold the iron on the outside of the the contact for a second or two, then apply the solder into the cavity of the contact. Once again, the solder should flow freely and fill the contact. Connectors such as jacks have contacts that are just holes in a flat part of the connector. To tin these you put your iron on it, and apply the solder to where the iron is touching. The solder should flow and cover the hole.

Once you have tinned both parts, you are ready to solder them together.

To solder them, you simply need to place your soldering iron onto the contact to melt the solder.

When the solder in the contact melts, slide the wire into the contact.

Remove the iron and hold the wire still while the solder solidifies again.

You will see the solder 'set' as it goes hard.

This should all take around 1-3 seconds.

• A good solder joint will be smooth and shiny.
• If the joint is dull and crinkly, the wire probably moved during soldering.
• If you have taken too long it will have have solder spikes.

If it does not go so well, you may find the insulation has melted, or there is too much stripped wire showing. If this is the case, you should desolder the joint and start again.

Source : http://www.mediacollege.com/misc/solder/

nVidia 300 series "Fermi" Rendering Capability

Visuals stemming from Nvidia's Fermi may make you do a double-take.

Memorex used to have a very catchy slogan: is it live, or is it Memorex? That very slogan came to mind when viewing a few outlandishly realistic renders here on a Chinese forum. Thanks to Nvidia's Fermi hardware, virtual realism has taken a huge step towards mimicking reality to the point of asking: is it real, or is it a render? A "dramatic upgrade" doesn't justify the visual leap Nvidia has made in virtually recreating faces and environments.

Fermi, the company's next-generation CUDA architecture, is jammed pack with more than 30 million transistors and a maximum of 512 CUDA cores "enabling supercomputer performance," as the forum post states. If the leaked images are indeed genuine--showing fantastic ray tracing goodness, facial hair, and even defined skin pores (sans zits)--then gamers have a lot to look forward to when Nvidia launches the GeForce 300 series... possibly by the end of the year.



Electronista points out that a second set of forum users have noted that Nvidia confirmed the launch of notebook versions of Fermi. While the supposed release date is a vague "near future," it's estimated that the chipsets will be aimed at the mid-to-low end laptops. The GTS 360M will serve as the company's mobile performance chip, and the GT 325M and GT 330M will be geared towards mainstream models. Low-end systems will likely integrate the GeForce 310M and 305M GPUs.

 Source : Tom's Hardware

Introduction

If you have browsed all the page in this blog, we only share what we know about hardware and software. So, we will give you something more interesting. Here, we are going to introduce you into a practical electronics. We add this page for those who want to make a simple electronic circuit, but never even touch a soldering tool. It’s ironic, isn’t it? We’ll give you a simple instructions or modules on how to make a simple electronic circuit. Of course we’ll teach you also how to solder, for it’s a basic to all practical electronics. Although there’s an easier method to make a better soldered circuit, we think it’s better for you to know the basics.