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Part 3 of the hand soldering tutorial. This time Dave shows you how to drag solder and tack & reflow SMD components, and in particular 0.5mm fine pitch IC’s. Including solder paste and hot air.
Dave takes you through everything you need to know to do good quality soldering.
Part 1 is all about the tools you might need.
A lot of this was already covered in general lab tools video.
Afroman shows you what to look for in a multimeter, and how to use a multimeter to measure voltage, current, resistance and continuity.
Cantenna
From Wikipedia, the free encyclopedia
A “cantenna” is also a brand name for a dummy load.
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A cantenna.
A cantenna is a directional waveguide antenna for long-range Wi-Fi used to increase the range of (or discover) a wireless network.
Contents [hide]
1 Origin of the name
2 Construction
3 Usage
4 See also
5 External links
6 References
[edit]Origin of the name
Cantenna dummy load suitable up to 30 MHz and up to 1 kW
The term ‘Cantenna’ originally referred to a product sold by Heathkit Co. in Benton Harbor, MI, USA. It was a 50-ohm resistive load used by radio amateurs.[1] However, in the more casual vernacular of the Do-It-Yourself community, it has functionally become a portmanteau of can (e.g. an empty Pringles can, see below) and antenna, since they’re used to broadcast (and receive) signals, and not just terminate them.
[edit]Construction
Although some designs are based on a Pringles potato chip can, in reality this tube is too narrow to be practical.[2], however a cantenna can be made from various cans or tubes of an appropriate diameter.[3] Some designs include a pole mount to elevate the cantenna.[4]
[edit]Usage
While cantennas are useful for extending a wireless local area network (WLAN), the tiny design makes them ideal for mobile applications such as wardriving. The design of the cantenna is so simple that it is often the first antenna WiFi experimenters learn to build. Cantennas can even be used to increase cell phone range,[5] improve reception and decrease noise.
[edit]See also
FON#La_Fontenna, an omnidirectional, cheap and high power antenna to distribute internet access around the world using a series of wireless LAN’s
WokFi antenna
This video is about electrical wires. It describes common types, configurations of wire, and wire terminology. It explain the gauge system of rating wire size (diameter), circular mils, current capacity, and others.
This video describes Resistor Color Codes and how to read them. It relates Resistor Color Codes to scientific numbers and engineering notation.
